Wei Xia

ShanghaiTech University

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ShanghaiTech University

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Harbin Institute of Technology

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Wei Xia has a total of 117 co-authors. Here are the top co-authors by number of shared publications:

Yanfeng Guo
ShanghaiTech University
7 shared publications
Hao Su
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
3 shared publications
Na Yu
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
3 shared publications
Xia Wang
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
3 shared publications
Zhiqiang Zou
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
3 shared publications
Weiwei Zhao
Harbin Institute of Technology (Shenzhen)
2 shared publications

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Cited by 152
- 9 March 2023
- Published by American Physical Society (APS) in Physical Review Research
Coexistence of multiple stacking charge density waves in kagome superconductor ${CsV}_{3} {Sb}_{5}$
by Qian Xiao, Yihao Lin, Qizhi Li, Xiquan Zheng, Sonia Francoual, Christian Plueckthun, Wei Xia, Qingzheng Qiu, Shilong Zhang, Yanfeng Guo, et al.
The recently discovered Kagome family $A V_{3} {Sb}_{5}$ ( $A$ = K, Rb, Cs) exhibits rich physical phenomena, including non-trivial topological electronic structure, giant anomalous Hall effect, charge density waves (CDW) and superconductivity. Notably, CDW in $A V_{3} {Sb}_{5}$ is evidenced to intertwine with its superconductivity and topology, but its nature remains elusive. Here, we combine x-ray scattering experiments and density-functional theory calculations to investigate the CDWs in ${CsV}_{3} {Sb}_{5}$ and demonstrate the coexistence of $2 \times 2 \times 2$ and $2 \times 2 \times 4$ CDW stacking phases. Competition between these CDW phases is revealed by tracking the temperature evolution of CDW intensities, which also manifests in different transition temperatures during warming- and cooling measurements. We also identify a meta-stable quenched state of ${CsV}_{3} {Sb}_{5}$ after fast-cooling process. Our study demonstrates the coexistence of competing CDW stackings in ${CsV}_{3} {Sb}_{5}$ , offering insights in understanding the properties of this system.
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- 9 March 2023
- Published by American Physical Society (APS) in Physical Review Research
Top Cited Papers
Open Access
Coexistence of multiple stacking charge density waves in kagome superconductor ${CsV}_{3} {Sb}_{5}$
by Qian Xiao, Yihao Lin, Qizhi Li, Xiquan Zheng, Sonia Francoual, Christian Plueckthun, Wei Xia, Qingzheng Qiu, Shilong Zhang, Yanfeng Guo, et al.
The recently discovered Kagome family $A V_{3} {Sb}_{5}$ ( $A$ = K, Rb, Cs) exhibits rich physical phenomena, including non-trivial topological electronic structure, giant anomalous Hall effect, charge density waves (CDW) and superconductivity. Notably, CDW in $A V_{3} {Sb}_{5}$ is evidenced to intertwine with its superconductivity and topology, but its nature remains elusive. Here, we combine x-ray scattering experiments and density-functional theory calculations to investigate the CDWs in ${CsV}_{3} {Sb}_{5}$ and demonstrate the coexistence of $2 \times 2 \times 2$ and $2 \times 2 \times 4$ CDW stacking phases. Competition between these CDW phases is revealed by tracking the temperature evolution of CDW intensities, which also manifests in different transition temperatures during warming- and cooling measurements. We also identify a meta-stable quenched state of ${CsV}_{3} {Sb}_{5}$ after fast-cooling process. Our study demonstrates the coexistence of competing CDW stackings in ${CsV}_{3} {Sb}_{5}$ , offering insights in understanding the properties of this system.
Cited by 152
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- 1 January 2022
- Published by Optica Publishing Group
Photoinduced Dimension Crossover in 1T-TiSe2
by Alfred Zong, Yun Cheng, Jun Li, Wei Xia, Shaofeng Duan, Wenxuan Zhao, Yidian Li, Fengfeng Qi, Jun Wu, Lingrong Zhao, et al.
