Multiorbital charge-density wave excitations and concomitant phonon anomalies in Bi<subscript>2</subscript>Sr<subscript>2</subscript>LaCuO<subscript>6+d</subscript>.
In: Proceedings of the National Academy of Sciences of the United States of America, Jg. 117 (2020-07-14), Heft 28, S. 16219-16225
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Zugriff:
Charge-density waves (CDWs) are ubiquitous in underdoped cuprate superconductors. As a modulation of the valence electron density, CDWs in hole-doped cuprates possess both Cu-3d and O-2p orbital character owing to the strong hybridization of these orbitals near the Fermi level. Here, we investigate underdoped Bi2Sr1.4La0.6CuO6+d using resonant inelastic X-ray scattering (RIXS) and find that a shortrange CDW exists at both Cu and O sublattices in the copper-oxide (CuO2) planes with a comparable periodicity and correlation length. Furthermore, we uncover bond-stretching and bond-buckling phonon anomalies concomitant to the CDWs. Comparing to slightly overdoped Bi2Sr1.8La0.2CuO6+d, where neither CDWs nor phonon anomalies appear, we highlight that a sharp intensity anomaly is induced in the proximity of the CDW wavevector (QCDW) for the bond-buckling phonon, in concert with the diffused intensity enhancement of the bond-stretching phonon at wavevectors much greater than QCDW. Our results provide a comprehensive picture of the quasistatic CDWs, their dispersive excitations, and associated electron-phonon anomalies, which are key for understanding the competing electronic instabilities in cuprates. [ABSTRACT FROM AUTHOR]
Titel: |
Multiorbital charge-density wave excitations and concomitant phonon anomalies in Bi<subscript>2</subscript>Sr<subscript>2</subscript>LaCuO<subscript>6+d</subscript>.
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Autor/in / Beteiligte Person: | Li, Jiemin ; Nag, Abhishek ; Pelliciari, Jonathan ; Robarts, Hannah ; Walters, Andrew ; Garcia-Fernandez, Mirian ; Eisaki, Hiroshi ; Song, Dongjoon ; Ding, Hong ; Johnston, Steven ; Comin, Riccardo ; Zhou, Ke-Jin |
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Zeitschrift: | Proceedings of the National Academy of Sciences of the United States of America, Jg. 117 (2020-07-14), Heft 28, S. 16219-16225 |
Veröffentlichung: | 2020 |
Medientyp: | academicJournal |
ISSN: | 0027-8424 (print) |
DOI: | 10.1073/pnas.2001755117 |
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