Michał Jurczyszyn
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Michał Jurczyszyn has a total of 25 co-authors. Here are the top co-authors by number of shared publications:
- Maciej Chrobak
Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, 30-059 Kraków, Poland
2 shared publications - Marcin Sikora
National Synchrotron Radiation Centre SOLARIS, Jagiellonian University, Czerwone Maki 98, PL-30392 Kraków, Poland
2 shared publications - A. Abaloszew
Institute of Physics, Polish Academy of Sciences
1 shared publication - Andrii Naumov
Academic Centre for Materials and Nanotechnology, AGH University of Krakow, Al. Mickiewicza 30, Krakow, 30-059, Poland
1 shared publication - Andrzej Kozlowski
AGH University of Krakow
1 shared publication Czesław Kapusta
AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Department of Solid State Physics, al. A. Mickiewicza 30, 30-059 Krakow, Poland
1 shared publication
Latest Publications
- Open Access
Influence of Doping on the Topological Surface States of Crystalline Bi2Se3 Topological Insulators
We present STM/STS, ARPES and magnetotransport studies of the surface topography and electronic structure of pristine Bi2Se3 in comparison to Bi1.96Mg0.04Se3 and Bi1.98Fe0.02Se3. The topography images reveal a large number of complex, triangle-shaped defects at the surface. The local electronic structure of both the defected and non-defected regions is examined by STS. The defect-related states shift together with the Dirac point observed in the undefected area, suggesting that the local electronic structure at the defects is influenced by doping in the same way as the electronic structure of the undefected surface. Additional information about the electronic structure of the samples is provided by ARPES, which reveals the dependence of the bulk and surface electronic bands on doping, including such parameters as the Fermi wave vector. The subtle changes of the surface electronic structure by doping are verified with magneto-transport measurements at low temperatures (200 mK) allowing the detection of Shubnikov-de Haas (SdH) quantum oscillations.
Open AccessInfluence of Doping on the Topological Surface States of Crystalline Bi2Se3 Topological Insulators
We present STM/STS, ARPES and magnetotransport studies of the surface topography and electronic structure of pristine Bi2Se3 in comparison to Bi1.96Mg0.04Se3 and Bi1.98Fe0.02Se3. The topography images reveal a large number of complex, triangle-shaped defects at the surface. The local electronic structure of both the defected and non-defected regions is examined by STS. The defect-related states shift together with the Dirac point observed in the undefected area, suggesting that the local electronic structure at the defects is influenced by doping in the same way as the electronic structure of the undefected surface. Additional information about the electronic structure of the samples is provided by ARPES, which reveals the dependence of the bulk and surface electronic bands on doping, including such parameters as the Fermi wave vector. The subtle changes of the surface electronic structure by doping are verified with magneto-transport measurements at low temperatures (200 mK) allowing the detection of Shubnikov-de Haas (SdH) quantum oscillations.
- 8 December 2021
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 35 (1) , 015009
Current–voltage characteristics of strained, highly underdoped La 2 − x Sr x CuO4 thin films
The temperature dependence of resistance and of current–voltage characteristics I − V are studied for two underdoped La1.952Sr0.048CuO4 films with different thickness and different degrees of built-in compressive strain. Strain induces an inhomogeneous superconducting (SC) state in the films, with two-step SC transition, consistent with the presence of SC islands coupled by the proximity effect. On further cooling, superfluid density is suppressed and global phase coherence is never reached. Instead, a reentrant increase of resistance appears, reaching several orders of magnitude in the thinner, more strongly strained film, and saturating at lowest temperatures. The saturation is accompanied by Coulomb blockade, which resembles the blockade reported for Josephson junction (JJ) arrays. However, increasing magnetic field quickly diminishes the influence of Coulomb blockade on transport, which is distinct from the behavior observed for JJ arrays. The observation of Coulomb blockade indicates that Cooper pairs survive in the insulating state, suggesting the local character of pairing.
- 8 December 2021
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 35 (1) , 015009
Current–voltage characteristics of strained, highly underdoped La 2 − x Sr x CuO4 thin films
The temperature dependence of resistance and of current–voltage characteristics I − V are studied for two underdoped La1.952Sr0.048CuO4 films with different thickness and different degrees of built-in compressive strain. Strain induces an inhomogeneous superconducting (SC) state in the films, with two-step SC transition, consistent with the presence of SC islands coupled by the proximity effect. On further cooling, superfluid density is suppressed and global phase coherence is never reached. Instead, a reentrant increase of resistance appears, reaching several orders of magnitude in the thinner, more strongly strained film, and saturating at lowest temperatures. The saturation is accompanied by Coulomb blockade, which resembles the blockade reported for Josephson junction (JJ) arrays. However, increasing magnetic field quickly diminishes the influence of Coulomb blockade on transport, which is distinct from the behavior observed for JJ arrays. The observation of Coulomb blockade indicates that Cooper pairs survive in the insulating state, suggesting the local character of pairing.
- 16 November 2020
- Published by American Physical Society (APS) in Physical Review B
- Vol. 102 (19) , 195126
Direct evidence of uneven and orbital occupation in the superconducting state of iron pnictideThe origin of nematicity and its relation to superconductivity in iron pnictide high-temperature superconductors remains unclear. One of its possible sources is the uneven occupation of Fe and orbitals. Here, by using x-ray linear dichroism technique, we show that such an imbalance is present in single crystals deep in the tetragonal phase and also in the superconducting state, where we find that the orbital has a higher occupation as indicated by an x-ray linear dichroism magnitude of 1.5%. Our result shows the importance of orbital polarization in the theoretical description of nematicity and superconductivity, particularly for determination of the superconducting gap symmetry, which is affected by orbital fluctuations.- 16 November 2020
- Published by American Physical Society (APS) in Physical Review B
- Vol. 102 (19) , 195126
Direct evidence of uneven and orbital occupation in the superconducting state of iron pnictideThe origin of nematicity and its relation to superconductivity in iron pnictide high-temperature superconductors remains unclear. One of its possible sources is the uneven occupation of Fe and orbitals. Here, by using x-ray linear dichroism technique, we show that such an imbalance is present in single crystals deep in the tetragonal phase and also in the superconducting state, where we find that the orbital has a higher occupation as indicated by an x-ray linear dichroism magnitude of 1.5%. Our result shows the importance of orbital polarization in the theoretical description of nematicity and superconductivity, particularly for determination of the superconducting gap symmetry, which is affected by orbital fluctuations.