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Título: | Strong correlations and the search for high-Tc superconductivity in chromium pnictides and chalcogenides |
Autor: | Pizarro, J. M.; Calderón, M.J. CSIC ORCID; Liu, J.; Muñoz, M. Carmen CSIC; Bascones, Elena CSIC ORCID | Fecha de publicación: | 15-feb-2017 | Editor: | American Physical Society | Citación: | Physical Review - Section B - Condensed Matter 95(7): 075115 (2017) | Resumen: | Undoped iron superconductors accommodate n=6 electrons in five d orbitals. Experimental and theoretical evidence shows that the strength of correlations increases with hole doping, as the electronic filling approaches half filling with n=5 electrons. This evidence delineates a scenario in which the parent compound of iron superconductors is the half-filled system, in analogy to cuprate superconductors. In cuprates the superconductivity can be induced upon electron or hole doping. In this work we propose to search for high-Tc superconductivity and strong correlations in chromium pnictides and chalcogenides with n<5 electrons. By means of ab initio slave-spin and multiorbital random-phase-approximation calculations we analyze the strength of the correlations and the superconducting and magnetic instabilities in these systems with the main focus on LaCrAsO. We find that electron-doped LaCrAsO is a strongly correlated system with competing magnetic interactions, with (π,π) antiferromagnetism and nodal d-wave pairing being the most plausible magnetic and superconducting instabilities, respectively. | Versión del editor: | https://doi.org/10.1103/PhysRevB.95.075115 | URI: | http://hdl.handle.net/10261/189258 | DOI: | 10.1103/PhysRevB.95.075115 | Identificadores: | doi: 10.1103/PhysRevB.95.075115 e-issn: 2469-9969 issn: 2469-9950 |
Aparece en las colecciones: | (ICMM) Artículos |
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