تقرير
High-$T_c$ superconductors as a New Playground for High-order Van Hove singularities and Flat-band Physics
| العنوان: | High-$T_c$ superconductors as a New Playground for High-order Van Hove singularities and Flat-band Physics |
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| المؤلفون: | Markiewicz, Robert S., Singh, Bahadur, Lane, Christopher, Bansil, Arun |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Beyond the two-dimensional (2D) saddle-point Van Hove singularities (VHSs) with logarithmic divergences in the density of states (DOS), 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 Tc. 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 excitonic insulators and supermetals. Our study opens up a new materials playground for exploring the interplay between high-order VHSs, superconducting transition temperatures and electron correlation effects in the cuprates and related high-Tc superconductors. Comment: (7+8SM) pages, (4+5SM) figs. Paper 1 of revision of arXiv:2105.04546, submitted for publication 11/2/22 |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2303.08247 |
| رقم الأكسشن: | edsarx.2303.08247 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |