Superconducting ground state study of the valence-skipped compound AgSnSe2
A. Kataria, Arushi, S. Sharma, T. Agarwal, M. Pula, J. Beare, S. Yoon, Y. Cai, K. M. Kojima, G. M. Luke, R. P. Singh
DOI 10.1103/PhysRevB.107.174517 · 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
Valence-skipped superconductors are natural candidates for unconventional superconductivity because they can exhibit a negative effective, attractive interaction for electron pairing. This work reports comprehensive x-ray diffraction, magnetization, specific heat, and muon spin rotation and relaxation measurements (μSR) on the valence-skipped compound AgSnSe2. The temperature dependences of the electronic specific heat [Cel(T)] and the upper critical field [Hc2(T)] provide evidence of two-gap superconductivity, which is also confirmed by our transverse-field μSR measurements. Zero-field μSR measurements reveal at most a slight increase [∼0.002(1)μs−1] in relaxation in the superconducting state, much less than reported in a range of superconductors with broken time-reversal symmetry. Further measurements with greatly improved statistics will be required to make a definitive determination of the possible presence of broken time-reversal symmetry.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| AgSnSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.91 | Pressure not reported | unknown |
| AgSnSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.74 | Pressure not reported | midpoint |
| AgSnSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.91 | Pressure not reported | unknown |
Similar papers
Superconductivity, valence skipping, and topological crystalline metallic phase in AgSnSe2
similarity 0.95Shubham Patel & A. Taraphder
Source status unknown — claims are unverified
Superconducting ground state study of valence skip compound AgSnSe
similarity 0.94A. Kataria et al. · 2023 · arXiv:2302.07790
Source status unknown — claims are unverified
Anomalous metallic state above the upper critical field of the conventional three-dimensional superconductor AgSnSe2 with strong intrinsic disorder
similarity 0.93Zhi Ren et al.
Source status unknown — claims are unverified
Superconductivity in the van der Waals layered compound PS2
similarity 0.91Yan-Ling Li et al.
Source status unknown — claims are unverified
Superconductivity in tin selenide under pressure
similarity 0.90Giovanni Marini et al.
Source status unknown — claims are unverified
Ab initio study of the PbTaSe2-related superconducting topological metals
similarity 0.90Peng-Jen Chen et al.
Source status unknown — claims are unverified