Mark P. Zic

Stanford University

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Mark P. Zic has a total of 34 co-authors. Here are the top co-authors by number of shared publications:

Ian Randal Fisher
Stanford University
3 shared publications
Johnpierre Paglione
University of Maryland, College Park
2 shared publications
Nicholas Patrick Butch
NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, USA
2 shared publications
Sheng Ran
Department of Physics, Washington University in St. Louis, St. Louis, USA
2 shared publications
Yuntian Li
Geballe Laboratory for Advanced Materials, Stanford University
2 shared publications
Ashvini Vallipuram
Université de Sherbrooke
1 shared publication

Latest Publications

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Cited by 1
- 22 July 2026
- Published by National Academy of Sciences in Proceedings of the National Academy of Sciences
Electro-nuclear quantum phase transition in TmVO ₄
by Mark P. Zic, Chao Huan, Nicolas Silva, Yuntian Li, Mark W. Meisel, Ian R. Fisher
Hyperfine interactions couple nuclear and electronic degrees of freedom. The present work explores how hyperfine coupling within the Tm ions in TmVO ₄ single crystals affects an electronic ferroquadrupole ordered ground state and its associated field-tuned quantum phase transition. As temperature is progressively reduced through the hyperfine energy scale, the nuclear moments reduce the critical field for the electronic order, resulting in a dramatic back-bending of the phase boundary delineating the ferroquadrupole order. This behavior is well described by a single-ion semiclassical mean-field model down to approximately 50 mK. Analysis of the effective Hamiltonian leads to a prediction of spontaneous nuclear magnetic order mediated by 4 f electrons, which in principle persists with the application of orthogonal antisymmetric strain, yielding a proposed electro-nuclear tetracritical point.
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- 22 July 2026
- Published by National Academy of Sciences in Proceedings of the National Academy of Sciences
Open Access
Electro-nuclear quantum phase transition in TmVO ₄
by Mark P. Zic, Chao Huan, Nicolas Silva, Yuntian Li, Mark W. Meisel, Ian R. Fisher
Hyperfine interactions couple nuclear and electronic degrees of freedom. The present work explores how hyperfine coupling within the Tm ions in TmVO ₄ single crystals affects an electronic ferroquadrupole ordered ground state and its associated field-tuned quantum phase transition. As temperature is progressively reduced through the hyperfine energy scale, the nuclear moments reduce the critical field for the electronic order, resulting in a dramatic back-bending of the phase boundary delineating the ferroquadrupole order. This behavior is well described by a single-ion semiclassical mean-field model down to approximately 50 mK. Analysis of the effective Hamiltonian leads to a prediction of spontaneous nuclear magnetic order mediated by 4 f electrons, which in principle persists with the application of orthogonal antisymmetric strain, yielding a proposed electro-nuclear tetracritical point.
Cited by 1
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Cited by 23
- 23 July 2024
- Published by American Physical Society (APS) in Physical Review B
Role of magnetic ions in the thermal Hall effect of the paramagnetic insulator ${TmVO}_{4}$
by Ashvini Vallipuram, Lu Chen, Emma Campillo, Manel Mezidi, Gaël Grissonnanche, Marie-Eve Boulanger, Étienne Lefrançois, Mark P. Zic, Yuntian Li, Ian R. Fisher, et al.
In a growing number of materials, phonons have been found to generate a thermal Hall effect, but the underlying mechanism remains unclear. Inspired by previous studies that revealed the importance of ${Tb}^{3 +}$ ions in generating the thermal Hall effect in a family of pyrochlores, we investigated the role of ${Tm}^{3 +}$ ions in ${TmVO}_{4}$ , a paramagnetic insulator with a different crystal structure. We observe a negative thermal Hall conductivity in ${TmVO}_{4}$ with a magnitude such that the Hall angle, $| κ_{x y} / κ_{x x} |$ , is approximately $1 \times 10^{- 3}$ at $H$ = 15 T and $T$ = 20 K, typical for a phonon-generated thermal Hall effect. In contrast to the negligible $κ_{x y}$ found in the nonmagnetic pyrochlore analog (where the ${Tb}^{3 +}$ ions are replaced with $Y^{3 +}$ ), we observe a negative $κ_{x y}$ in ${YVO}_{4}$ with a Hall angle of magnitude comparable to that of ${TmVO}_{4}$ . This shows that the ${Tm}^{3 +}$ ions are not essential for the thermal Hall effect in this family of materials. Interestingly, at an intermediate Y concentration of $x = 0.3$ in ${Tm}_{1 - x} Y_{x} {VO}_{4}, κ_{x y}$ was found to have a positive sign, pointing to the importance of impurities in the thermal Hall effect of phonons.