1T-TiSe2 hosts a 3D charge-density-wave (CDW) state that also features exciton condensation. We find that photoexcitation suppresses the 3D CDW while creating a 2D CDW, a process controlled by the excitonic correlations in the system.
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- 1 January 2022
- Published by Optica Publishing Group
Photoinduced Dimension Crossover in 1T-TiSe2
by Alfred Zong, Yun Cheng, Jun Li, Wei Xia, Shaofeng Duan, Wenxuan Zhao, Yidian Li, Fengfeng Qi, Jun Wu, Lingrong Zhao, et al.
1T-TiSe2 hosts a 3D charge-density-wave (CDW) state that also features exciton condensation. We find that photoexcitation suppresses the 3D CDW while creating a 2D CDW, a process controlled by the excitonic correlations in the system.
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Cited by 29
- 19 December 2021
- Published by Wiley in Physica Status Solidi (RRL) – Rapid Research Letters
Covalent Mixing in the 2D Ferromagnet CrSiTe₃ Evidenced by Magnetic X‐Ray Circular Dichroism
by Barat Achinuq, Ryuji Fujita, Wei Xia, Yanfeng Guo, Peter Bencok, Gerrit van der Laan, Thorsten Hesjedal
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- 19 December 2021
- Published by Wiley in Physica Status Solidi (RRL) – Rapid Research Letters
Open Access
Covalent Mixing in the 2D Ferromagnet CrSiTe₃ Evidenced by Magnetic X‐Ray Circular Dichroism
by Barat Achinuq, Ryuji Fujita, Wei Xia, Yanfeng Guo, Peter Bencok, Gerrit van der Laan, Thorsten Hesjedal
Cited by 29
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Cited by 2
- 15 September 2021
- Published by Association for Computing Machinery (ACM)
Correlation Analysis between Cultural Context Level and Education/Culture/Geography/Society -Related Parameters in Twenty-six Countries
by Wei Xia, Bo Sun, Zhizhou Zhang
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- 15 September 2021
- Published by Association for Computing Machinery (ACM)
Open Access
Correlation Analysis between Cultural Context Level and Education/Culture/Geography/Society -Related Parameters in Twenty-six Countries
by Wei Xia, Bo Sun, Zhizhou Zhang
Cited by 2
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Cited by 10
- 15 March 2021
- Published by American Physical Society (APS) in Physical Review B
Measurement of electronic structure and surface reconstruction in the superionic ${Cu}_{2 - x} Te$
by S. Liu, W. Xia, K. Huang, D. Pei, T. Deng, A. J. Liang, J. Jiang, H. F. Yang, J. Zhang, H. J. Zheng, et al.
Recently, layered copper chalcogenides ${Cu}_{2} X$ family $(X = S, Se, Te)$ has attracted tremendous research interests due to their high thermoelectric performance, which is partly due to the superionic behavior of mobile Cu ions, making these compounds “phonon liquids.” Here, we systematically investigate the electronic structure and its temperature evolution of the less studied single crystal ${Cu}_{2 - x} Te$ by the combination of angle resolved photoemission spectroscopy (ARPES) and scanning tunneling microscope/spectroscopy (STM/STS) experiments. While the band structure of the ${Cu}_{2 - x} Te$ shows agreement with the calculations, we clearly observe a $2 \times 2$ surface reconstruction from both our low temperature ARPES and STM/STS experiments which survives up to room temperature. Interestingly, our low temperature STM experiments further reveal multiple types of reconstruction patterns, which suggests the origin of the surface reconstruction being the distributed deficiency of liquidlike Cu ions. Our findings reveal the electronic structure and impurity level of ${Cu}_{2} Te$ , which provides knowledge about its thermoelectric properties from the electronic degree of freedom.
