Nodeless superconducting gap in the topological superconductor candidate 2M-WS2

doi:10.1103/PhysRevB.102.024523

SIC OpenIR

	Nodeless superconducting gap in the topological superconductor candidate 2M-WS2
	Wang, LS; Fang, YQ; Huang, YY; Cheng, EJ; Ni, JM; Pan, BL; Xu, Y; Huang, FQ; Li, SY
	2020-07-30
Source Publication	PHYSICAL REVIEW B
ISSN	2469-9950
Issue	2
Subtype	Article
Abstract	Recently, a new transition-metal dichalcogenide (TMD) material 2M-phase WS2 was synthesized. The material 2M-WS2 not only exhibits superconductivity, with the highest T-c being 8.8 K at ambient pressure among TMDs, but also hosts a topological surface state. Here we report the low-temperature thermal conductivity measurements on 2M-WS2 single crystals to investigate its superconducting gap structure. A negligible residual linear term kappa(0)/T in zero field shows that 2M-WS2 has a fully superconducting gap with all electrons paired. The field dependence of kappa(0)/T suggests an anisotropic superconducting gap or multiple nodeless superconducting gaps in 2M-WS2. Such a fully gapped superconducting state is compatible with 2M-WS2 being a topological superconductor candidate.
DOI	10.1103/PhysRevB.102.024523
WOS Keyword	STATE
Language	英语
WOS Research Area	Materials Science ; Physics
Publisher	AMER PHYSICAL SOC
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27881
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Wang, LS,Fang, YQ,Huang, YY,et al. Nodeless superconducting gap in the topological superconductor candidate 2M-WS2[J]. PHYSICAL REVIEW B,2020(2).
APA	Wang, LS.,Fang, YQ.,Huang, YY.,Cheng, EJ.,Ni, JM.,...&Li, SY.(2020).Nodeless superconducting gap in the topological superconductor candidate 2M-WS2.PHYSICAL REVIEW B(2).
MLA	Wang, LS,et al."Nodeless superconducting gap in the topological superconductor candidate 2M-WS2".PHYSICAL REVIEW B .2(2020).

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