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Title: Pressure-enhanced superconductivity in Eu 3 Bi 2 S 4 F 4

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [2];  [2];  [2];  [2];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Zhejiang Univ., Hangzhou (China)

The pressure effect on the newly discovered charge-transferred BiS2-based superconductor, Eu3Bi2S4F4, with a Tc of 1.5 K at ambient pressure, is investigated by transport and magnetic measurements. Accompanied with the enhancement of metallicity under pressures, the onset superconducting transition temperature increases abruptly around 1.0 GPa, reaching ~10.0 K at 2.26 GPa. Alternating current magnetic susceptibility measurements indicate that a new superconducting phase with a higher Tc emerges and dominates at high pressures. In the broad pressure window of 0.68GPa≤p≤2.00 GPa, the high-Tc phase coexists with the low-Tc phase. Hall effect measurements reveal a significant difference in electronic structures between the two superconducting phases. As a result, our work devotes the effort to establish the commonality of pressure effect on the BiS2-based superconductors, and also uncovers the importance of electron carrier density in the high-Tc phase.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
11190023; AC52-06NA25396
OSTI ID:
1227732
Report Number(s):
LA-UR-14-28575; PRBMDO
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 90, Issue 22; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

References (18)

Possible highT c superconductivity in the Ba?La?Cu?O system journal June 1986
Iron-Based Layered Superconductor La[O 1- x F x ]FeAs ( x = 0.05−0.12) with T c = 26 K journal March 2008
Superconductivity in Novel BiS 2 -Based Layered Superconductor LaO 1- x F x BiS 2 journal November 2012
Superconductivity appears in the vicinity of semiconducting-like behavior in CeO 1 x F x BiS 2 journal December 2012
Synthesis and Superconductivity of New BiS2 Based Superconductor PrO0.5F0.5BiS2 journal January 2013
Superconductivity of F-substituted Ln OBiS 2 ( Ln =La, Ce, Pr, Nd, Yb) compounds journal February 2013
New Member of BiS 2 -Based Superconductor NdO 1- x F x BiS 2 journal March 2013
Superconductivity in a new layered bismuth oxyselenide: LaO 0.5 F 0.5 BiSe 2 journal May 2014
Pressure-tuned enhancement of superconductivity and change of ground state properties in LaO 0.5 F 0.5 BiSe 2 single crystals journal September 2014
Superconductivity induced by La doping in Sr 1 x La x FBiS 2 journal January 2013
Possible charge-density wave, superconductivity, and f -electron valence instability in EuBiS 2 F journal August 2014
Pressure-induced enhancement of superconductivity and suppression of semiconducting behavior in L n O 0.5 F 0.5 BiS 2 ( L n = La ,Ce) compounds journal August 2013
Pressure-Induced Enhancement of Superconductivity and Structural Transition in BiS 2 -Layered LaO 1− x F x BiS 2 journal June 2014
Anomalous Eu Valence State and Superconductivity in Undoped Eu 3 Bi 2 S 4 F 4 journal October 2014
Enhancement of superconductivity near the pressure-induced semiconductor–metal transition in the BiS 2 -based superconductors LnO 0.5 F 0.5 BiS 2 (Ln = La, Ce, Pr, Nd) journal September 2013
Anisotropic upper critical field of the BiS 2 -based superconductor LaO 0.5 F 0.5 BiS 2 journal May 2014
Growth and superconducting properties of F-substituted ROBiS2 (R=La, Ce, Nd) single crystals journal January 2014
Minimal electronic models for superconducting BiS 2 layers journal December 2012

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