Hund-Enhanced Electronic Compressibility in FeSe and its Correlation with T c
| Autor: | Pablo Villar Arribi, Luca de' Medici |
|---|---|
| Přispěvatelé: | European Synchrotron Radiation Facility (ESRF), Laboratoire de Physique et d'Etude des Matériaux (UMR 8213) (LPEM), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2018 |
| Předmět: |
Superconductivity
Materials science Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Condensed Matter - Superconductivity Hydrostatic pressure FOS: Physical sciences General Physics and Astronomy 02 engineering and technology Electron 021001 nanoscience & nanotechnology 01 natural sciences Superconductivity (cond-mat.supr-con) [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con] Condensed Matter - Strongly Correlated Electrons Pairing Condensed Matter::Superconductivity 0103 physical sciences Monolayer Compressibility Orthorhombic crystal system Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Phase diagram |
| Zdroj: | Physical Review Letters Physical Review Letters, American Physical Society, 2018, 121 (19), pp.7001 (2018). ⟨10.1103/PhysRevLett.121.197001⟩ |
| ISSN: | 0031-9007 1079-7114 |
| DOI: | 10.1103/PhysRevLett.121.197001 |
| Popis: | We compute the compressibility of the conduction electrons in both bulk orthorhombic FeSe and monolayer FeSe on SrTiO$_3$ substrate, including dynamical electronic correlations within slave-spin mean-field + density-functional theory. Results show a zone of enhancement of the electronic compressibility crossing the interaction-doping phase diagram of these compounds in accord with previous simulations on iron pnictides and in general with the phenomenology of Hund's metals. Interestingly at ambient pressure FeSe is found slightly away from the zone with enhanced compressibility but moved right into it with hydrostatic pressure, while in monolayer FeSe the stronger enhancement region is realized on the electron-doped side. These findings correlate positively with the enhancement of superconductivity seen in experiments, and support the possibility that Hund's induced many-body correlations boost superconductive pairing when the system is at the frontier of the normal- to Hund's-metal crossover. 6 pages, 2 figures |
| Databáze: | OpenAIRE |
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