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Title: Investigating the Cuprates as a platform for high-order Van Hove singularities and flat-band physics

Abstract

Abstract Beyond the two-dimensional saddle-point Van Hove singularities (VHSs) with logarithmic divergences in the density of states, recent studies have identified higher-order VHSs with faster-than-logarithmic divergences that can amplify electron correlation effects. Here we show that the cuprate high-Tc superconductors harbor high-order VHSs in their electronic spectra and unveil a new correlation that the cuprates with high-order VHSs display higher T c ’s. Our analysis indicates that the normal and higher-order VHSs can provide a straightforward new marker for identifying propensity of a material toward the occurrence of correlated phases such as the excitonic insulators and supermetals. Our study suggests cuprates and related high-T c superconductors as materials for exploring the interplay between high-order VHSs, superconducting transition temperatures, and electron correlation effects.

Authors:
ORCiD logo; ORCiD logo; ; ORCiD logo
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
2202339
Resource Type:
Published Article
Journal Name:
Communications Physics
Additional Journal Information:
Journal Name: Communications Physics Journal Volume: 6 Journal Issue: 1; Journal ID: ISSN 2399-3650
Publisher:
Nature Publishing Group
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Markiewicz, Robert S., Singh, Bahadur, Lane, Christopher, and Bansil, Arun. Investigating the Cuprates as a platform for high-order Van Hove singularities and flat-band physics. United Kingdom: N. p., 2023. Web. doi:10.1038/s42005-023-01373-z.
Markiewicz, Robert S., Singh, Bahadur, Lane, Christopher, & Bansil, Arun. Investigating the Cuprates as a platform for high-order Van Hove singularities and flat-band physics. United Kingdom. https://doi.org/10.1038/s42005-023-01373-z
Markiewicz, Robert S., Singh, Bahadur, Lane, Christopher, and Bansil, Arun. Fri . "Investigating the Cuprates as a platform for high-order Van Hove singularities and flat-band physics". United Kingdom. https://doi.org/10.1038/s42005-023-01373-z.
@article{osti_2202339,
title = {Investigating the Cuprates as a platform for high-order Van Hove singularities and flat-band physics},
author = {Markiewicz, Robert S. and Singh, Bahadur and Lane, Christopher and Bansil, Arun},
abstractNote = {Abstract Beyond the two-dimensional saddle-point Van Hove singularities (VHSs) with logarithmic divergences in the density of states, recent studies have identified higher-order VHSs with faster-than-logarithmic divergences that can amplify electron correlation effects. Here we show that the cuprate high-Tc superconductors harbor high-order VHSs in their electronic spectra and unveil a new correlation that the cuprates with high-order VHSs display higher T c ’s. Our analysis indicates that the normal and higher-order VHSs can provide a straightforward new marker for identifying propensity of a material toward the occurrence of correlated phases such as the excitonic insulators and supermetals. Our study suggests cuprates and related high-T c superconductors as materials for exploring the interplay between high-order VHSs, superconducting transition temperatures, and electron correlation effects.},
doi = {10.1038/s42005-023-01373-z},
journal = {Communications Physics},
number = 1,
volume = 6,
place = {United Kingdom},
year = {Fri Oct 13 00:00:00 EDT 2023},
month = {Fri Oct 13 00:00:00 EDT 2023}
}

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