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Title: Incommensurate Phonon Anomaly and the Nature of Charge Density Waves in Cuprates

Abstract

While charge density wave (CDW) instabilities are ubiquitous to superconducting cuprates, the different ordering wave vectors in various cuprate families have hampered a unified description of the CDW formation mechanism. Here, we investigate the temperature dependence of the low-energy phonons in the canonical CDW-ordered cuprate La1.875Ba0.125CuO4. We discover that the phonon softening wave vector associated with CDW correlations becomes temperature dependent in the high-temperature precursor phase and changes from a wave vector of 0.238 reciprocal lattice units (r.l.u.) below the ordering transition temperature to 0.3 r.l.u. at 300 K. This high-temperature behavior also shows that “214”-type cuprates can host CDW correlations at a similar wave vector to previously reported CDW correlations in non-214-type cuprates such as YBa2Cu3O6+δ. This indicates that cuprate CDWs may arise from the same underlying instability despite their apparently different low-temperature ordering wave vectors.

Authors:
 [1];  [2];  [3];  [3];  [1];  [1];  [1];  [4];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  2. RIKEN SPring-8 Center and JASRI, Sayo Hyogo (Japan). Materials Dynamics Lab. and Research and Utilization Division
  3. Karlsruhe Inst. of Technology (KIT) (Germany). Inst. for Solid State Physics
  4. RIKEN SPring-8 Center, Sayo Hyogo (Japan). Materials Dynamics Lab.
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Inst. of Physical and Chemical Research (RIKEN), Wako (Japan)
OSTI Identifier:
1417428
Alternate Identifier(s):
OSTI ID: 1425002
Report Number(s):
BNL-114837-2017-JAAM
Journal ID: ISSN 2160-3308; PRXHAE; 011008
Grant/Contract Number:  
SC0012704; 20160097; 20170076
Resource Type:
Published Article
Journal Name:
Physical Review. X
Additional Journal Information:
Journal Name: Physical Review. X Journal Volume: 8 Journal Issue: 1; Journal ID: ISSN 2160-3308
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Miao, H., Ishikawa, D., Heid, R., Le Tacon, M., Fabbris, G., Meyers, D., Gu, G. D., Baron, A. Q. R., and Dean, M. P. M. Incommensurate Phonon Anomaly and the Nature of Charge Density Waves in Cuprates. United States: N. p., 2018. Web. doi:10.1103/PhysRevX.8.011008.
Miao, H., Ishikawa, D., Heid, R., Le Tacon, M., Fabbris, G., Meyers, D., Gu, G. D., Baron, A. Q. R., & Dean, M. P. M. Incommensurate Phonon Anomaly and the Nature of Charge Density Waves in Cuprates. United States. doi:10.1103/PhysRevX.8.011008.
Miao, H., Ishikawa, D., Heid, R., Le Tacon, M., Fabbris, G., Meyers, D., Gu, G. D., Baron, A. Q. R., and Dean, M. P. M. Thu . "Incommensurate Phonon Anomaly and the Nature of Charge Density Waves in Cuprates". United States. doi:10.1103/PhysRevX.8.011008.
@article{osti_1417428,
title = {Incommensurate Phonon Anomaly and the Nature of Charge Density Waves in Cuprates},
author = {Miao, H. and Ishikawa, D. and Heid, R. and Le Tacon, M. and Fabbris, G. and Meyers, D. and Gu, G. D. and Baron, A. Q. R. and Dean, M. P. M.},
abstractNote = {While charge density wave (CDW) instabilities are ubiquitous to superconducting cuprates, the different ordering wave vectors in various cuprate families have hampered a unified description of the CDW formation mechanism. Here, we investigate the temperature dependence of the low-energy phonons in the canonical CDW-ordered cuprate La1.875Ba0.125CuO4. We discover that the phonon softening wave vector associated with CDW correlations becomes temperature dependent in the high-temperature precursor phase and changes from a wave vector of 0.238 reciprocal lattice units (r.l.u.) below the ordering transition temperature to 0.3 r.l.u. at 300 K. This high-temperature behavior also shows that “214”-type cuprates can host CDW correlations at a similar wave vector to previously reported CDW correlations in non-214-type cuprates such as YBa2Cu3O6+δ. This indicates that cuprate CDWs may arise from the same underlying instability despite their apparently different low-temperature ordering wave vectors.},
doi = {10.1103/PhysRevX.8.011008},
journal = {Physical Review. X},
number = 1,
volume = 8,
place = {United States},
year = {2018},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevX.8.011008

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Cited by: 3 works
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