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- 23 July 2024
- Published by American Physical Society (APS) in Physical Review B
Role of magnetic ions in the thermal Hall effect of the paramagnetic insulator ${TmVO}_{4}$
by Ashvini Vallipuram, Lu Chen, Emma Campillo, Manel Mezidi, Gaël Grissonnanche, Marie-Eve Boulanger, Étienne Lefrançois, Mark P. Zic, Yuntian Li, Ian R. Fisher, et al.
In a growing number of materials, phonons have been found to generate a thermal Hall effect, but the underlying mechanism remains unclear. Inspired by previous studies that revealed the importance of ${Tb}^{3 +}$ ions in generating the thermal Hall effect in a family of pyrochlores, we investigated the role of ${Tm}^{3 +}$ ions in ${TmVO}_{4}$ , a paramagnetic insulator with a different crystal structure. We observe a negative thermal Hall conductivity in ${TmVO}_{4}$ with a magnitude such that the Hall angle, $| κ_{x y} / κ_{x x} |$ , is approximately $1 \times 10^{- 3}$ at $H$ = 15 T and $T$ = 20 K, typical for a phonon-generated thermal Hall effect. In contrast to the negligible $κ_{x y}$ found in the nonmagnetic pyrochlore analog (where the ${Tb}^{3 +}$ ions are replaced with $Y^{3 +}$ ), we observe a negative $κ_{x y}$ in ${YVO}_{4}$ with a Hall angle of magnitude comparable to that of ${TmVO}_{4}$ . This shows that the ${Tm}^{3 +}$ ions are not essential for the thermal Hall effect in this family of materials. Interestingly, at an intermediate Y concentration of $x = 0.3$ in ${Tm}_{1 - x} Y_{x} {VO}_{4}, κ_{x y}$ was found to have a positive sign, pointing to the importance of impurities in the thermal Hall effect of phonons.
Cited by 23
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Cited by 9
- 13 June 2024
- Published by National Academy of Sciences in Proceedings of the National Academy of Sciences
Giant elastocaloric effect at low temperatures in TmVO ₄ and implications for cryogenic cooling
by Mark P. Zic, Matthias S. Ikeda, Pierre Massat, Patrick M. Hollister, Linda Ye, Elliott W. Rosenberg, Joshua A. W. Straquadine, Yuntian Li, B. J. Ramshaw, Ian R. Fisher
Adiabatic decompression of paraquadrupolar materials has significant potential as a cryogenic cooling technology. We focus on TmVO 4 , an archetypal material that undergoes a continuous phase transition to a ferroquadrupole-ordered state at 2.15 K. Above the phase transition, each Tm ion contributes an entropy of k B ln 2 due to the degeneracy of the crystal electric field groundstate. Owing to the large magnetoelastic coupling, which is a prerequisite for a material to undergo a phase transition via the cooperative Jahn–Teller effect, this level splitting, and hence the entropy, can be readily tuned by externally induced strain. Using a dynamic technique in which the strain is rapidly oscillated, we measure the adiabatic elastocaloric response of single-crystal TmVO 4 , and thus experimentally obtain the entropy landscape as a function of strain and temperature. The measurement confirms the suitability of this class of materials for cryogenic cooling applications and provides insight into the dynamic quadrupole strain susceptibility.
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- 13 June 2024
- Published by National Academy of Sciences in Proceedings of the National Academy of Sciences
Open Access
Giant elastocaloric effect at low temperatures in TmVO ₄ and implications for cryogenic cooling
by Mark P. Zic, Matthias S. Ikeda, Pierre Massat, Patrick M. Hollister, Linda Ye, Elliott W. Rosenberg, Joshua A. W. Straquadine, Yuntian Li, B. J. Ramshaw, Ian R. Fisher
Adiabatic decompression of paraquadrupolar materials has significant potential as a cryogenic cooling technology. We focus on TmVO 4 , an archetypal material that undergoes a continuous phase transition to a ferroquadrupole-ordered state at 2.15 K. Above the phase transition, each Tm ion contributes an entropy of k B ln 2 due to the degeneracy of the crystal electric field groundstate. Owing to the large magnetoelastic coupling, which is a prerequisite for a material to undergo a phase transition via the cooperative Jahn–Teller effect, this level splitting, and hence the entropy, can be readily tuned by externally induced strain. Using a dynamic technique in which the strain is rapidly oscillated, we measure the adiabatic elastocaloric response of single-crystal TmVO 4 , and thus experimentally obtain the entropy landscape as a function of strain and temperature. The measurement confirms the suitability of this class of materials for cryogenic cooling applications and provides insight into the dynamic quadrupole strain susceptibility.
