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Title: Scaling behavior of low-temperature orthorhombic domains in the prototypical high-temperature superconductor La 1.875 Ba 0.125 CuO 4

Journal Article · · Physical Review B
ORCiD logo [1];  [2];  [3];  [4];  [4];  [1];  [1]; ORCiD logo [1];  [1];  [5]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Univ. College London (United Kingdom)
  4. Advanced Photon Source, Argonne, IL (United States)
  5. Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. College London (United Kingdom)

Structural symmetry breaking and recovery in condensed-matter systems are closely related to exotic physical properties such as superconductivity (SC), magnetism, spin density waves, and charge density waves (CDWs). The interplay between different order parameters is intricate and often subject to intense debate, as in the case of CDW order and superconductivity. In La1.875Ba0.125CuO4 (LBCO), the low-temperature structural domain walls are hypothesized as nanometer-scale pinning sites for the CDWs. Coherent x-ray diffraction techniques have been employed here to visualize the domain structures associated with these symmetry changes directly during phase transition. We have pushed Bragg coherent diffractive imaging (BCDI) into the cryogenic regime where most phase transitions in quantum materials reside. Utilizing BCDI, we image the structural evolution of LBCO microcrystal samples during the high-temperature tetragonal to low-temperature orthorhombic (LTO) phase transition. Our results show the formation of LTO domains close to the transition temperature and how the domain size decreases with temperature. The number of domains follows the secondary order parameter (or orthorhombic strain) measurement with a critical exponent that is consistent with the three-dimensional universality class.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
SC0012704; AC02-06CH11357; NSF-DMR 9724294
OSTI ID:
1595695
Alternate ID(s):
OSTI ID: 1599525; OSTI ID: 1604976
Report Number(s):
BNL-213585-2020-JAAM; BNL-213690-2020-JAAM; PRBMDO; TRN: US2101068
Journal Information:
Physical Review B, Vol. 101, Issue 5; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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