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- 15 March 2021
- Published by American Physical Society (APS) in Physical Review B
Measurement of electronic structure and surface reconstruction in the superionic ${Cu}_{2 - x} Te$
by S. Liu, W. Xia, K. Huang, D. Pei, T. Deng, A. J. Liang, J. Jiang, H. F. Yang, J. Zhang, H. J. Zheng, et al.
Recently, layered copper chalcogenides ${Cu}_{2} X$ family $(X = S, Se, Te)$ has attracted tremendous research interests due to their high thermoelectric performance, which is partly due to the superionic behavior of mobile Cu ions, making these compounds “phonon liquids.” Here, we systematically investigate the electronic structure and its temperature evolution of the less studied single crystal ${Cu}_{2 - x} Te$ by the combination of angle resolved photoemission spectroscopy (ARPES) and scanning tunneling microscope/spectroscopy (STM/STS) experiments. While the band structure of the ${Cu}_{2 - x} Te$ shows agreement with the calculations, we clearly observe a $2 \times 2$ surface reconstruction from both our low temperature ARPES and STM/STS experiments which survives up to room temperature. Interestingly, our low temperature STM experiments further reveal multiple types of reconstruction patterns, which suggests the origin of the surface reconstruction being the distributed deficiency of liquidlike Cu ions. Our findings reveal the electronic structure and impurity level of ${Cu}_{2} Te$ , which provides knowledge about its thermoelectric properties from the electronic degree of freedom.
Cited by 10
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Cited by 20
- 9 November 2020
- Published by AIP Publishing in Applied Physics Letters
Rapid Kerr imaging characterization of the magnetic properties of two-dimensional ferromagnetic Fe3GeTe2
by Li Cai, Chenglin Yu, Liangyang Liu, Wei Xia, Heng-An Zhou, Le Zhao, Yiqing Dong, Teng Xu, Zidong Wang, Yanfeng Guo, et al.
Van der Waals (vdW) ferromagnetic materials have attracted considerable attention in the nanomaterial community, which could provide a unique platform to study magnetism at the nanoscale. Along this direction, many interesting results have been reported, including the electric field control of magnetism and topological spin textures. In this report, we present a rapid and spatially resolved imaging method to study the dimensionality-dependent magnetic properties of Fe₃GeTe₂ (FGT) nanoflakes. Our method is named as polar magneto-optical Kerr imaging microscopy magnetometry (p-MIMM), which is made possible by analyzing the intensity evolution of wide-field polar magneto-optical Kerr effect (MOKE) images that were collected by varying magnetic fields, thicknesses, and temperatures. In particular, spatially resolved MOKE hysteresis loops can be acquired in the FGT nanoflakes with a submicrometer resolution. By analyzing the evolution of the relative (saturated) MOKE intensity as a function of temperature, we further study the critical exponent and universality class and its dependence on the FGT nanoflake thickness. Combining the polar MOKE images with the calculated MOKE hysteresis loops, a detailed magnetic phase diagram summarizing an evolution of the stripe domain, single domain, and paramagnetic state is further validated. Our results suggest that the wide-field p-MIMM can be conveniently used for rapidly examining the magnetic properties of versatile vdW magnetic materials.
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- 9 November 2020
- Published by AIP Publishing in Applied Physics Letters
Rapid Kerr imaging characterization of the magnetic properties of two-dimensional ferromagnetic Fe3GeTe2
by Li Cai, Chenglin Yu, Liangyang Liu, Wei Xia, Heng-An Zhou, Le Zhao, Yiqing Dong, Teng Xu, Zidong Wang, Yanfeng Guo, et al.
