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Title: Ideal charge-density-wave order in the high-field state of superconducting YBCO

The existence of charge-density-wave (CDW) correlations in cuprate superconductors has now been established. However, the nature of the CDW ground state has remained uncertain because disorder and the presence of superconductivity typically limit the CDW correlation lengths to only a dozen unit cells or less. Here we explore the field-induced 3D CDW correlations in extremely pure detwinned crystals of YBa2Cu3O2 (YBCO) ortho-II and ortho-VIII at magnetic fields in excess of the resistive upper critical field (Hc2) where superconductivity is heavily suppressed. We observe that the 3D CDW is unidirectional and possesses a long in-plane correlation length as well as significant correlations between neighboring CuO2 planes. It is significant that we observe only a single sharply defined transition at a critical field proportional to Hc2, given that the field range used in this investigation overlaps with other high-field experiments including quantum oscillation measurements. The correlation volume is at least two to three orders of magnitude larger than that of the zero-field CDW. Furthermore, this is by far the largest CDW correlation volume observed in any cuprate crystal and so is presumably representative of the high-field ground state of an “ideal” disorder-free cuprate.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [4] ;  [4] ;  [5] ;  [1] ;  [1] ;  [6] ;  [6] ;  [6] ;  [7] ;  [8] ;  [1] ;  [1] ;  [2] ;  [9] ;  [4] more »;  [1] ;  [1] ;  [1] « less
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. SLAC National Accelerator Lab. and Stanford Univ., Menlo Park, CA (United States)
  3. Tohoku Univ., Sendai (Japan)
  4. Stanford Univ., Stanford, CA (United States)
  5. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  6. Univ. of British Columbia, Vancouver, BC (Canada); Canadian Institute for Advanced Research, Toronto, ON (Canada)
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States); Western Michigan Univ., Kalamazoo MI (United States)
  8. Argonne National Lab. (ANL), Argonne, IL (United States)
  9. SLAC National Accelerator Lab. and Stanford Univ., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
Publication Date:
OSTI Identifier:
1334549
Report Number(s):
SLAC-PUB-16871
Journal ID: ISSN 0027-8424; arXiv:1607.05359
Grant/Contract Number:
AC02-76SF00515; AC02-06CH11357
Type:
Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 113; Journal Issue: 51; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences and Engineering Division
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; MATSCI; SYNCHRAD; XFEL; high-temperature superconductors; charge-density-wave order; high magnetic field X-ray scattering; vestigial nematic order; competing order