Pressure-induced enhancement of the superconducting transition temperature in La2O2Bi3AgS6.
J Phys Condens Matter
; 34(6)2021 Nov 15.
Article
em En
| MEDLINE
| ID: mdl-34715684
ABSTRACT
Charge density wave (CDW) instability is often found in phase diagrams of superconductors such as cuprates and certain transition-metal dichalcogenides. This proximity to superconductivity triggers the question on whether CDW instability is responsible for the pairing of electrons in these superconductors. However, this issue remains unclear and new systems are desired to provide a better picture. Here, we report the temperature-pressure phase diagram of a recently discovered BiS2superconductor La2O2Bi3AgS6, which shows a possible CDW transition atT* â¼ 155 K and a superconducting transition atTcâ¼ 1.0 K at ambient pressure, via electrical resistivity measurements. Upon applying pressure,T* decreases linearly and extrapolates to 0 K at 3.9 GPa. Meanwhile,Tcis enhanced and reaches maximum value of 4.1 K at 3.1 GPa, forming a superconducting dome in the temperature-pressure phase diagram.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Phys Condens Matter
Assunto da revista:
BIOFISICA
Ano de publicação:
2021
Tipo de documento:
Article