Superconductivity in a Misfit Phase That Combines the Topological Crystalline Insulator Pb1-xSnxSe with the CDW-Bearing Transition Metal Dichalcogenide TiSe2
Abstract
We report the characterization of the misfit compound (Pb1-xSnxSe2)1.16(TiSe2)2 for 0 ≤ x ≤ 0.6, in which a [100] rocksalt-structure bilayer of Pb1-xSnxSe, which is a topological crystalline insulator in bulk form, alternates with a double layer of the normally nonsuperconducting transition metal dichalcogenide TiSe2. The x dependence of Tc displays a weak dome-like shape with a maximum Tc of 4.5 K at x = 0.2; there is only a subtle change in Tc at the composition where the trivial to topological transition occurs in bulk Pb1-xSnxSe. We present the characterization of the superconductor at x = 0.4, for which the bulk Pb1-xSnxSe phase is in the topological crystalline insulator regime. For this material, the Sommerfeld parameter γ = 11.06 mJ mol-1 K-2, the Debye temperature ΘD = 161 K, the normalized specific heat jump value ΔC/γTc = 1.38 and the electron-phonon constant value γep = 0.72, suggesting that (Pb0.6Sn0.4Se)1.16(TiSe2)2 is a BCS-type weak coupling superconductor. This material may be of interest for probing the interaction of superconductivity with the surface states of a topological crystalline insulator.
- Authors:
-
- Princeton Univ., NJ (United States)
- Brown Univ., Providence, RI (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Princeton Univ., NJ (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1303012
- Report Number(s):
- BNL-112487-2016-JA
Journal ID: ISSN 0031-9015; R&D Project: PO016; KC0202020
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the Physical Society of Japan
- Additional Journal Information:
- Journal Volume: 85; Journal Issue: 6; Journal ID: ISSN 0031-9015
- Publisher:
- Physical Society of Japan
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Topological insulator; Transition Metal Dichalcogenide; Superconductivity; Misfit phase
Citation Formats
Luo, H., Yan, K., Pletikosic, I., Xie, W., Phelan, B. F., Valla, T., and Cava, R. J. Superconductivity in a Misfit Phase That Combines the Topological Crystalline Insulator Pb1-xSnxSe with the CDW-Bearing Transition Metal Dichalcogenide TiSe2. United States: N. p., 2016.
Web. doi:10.7566/JPSJ.85.064705.
Luo, H., Yan, K., Pletikosic, I., Xie, W., Phelan, B. F., Valla, T., & Cava, R. J. Superconductivity in a Misfit Phase That Combines the Topological Crystalline Insulator Pb1-xSnxSe with the CDW-Bearing Transition Metal Dichalcogenide TiSe2. United States. https://doi.org/10.7566/JPSJ.85.064705
Luo, H., Yan, K., Pletikosic, I., Xie, W., Phelan, B. F., Valla, T., and Cava, R. J. Fri .
"Superconductivity in a Misfit Phase That Combines the Topological Crystalline Insulator Pb1-xSnxSe with the CDW-Bearing Transition Metal Dichalcogenide TiSe2". United States. https://doi.org/10.7566/JPSJ.85.064705. https://www.osti.gov/servlets/purl/1303012.
@article{osti_1303012,
title = {Superconductivity in a Misfit Phase That Combines the Topological Crystalline Insulator Pb1-xSnxSe with the CDW-Bearing Transition Metal Dichalcogenide TiSe2},
author = {Luo, H. and Yan, K. and Pletikosic, I. and Xie, W. and Phelan, B. F. and Valla, T. and Cava, R. J.},
abstractNote = {We report the characterization of the misfit compound (Pb1-xSnxSe2)1.16(TiSe2)2 for 0 ≤ x ≤ 0.6, in which a [100] rocksalt-structure bilayer of Pb1-xSnxSe, which is a topological crystalline insulator in bulk form, alternates with a double layer of the normally nonsuperconducting transition metal dichalcogenide TiSe2. The x dependence of Tc displays a weak dome-like shape with a maximum Tc of 4.5 K at x = 0.2; there is only a subtle change in Tc at the composition where the trivial to topological transition occurs in bulk Pb1-xSnxSe. We present the characterization of the superconductor at x = 0.4, for which the bulk Pb1-xSnxSe phase is in the topological crystalline insulator regime. For this material, the Sommerfeld parameter γ = 11.06 mJ mol-1 K-2, the Debye temperature ΘD = 161 K, the normalized specific heat jump value ΔC/γTc = 1.38 and the electron-phonon constant value γep = 0.72, suggesting that (Pb0.6Sn0.4Se)1.16(TiSe2)2 is a BCS-type weak coupling superconductor. This material may be of interest for probing the interaction of superconductivity with the surface states of a topological crystalline insulator.},
doi = {10.7566/JPSJ.85.064705},
journal = {Journal of the Physical Society of Japan},
number = 6,
volume = 85,
place = {United States},
year = {Fri May 13 00:00:00 EDT 2016},
month = {Fri May 13 00:00:00 EDT 2016}
}
Web of Science
Works referencing / citing this record:
Superconductivity in a misfit layered compound (SnSe) 1.16 (NbSe 2 )
journal, August 2018
- Bai, Hua; Yang, Xiaohui; Liu, Yi
- Journal of Physics: Condensed Matter, Vol. 30, Issue 35
Superconductivity in a misfit compound (PbSe) 1.12 (TaSe 2 )
journal, November 2018
- Yang, Xiaohui; Wang, Mengmeng; Li, Yupeng
- Superconductor Science and Technology, Vol. 31, Issue 12
Multi-band Superconductivity in a misfit layered compound (SnSe) 1.16 (NbSe 2 ) 2
journal, January 2020
- Bai, Hua; Qiao, Lei; Li, Miaocong
- Materials Research Express, Vol. 7, Issue 1
Superconductivity in a misfit layered compound (SnSe)$_{1.16}$(NbSe$_2$)
text, January 2018
- Bai, Hua; Yang, Xiaohui; Liu, Yi
- arXiv