Van der Waals (vdW) ferromagnetic materials have attracted considerable attention in the nanomaterial community, which could provide a unique platform to study magnetism at the nanoscale. Along this direction, many interesting results have been reported, including the electric field control of magnetism and topological spin textures. In this report, we present a rapid and spatially resolved imaging method to study the dimensionality-dependent magnetic properties of Fe₃GeTe₂ (FGT) nanoflakes. Our method is named as polar magneto-optical Kerr imaging microscopy magnetometry (p-MIMM), which is made possible by analyzing the intensity evolution of wide-field polar magneto-optical Kerr effect (MOKE) images that were collected by varying magnetic fields, thicknesses, and temperatures. In particular, spatially resolved MOKE hysteresis loops can be acquired in the FGT nanoflakes with a submicrometer resolution. By analyzing the evolution of the relative (saturated) MOKE intensity as a function of temperature, we further study the critical exponent and universality class and its dependence on the FGT nanoflake thickness. Combining the polar MOKE images with the calculated MOKE hysteresis loops, a detailed magnetic phase diagram summarizing an evolution of the stripe domain, single domain, and paramagnetic state is further validated. Our results suggest that the wide-field p-MIMM can be conveniently used for rapidly examining the magnetic properties of versatile vdW magnetic materials.
Cited by 20
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Cited by 23
- 15 April 2020
- Published by American Physical Society (APS) in Physical Review B
Bulk Fermi surface of the layered superconductor $TaS e_{3}$ with three-dimensional strong topological state
by Wei Xia, Xianbiao Shi, Yong Zhang, Hao Su, Qin Wang, Linchao Ding, Leiming Chen, Xia Wang, Zhiqiang Zou, Na Yu, et al.
High-magnetic-field transport measurements and ab initio calculations on the layered superconductor $TaS e_{3}$ have provided evidence for the existence of a three-dimensional strong topological state. Longitudinal magnetotransport measurements up to ∼33 T unveiled striking Shubnikov–de Haas oscillations with two fundamental frequencies at 100 and 175 T corresponding to a nontrivial hole Fermi pocket at the Γ point and a nontrivial electron Fermi pocket at the B point, respectively, in the Brillouin zone. However, calculations revealed one more electron pocket at the B point which was not detected by the magnetotransport measurements, presumably due to the limited carrier momentum relaxation time. Angle-dependent quantum oscillations by rotating the sample with respect to the magnetic field revealed clear changes in the two fundamental frequencies, indicating anisotropic electronic Fermi pockets. The ab initio calculations gave the topological $Z_{2}$ invariant of (1; 100) and revealed a single Dirac cone on the $(1 0 - 1)$ surface at the $\bar{X}$ point with helical spin texture at a constant energy contour, suggesting a strong topological state. The results demonstrate $TaS e_{3}$ as an excellent platform to study the interplay between the topological phase and superconductivity and a promising system for the exploration of topological superconductivity.
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- 15 April 2020
- Published by American Physical Society (APS) in Physical Review B
Bulk Fermi surface of the layered superconductor $TaS e_{3}$ with three-dimensional strong topological state
by Wei Xia, Xianbiao Shi, Yong Zhang, Hao Su, Qin Wang, Linchao Ding, Leiming Chen, Xia Wang, Zhiqiang Zou, Na Yu, et al.
High-magnetic-field transport measurements and ab initio calculations on the layered superconductor $TaS e_{3}$ have provided evidence for the existence of a three-dimensional strong topological state. Longitudinal magnetotransport measurements up to ∼33 T unveiled striking Shubnikov–de Haas oscillations with two fundamental frequencies at 100 and 175 T corresponding to a nontrivial hole Fermi pocket at the Γ point and a nontrivial electron Fermi pocket at the B point, respectively, in the Brillouin zone. However, calculations revealed one more electron pocket at the B point which was not detected by the magnetotransport measurements, presumably due to the limited carrier momentum relaxation time. Angle-dependent quantum oscillations by rotating the sample with respect to the magnetic field revealed clear changes in the two fundamental frequencies, indicating anisotropic electronic Fermi pockets. The ab initio calculations gave the topological $Z_{2}$ invariant of (1; 100) and revealed a single Dirac cone on the $(1 0 - 1)$ surface at the $\bar{X}$ point with helical spin texture at a constant energy contour, suggesting a strong topological state. The results demonstrate $TaS e_{3}$ as an excellent platform to study the interplay between the topological phase and superconductivity and a promising system for the exploration of topological superconductivity.
