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Second dome of superconductivity in YBa2 Cu3 O7 at high pressure

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [2];  [4];  [2];  [5];  [4];  [2]
  1. Northeastern University, Boston, MA (United States); Northeastern University, Burlington, MA (United States); Howard University, Washington, DC (United States); LUT University, Lappeenranta (Finland)
  2. Northeastern University, Boston, MA (United States); Northeastern University, Burlington, MA (United States)
  3. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  4. Tulane University, New Orleans, LA (United States)
  5. LUT University, Lappeenranta (Finland); Northeastern University, Boston, MA (United States); Northeastern University, Burlington, MA (United States)

Evidence is growing that a second dome of high-Tc superconductivity can be accessed in the cuprates by increasing the doping beyond the first dome. Here, in this study, we use ab initio methods without invoking any free parameters, such as the Hubbard U, to reveal that pressure could turn YBa2⁢Cu3⁢O7 into an ideal candidate for second dome superconductivity, displaying the predicted signature of strongly hybridized dx2-y2 and dz2 orbitals. Notably, pressure is found to induce a phase transition replacing the antiferromagnetic phases with an orbitally degenerate d-d phase. Our study suggests that the origin of the second dome is correlated with the oxygen-hole fraction in the CuO2 planes and the collapse of the pseudogap phase.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); US Department of the Navy, Office of Naval Research (ONR)
Grant/Contract Number:
89233218CNA000001; SC0022216; AC02-05CH11231
OSTI ID:
2566447
Alternate ID(s):
OSTI ID: 2473755
Report Number(s):
LA-UR--23-24810
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 2 Vol. 110; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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