Observation of two-level critical-state in the van-der-Waals superconductor Pt(Bi1−xSex)2
Y. Samukawa, M. Maeda, N. Jiang, R. Nakamura, M. Watanabe, K. Takaki, Y. Moriyasu, T. Ikushima, T. Kida, M. Hagiwara, T. Nakamura, Y. Okada, K. Kudo, Y. Niimi
DOI 10.1103/PhysRevB.111.064506 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Trigonal PtBi2 is one of the attractive van-der-Waals materials because of the enhancement of its superconducting transition temperature Tc by doping chalcogen elements such as Se and Te. Recently, it has been reported that Tc of Pt(Bi1−xSex)2 is enhanced by a factor of four, compared to the pristine PtBi2, together with the polar-nonpolar structural phase transition. Thus, it is desirable to study electrical transport properties of this new superconducting compound. Here, we have performed magnetotransport measurements on Pt(Bi1−xSex)2 (x=0.06 and 0.08) thin-film devices and observed a peculiar magnetoresistance, where a finite hysteresis appears when the superconducting state is broken. By measuring the magnetoresistance systematically, we have attributed this behavior to the two-level critical state where fluxons pinned in Pt(Bi1−xSex)2 play an important role.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pt(Bi1-xSex)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.2 | Pressure not reported | onset |
| Pt(Bi1-xSex)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.4 | Pressure not reported | unknown |
| PtBi2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.6 | Pressure not reported | unknown |
Similar papers
Electronic structure of the surface-superconducting Weyl semimetal PtBi2
similarity 0.93Riccardo Vocaturo et al.
Source status unknown — claims are unverified
Zero-field superconducting diode effect induced by magnetic flux in the van der Waals trigonal superconductor PtBi2
similarity 0.92Nan Jiang et al.
Source status unknown — claims are unverified
Spin-orbital ground states of superconducting doped topological insulators: A Majorana platform
similarity 0.91L. Andrew Wray et al.
Source status unknown — claims are unverified
Phonon-mediated intrinsic topological superconductivity in Fermi arcs
similarity 0.90Kristian Mæland et al.
Source status unknown — claims are unverified
Direct Observation of the Surface Superconducting Gap in the Topological Superconductor Candidate β−PdBi2
similarity 0.90Akifumi Mine et al.
Source status unknown — claims are unverified
Dirac fermions in the layered titanium-based oxypnictide superconductor BaTi2Bi2O
similarity 0.90Xianbiao Shi et al.
Source status unknown — claims are unverified