Cited by 23
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Cited by 17
- 6 April 2020
- Published by AIP Publishing in Applied Physics Letters
The de Haas-van Alphen quantum oscillations in a three-dimensional Dirac semimetal TiSb2
by Wei Xia, Xianbiao Shi, Yushu Wang, Wenna Ge, Hao Su, Qin Wang, Xia Wang, Na Yu, Zhiqiang Zou, Yufeng Hao, et al.
Characterization of the Fermi surface of high-quality crystalline TiSb₂ by de Hass-van Alphen measurement reveals nontrivial topological properties. Moreover, our analysis of the quantum oscillation frequencies associated with nonzero Berry phase when the magnetic field is parallel to both the ab-plane and c-axis of TiSb₂ finds that the Fermi surface topology has a three-dimensional feature. The results are supported by first-principle calculations which reveal a symmetry-protected Dirac point along the Γ-Z high symmetry line near the Fermi level. On the (001) surface, the bulk Dirac points are found to project onto the $\bar{Γ}$ point with nontrivial surface states. Our finding will substantially enrich the family of 3D Dirac semimetals which are useful for topological applications.
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- 6 April 2020
- Published by AIP Publishing in Applied Physics Letters
The de Haas-van Alphen quantum oscillations in a three-dimensional Dirac semimetal TiSb2
by Wei Xia, Xianbiao Shi, Yushu Wang, Wenna Ge, Hao Su, Qin Wang, Xia Wang, Na Yu, Zhiqiang Zou, Yufeng Hao, et al.
Characterization of the Fermi surface of high-quality crystalline TiSb₂ by de Hass-van Alphen measurement reveals nontrivial topological properties. Moreover, our analysis of the quantum oscillation frequencies associated with nonzero Berry phase when the magnetic field is parallel to both the ab-plane and c-axis of TiSb₂ finds that the Fermi surface topology has a three-dimensional feature. The results are supported by first-principle calculations which reveal a symmetry-protected Dirac point along the Γ-Z high symmetry line near the Fermi level. On the (001) surface, the bulk Dirac points are found to project onto the $\bar{Γ}$ point with nontrivial surface states. Our finding will substantially enrich the family of 3D Dirac semimetals which are useful for topological applications.
Cited by 17
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Cited by 14
- 18 March 2020
- Published by American Physical Society (APS) in Physical Review B
Three-dimensional and temperature-dependent electronic structure of the heavy-fermion compound ${CePt}_{2} {In}_{7}$ studied by angle-resolved photoemission spectroscopy
by Yang Luo, Chen Zhang, Qi-Yi Wu, Fan-Ying Wu, Jiao-Jiao Song, W. Xia, Yanfeng Guo, Ján Rusz, Peter M. Oppeneer, Tomasz Durakiewicz, et al.
The three-dimensional and temperature-dependent electronic structures of the heavy-fermion superconductor ${CePt}_{2} {In}_{7}$ are investigated. Angle-resolved photoemission spectroscopy using variable photon energy establishes the existence of quasi-two- and three-dimensional Fermi surface topologies. Temperature-dependent $4 d − 4 f$ on-resonance photoemission spectroscopies data reveal that heavy quasiparticle bands begin to form at a temperature well above the characteristic (coherence) temperature $T^{*}$ . The emergence of low-lying crystal electric field excitation may be responsible for the “relocalization” or the precursor to the establishment of heavy electrons coherence in heavy-fermion compounds. These findings provide critical insight into understanding the hybridization in heavy-fermion systems.
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- 18 March 2020
- Published by American Physical Society (APS) in Physical Review B
Open Access
Three-dimensional and temperature-dependent electronic structure of the heavy-fermion compound ${CePt}_{2} {In}_{7}$ studied by angle-resolved photoemission spectroscopy
by Yang Luo, Chen Zhang, Qi-Yi Wu, Fan-Ying Wu, Jiao-Jiao Song, W. Xia, Yanfeng Guo, Ján Rusz, Peter M. Oppeneer, Tomasz Durakiewicz, et al.
