English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/93972
Compartir / Impacto:
Add this article to your Mendeley library MendeleyBASE
Citado 8 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)

Coupling of the As A1g phonon to magnetism in iron pnictides

Autor García-Martínez, Noel A.; Valenzuela, Belén ; Ciuchi, S.; Cappelluti, E. ; Calderón, M.J. ; Bascones, Elena
Fecha de publicación 2013
EditorAmerican Physical Society
Citación Physical Review B 88: 165106 (2013)
ResumenCharge, spin, and lattice degrees of freedom are strongly entangled in iron superconductors. A neat consequence of this entanglement is the behavior of the A1g As-phonon resonance in the different polarization symmetries of Raman spectroscopy when undergoing the magnetostructural transition. In this work, we show that the observed behavior could be a direct consequence of the coupling of the phonons with the electronic excitations in the anisotropic magnetic state. We discuss this scenario within a five-orbital tight-binding model coupled to phonons via the dependence of the Slater-Koster parameters on the As position. We identify two qualitatively different channels of the electron-phonon interaction: a geometrical one related to the Fe-As-Fe angle α and another one associated with the modification upon As displacement of the Fe-As energy integrals pdσ and pdπ. While both mechanisms result in a finite B1g response, the behavior of the phonon intensity in the A1g and B1g Raman polarization geometries is qualitatively different when the coupling is driven by the angle or by the energy integral dependence. We discuss our results in view of the experimental reports. © 2013 American Physical Society.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevB.88.165106
URI http://hdl.handle.net/10261/93972
Identificadoresdoi: 10.1103/PhysRevB.88.165106
issn: 1098-0121
e-issn: 1550-235X
Aparece en las colecciones: (ICMM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Coupling of the As A1g.pdf463,35 kBAdobe PDFVista previa
Mostrar el registro completo

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.