Title: Strongly Correlated Charge Density Wave in ${\mathrm{La}}_{2–x}{\mathrm{Sr}}_x{\mathrm{CuO}}_4$ Evidenced by Doping-Dependent Phonon Anomaly

Abstract

The discovery of charge-density-wave-related effects in the resonant inelastic x-ray scattering spectra of cuprates holds the tantalizing promise of clarifying the interactions that stabilize the electronic order. In this paper, we report a comprehensive resonant inelastic x-ray scattering study of ${\mathrm{La}}_{2–x}{\mathrm{Sr}}_x{\mathrm{CuO}}_4$ finding that charge-density wave effects persist up to a remarkably high doping level of $x=0.21$ before disappearing at $x=0.25$. The inelastic excitation spectra remain essentially unchanged with doping despite crossing a topological transition in the Fermi surface. This indicates that the spectra contain little or no direct coupling to electronic excitations near the Fermi surface, rather they are dominated by the resonant cross section for phonons and charge-density-wave-induced phonon softening. We interpret our results in terms of a charge-density wave that is generated by strong correlations and a phonon response that is driven by the charge-density-wave-induced modification of the lattice.

Authors:

Lin, J. Q.  ^[1];

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Miao, H. ^[2]; Mazzone, D. G.  ^[2];

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Gu, G. D. ^[2]; Nag, A.  ^[3];

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Walters, A. C.  ^[3];

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García-Fernández, M. ^[3]; Barbour, A. ^[4]; Pelliciari, J. ^[4]; Jarrige, I. ^[4]; Oda, M. ^[5]; Kurosawa, K. ^[5]; Momono, N. ^[6]; Zhou, Ke-Jin  ^[3];

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Bisogni, V. ^[4]; Liu, X. ^[7]; Dean, M. P. M.  ^[2]

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• Search DOE PAGES for ORCID "0000-0001-5139-3543"

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+ Show Author Affiliations

1. Brookhaven National Lab. (BNL), Upton, NY (United States); ShanghaiTech Univ. (China); Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Chinese Academy of Sciences (CAS), Beijing (China)
2. Brookhaven National Lab. (BNL), Upton, NY (United States)
3. Diamond Light Source (United Kingdom)
4. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
5. Hokkaido Univ., Sapporo (Japan)
6. Muroran Inst. of Technology (Japan)
7. ShanghaiTech Univ. (China)

Publication Date:

Thu May 21 00:00:00 EDT 2020

Research Org.:

Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES); ShanghaiTech University; Ministry of Science and Technology of the People’s Republic of China (MOST); National Natural Science Foundation of China (NSFC); Chinese Academy of Sciences (CAS)

OSTI Identifier:

1633032

Report Number(s):

BNL-216018-2020-JAAM
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US2201139

Grant/Contract Number:  

SC0012704; 2016YFA0401000; 11934017; 112111KYSB20170059

Resource Type:

Accepted Manuscript

Journal Name:

Physical Review Letters

Additional Journal Information:

Journal Volume: 124; Journal Issue: 20; 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