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Title: Modification of structural disorder by hydrostatic pressure in the superconducting cuprate YBa 2 Cu 3 O 6.73

Journal Article · · Physical Review B
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [7];  [7];  [7];  [8];  [5];  [5];  [5]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); Chinese Academy of Sciences, Shanghai (China); Univ. of Chinese Academy of Sciences, Beijing (China)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States); Pohang Accelerator Lab., Gyeongbuk (Republic of Korea)
  3. Tohoku Univ., Sendai (Japan)
  4. Kyushu Sangyo Univ., Fukuoka (Japan)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  6. Chinese Academy of Sciences, Shanghai (China); Univ. of Chinese Academy of Sciences, Beijing (China)
  7. Carnegie Inst. of Washington, Argonne, IL (United States)
  8. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)

Here, compelling efforts to improve the critical temperature (Tc) of superconductors have been made through high-pressure application. Understanding the underlying mechanism behind such improvements is critically important; however, much remains unclear. Here we studied ortho-III YBa2Cu3O6.73 (YBCO) using x-ray scattering under hydrostatic pressure (HP) up to ~6.0GPa. We found the reinforced oxygen order of YBCO under HP, revealing an oxygen rearrangement in the Cu-O layer, which evidently shows the charge-transfer phenomenon between the CuO2 plane and Cu-O layer. Concurrently, we also observed no disorder-pinned charge-density-wave signature in CuO2 plane under HP. This indicates that the oxygen rearrangement modifies the quenched disorder state in the CuO2 plane. Using these results, we appropriately explain why pressure condition can achieve higher Tc compared with the optimal Tc under ambient pressure in YBa2Cu3O6+x. As an implication of these results, finally we have discussed that the change in disorder could make it easier for YBa2Cu3O6+x to undergo a transition to the nematic order under an external magnetic field.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC02-76SF00515; FG02-99ER45775; NA0001974; AC02-06CH11357
OSTI ID:
1436751
Alternate ID(s):
OSTI ID: 1436539
Journal Information:
Physical Review B, Vol. 97, Issue 17; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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Cited By (1)

Peculiarities of pseudogap in Y0.95Pr0.05Ba2Cu3O7−δ single crystals under pressure up to 1.7 GPa journal December 2019

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