Quasi-two-dimensional superconductivity in topological nodal-line semimetal SnTaS2 nanoflakes
Ankang Zhu, Mengcheng Zhu, Yong Nie, Minglong Han, Liang Li, Xue Liu, Xuegang Chen, Yuyan Han, Wenshuai Gao, Mingliang Tian
DOI 10.1103/PhysRevB.110.115430 · Physical Review B
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Abstract
Spontaneous symmetry breaking in topological matter has emerged as a pivotal concept in describing phase transitions within condensed-matter physics. Of particular interest is the Berezinskii-Kosterlitz-Thouless (BKT) transition observed in two-dimensional superconductors. Here, we present comprehensive transport experiments on a nanoflake of the topological nodal-line semimetal SnTaS2 with a thickness of about 37 nm, revealing its hosting of a superconducting state with an onset transition temperature of 2.7 K. Temperature-dependent upper critical fields reveal an anisotropic superconductivity. Angle-dependent magnetotransport and the BKT transition confirm quasi-two-dimensional superconductivity in the SnTaS2 nanoflake. Given the presence of spin-polarized surface states in SnTaS2, these findings establish a novel platform for exploring topological superconductivity and Majorana modes.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SnTaS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.7 | Pressure not reported | onset |
| SnTaS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3 | Pressure not reported | unknown |
| PbTaSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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