Cited by 9
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Cited by 14
- 6 July 2021
- Published by AIP Publishing in Journal of Applied Physics
Coupled spin waves and crystalline electric field levels in candidate multiferroic ErFeO3
by Mark P. Zic, Wesley T. Fuhrman, Kefeng Wang, Sheng Ran, Johnpierre Paglione, Nicholas P. Butch
We report an inelastic neutron scattering study of candidate multiferroic ${ErFeO}_{3}$ , a compound that has been previously reported to have three different magnetic states and undergoes signatures of ${Fe}^{3 +} {- Er}^{3 +}$ cooperative coupling. The spectrum at low energy transfer is dominated by excitations of the ${Er}^{3 +}$ character, even above the ${Er}^{3 +}$ antiferromagnetic ordering temperature of 4.5 K. In addition, a crystalline electric field excitation at 6 meV exhibits additional energy splitting upon cooling through 4.5 K with mode-dependent polarization. This indicates different moment directions for these modes, an interesting consequence of $C_{y}$ ordering of the ${Er}^{3 +}$ moments.
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- 6 July 2021
- Published by AIP Publishing in Journal of Applied Physics
Coupled spin waves and crystalline electric field levels in candidate multiferroic ErFeO3
by Mark P. Zic, Wesley T. Fuhrman, Kefeng Wang, Sheng Ran, Johnpierre Paglione, Nicholas P. Butch
We report an inelastic neutron scattering study of candidate multiferroic ${ErFeO}_{3}$ , a compound that has been previously reported to have three different magnetic states and undergoes signatures of ${Fe}^{3 +} {- Er}^{3 +}$ cooperative coupling. The spectrum at low energy transfer is dominated by excitations of the ${Er}^{3 +}$ character, even above the ${Er}^{3 +}$ antiferromagnetic ordering temperature of 4.5 K. In addition, a crystalline electric field excitation at 6 meV exhibits additional energy splitting upon cooling through 4.5 K with mode-dependent polarization. This indicates different moment directions for these modes, an interesting consequence of $C_{y}$ ordering of the ${Er}^{3 +}$ moments.
Cited by 14
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Cited by 903
- 16 August 2019
- Published by American Association for the Advancement of Science (AAAS) in Science
Nearly ferromagnetic spin-triplet superconductivity
by Sheng Ran, Chris Eckberg, Qing-Ping Ding, Yuji Furukawa, Tristin Metz, Shanta R. Saha, I-Lin Liu, Mark Zic, Hyunsoo Kim, Johnpierre Paglione, et al.
An unusual superconductor: In conventional, and in many unconventional, superconductors, the electrons that form Cooper pairs have spins pointing in opposite directions. An applied magnetic field can easily “break” such pairs—and destroy superconductivity—by aligning both spins in the same direction. In contrast, spin-triplet superconductors are much more resilient to magnetic fields. Very few candidates for such materials have been discovered. Ran et al. add to this select group by observing signatures of spin-triplet superconductivity, including a very large and anisotropic upper critical magnetic field, in the material UTe ₂ . Because spin-triplet superconductors may naturally exhibit topological superconductivity, this material may also be of interest in quantum computing. Science , this issue p. 684
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- 16 August 2019
- Published by American Association for the Advancement of Science (AAAS) in Science
Top Cited Papers
Nearly ferromagnetic spin-triplet superconductivity
by Sheng Ran, Chris Eckberg, Qing-Ping Ding, Yuji Furukawa, Tristin Metz, Shanta R. Saha, I-Lin Liu, Mark Zic, Hyunsoo Kim, Johnpierre Paglione, et al.
An unusual superconductor: In conventional, and in many unconventional, superconductors, the electrons that form Cooper pairs have spins pointing in opposite directions. An applied magnetic field can easily “break” such pairs—and destroy superconductivity—by aligning both spins in the same direction. In contrast, spin-triplet superconductors are much more resilient to magnetic fields. Very few candidates for such materials have been discovered. Ran et al. add to this select group by observing signatures of spin-triplet superconductivity, including a very large and anisotropic upper critical magnetic field, in the material UTe ₂ . Because spin-triplet superconductors may naturally exhibit topological superconductivity, this material may also be of interest in quantum computing. Science , this issue p. 684
Cited by 903