The three-dimensional and temperature-dependent electronic structures of the heavy-fermion superconductor ${CePt}_{2} {In}_{7}$ are investigated. Angle-resolved photoemission spectroscopy using variable photon energy establishes the existence of quasi-two- and three-dimensional Fermi surface topologies. Temperature-dependent $4 d − 4 f$ on-resonance photoemission spectroscopies data reveal that heavy quasiparticle bands begin to form at a temperature well above the characteristic (coherence) temperature $T^{*}$ . The emergence of low-lying crystal electric field excitation may be responsible for the “relocalization” or the precursor to the establishment of heavy electrons coherence in heavy-fermion compounds. These findings provide critical insight into understanding the hybridization in heavy-fermion systems.
Cited by 14
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Cited by 96
- 1 January 2020
- Published by AIP Publishing in APL Materials
Magnetic exchange induced Weyl state in a semimetal EuCd2Sb2
by Hao Su, Benchao Gong, Wujun Shi, Haifeng Yang, Hongyuan Wang, Wei Xia, Zhenhai Yu, Peng-Jie Guo, Jinhua Wang, Linchao Ding, et al.
Magnetic Weyl semimetals (WSMs) bearing long-time seeking are still very rare. We have identified herein that EuCd₂Sb₂, a semimetal belonging to the type IV magnetic space group, hosts a magnetic exchange induced Weyl state via performing high magnetic field magnetotransport measurements and ab initio calculations. In the A-type antiferromagnetic structure, the external field larger than 3.2 T can align all Eu spins to be fully polarized along the c-axis and consequently drive EuCd₂Sb₂ into a spin polarized state. Magnetotransport measurements up to ∼55–60 T showed striking Shubnikov-de Hass oscillations associated with a nontrivial Berry phase. The ab initio calculations unveiled a phase transition of EuCd₂Sb₂ from a small gap antiferromagnetic topological insulator to a spin polarized WSM in which the Weyl points emerge along the Γ-Z path. Fermi arcs on (100) and (010) surfaces are also predicted. Meanwhile, the observed large anomalous Hall effect indicates the existence of Weyl points around the Fermi level. The results pave a way toward the realization of various topological states in a single material through the magnetic exchange manipulation.
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- 1 January 2020
- Published by AIP Publishing in APL Materials
Open Access
Magnetic exchange induced Weyl state in a semimetal EuCd2Sb2
by Hao Su, Benchao Gong, Wujun Shi, Haifeng Yang, Hongyuan Wang, Wei Xia, Zhenhai Yu, Peng-Jie Guo, Jinhua Wang, Linchao Ding, et al.
Magnetic Weyl semimetals (WSMs) bearing long-time seeking are still very rare. We have identified herein that EuCd₂Sb₂, a semimetal belonging to the type IV magnetic space group, hosts a magnetic exchange induced Weyl state via performing high magnetic field magnetotransport measurements and ab initio calculations. In the A-type antiferromagnetic structure, the external field larger than 3.2 T can align all Eu spins to be fully polarized along the c-axis and consequently drive EuCd₂Sb₂ into a spin polarized state. Magnetotransport measurements up to ∼55–60 T showed striking Shubnikov-de Hass oscillations associated with a nontrivial Berry phase. The ab initio calculations unveiled a phase transition of EuCd₂Sb₂ from a small gap antiferromagnetic topological insulator to a spin polarized WSM in which the Weyl points emerge along the Γ-Z path. Fermi arcs on (100) and (010) surfaces are also predicted. Meanwhile, the observed large anomalous Hall effect indicates the existence of Weyl points around the Fermi level. The results pave a way toward the realization of various topological states in a single material through the magnetic exchange manipulation.
Cited by 96

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