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Title: Fragility of Charge Order Near an Antiferromagnetic Quantum Critical Point

Abstract

Here, we investigate the interplay between charge order and superconductivity near an antiferromagnetic quantum critical point using sign-problem-free Quantum Monte Carlo simulations. We establish that, when the electronic dispersion is particle-hole symmetric, the system has an emergent SU(2) symmetry that implies a degeneracy between d-wave superconductivity and charge order with d-wave form factor. Deviations from particle-hole symmetry, however, rapidly lift this degeneracy, despite the fact that the SU(2) symmetry is preserved at low energies. As a result, we find a strong suppression of charge order caused by the competing, leading superconducting instability. Across the antiferromagnetic phase transition, we also observe a shift in the charge order wave vector from diagonal to axial. We discuss the implications of our results to the universal phase diagram of antiferromagnetic quantum-critical metals and to the elucidation of the charge order experimentally observed in the cuprates.

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Univ. of Minnesota, Minneapolis, MN (United States). School of Physics and Astronomy; Univ. of Chicago, IL (United States). Dept. of Physics
  2. Univ. of Illinois at Urbana-Champaign, IL (United States). Inst. for Condensed Matter Theory and Dept. of Physics
  3. Weizmann Inst. of Science, Rehovot (Israel); Stanford Univ., CA (United States). Dept. of Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
  4. Univ. of Chicago, IL (United States). Dept. of Physics
  5. Univ. of Minnesota, Minneapolis, MN (United States). School of Physics and Astronomy
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; Research Corp. for Science Advancement (RCSA), Tuscon, AZ (United States); Gordon and Betty Moore Foundation
OSTI Identifier:
1460676
Alternate Identifier(s):
OSTI ID: 1454366
Grant/Contract Number:  
SC0012336; GBMF4305; AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 24; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; antiferromagnetism; charge density waves; quantum phase transitions; superconducting order parameter; superconductivity; cuprates; high-temperature superconductors; methods in superconductivity; quantum Monte Carlo

Citation Formats

Wang, Xiaoyu, Wang, Yuxuan, Schattner, Yoni, Berg, Erez, and Fernandes, Rafael M. Fragility of Charge Order Near an Antiferromagnetic Quantum Critical Point. United States: N. p., 2018. Web. doi:10.1103/physrevlett.120.247002.
Wang, Xiaoyu, Wang, Yuxuan, Schattner, Yoni, Berg, Erez, & Fernandes, Rafael M. Fragility of Charge Order Near an Antiferromagnetic Quantum Critical Point. United States. doi:10.1103/physrevlett.120.247002.
Wang, Xiaoyu, Wang, Yuxuan, Schattner, Yoni, Berg, Erez, and Fernandes, Rafael M. Fri . "Fragility of Charge Order Near an Antiferromagnetic Quantum Critical Point". United States. doi:10.1103/physrevlett.120.247002. https://www.osti.gov/servlets/purl/1460676.
@article{osti_1460676,
title = {Fragility of Charge Order Near an Antiferromagnetic Quantum Critical Point},
author = {Wang, Xiaoyu and Wang, Yuxuan and Schattner, Yoni and Berg, Erez and Fernandes, Rafael M.},
abstractNote = {Here, we investigate the interplay between charge order and superconductivity near an antiferromagnetic quantum critical point using sign-problem-free Quantum Monte Carlo simulations. We establish that, when the electronic dispersion is particle-hole symmetric, the system has an emergent SU(2) symmetry that implies a degeneracy between d-wave superconductivity and charge order with d-wave form factor. Deviations from particle-hole symmetry, however, rapidly lift this degeneracy, despite the fact that the SU(2) symmetry is preserved at low energies. As a result, we find a strong suppression of charge order caused by the competing, leading superconducting instability. Across the antiferromagnetic phase transition, we also observe a shift in the charge order wave vector from diagonal to axial. We discuss the implications of our results to the universal phase diagram of antiferromagnetic quantum-critical metals and to the elucidation of the charge order experimentally observed in the cuprates.},
doi = {10.1103/physrevlett.120.247002},
journal = {Physical Review Letters},
number = 24,
volume = 120,
place = {United States},
year = {2018},
month = {6}
}

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