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Pressure-induced phase transition in La1x Smx O0.5 F0.5 BiS2

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [2];  [2];  [2]
  1. Univ. of California, San Diego, La Jolla, CA (United States); University of California, San Diego
  2. Univ. of California, San Diego, La Jolla, CA (United States)
Electrical resistivity measurements on La1–xSmxO0.5F0.5BiS2 (x = 0.1, 0.3, 0.6, 0.8) have been performed under applied pressures up to 2.6 GPa from 2 K to room temperature. The superconducting transition temperature Tc of each sample significantly increases at a Sm-concentration dependent pressure Pt, indicating a pressure-induced phase transition from a low-Tc to a high-Tc phase. At ambient pressure, Tc increases dramatically from 2.8 K at x = 0.1 to 5.4 K at x = 0.8; however, the Tc values at P > Pt decrease slightly with x and Pt shifts to higher pressures with Sm substitution. In the normal state, semiconducting-like behavior is suppressed and metallic conduction is induced with increasing pressure in all of the samples. Furthermore, these results suggest that the pressure dependence of Tc for the BiS2-based superconductors is related to the lattice parameters at ambient pressure and enable us to estimate the evolution of Tc for SmO0.5F0.5BiS2 under pressure.
Research Organization:
Univ. of California, San Diego, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
FG02-04ER46105; NA0001841; NA0002909
OSTI ID:
1257505
Alternate ID(s):
OSTI ID: 1215778
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 9 Vol. 92; ISSN 1098-0121; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Tuning electric charge scattering in YBCO single crystals via irradiation with MeV electrons journal October 2018
Peculiarities of pseudogap in Y0.95Pr0.05Ba2Cu3O7−δ single crystals under pressure up to 1.7 GPa journal December 2019
Superconductivity and structural instability in layered BiS 2 -based LaO 1−x BiS 2 journal January 2019
Pressure-induced enhancement of two-dimensionality in La O 1 − x F x Bi ( Se / S ) 2 superconductors journal October 2019
Tuning electric charge scattering in YBCO single crystals via irradiation with MeV electrons text January 2019

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