Effect of Fermi Surface Nesting on Resonant Spin Excitations inBa1−xKxFe2As2

Autor:	Raymond Osborn, Eugene Goremychkin, Helmut Claus, Saurabh Maiti, I. S. Todorov, Andrey V. Chubukov, Tatiana Guidi, Stephan Rosenkranz, Mercouri G. Kanatzidis, R. I. Bewley, Johannes Knolle, Ilya Eremin, John-Paul Castellan, F. Weber, Duck Young Chung, M. R. Norman
Rok vydání:	2011
Předmět:	Physics Superconductivity Condensed matter physics Binding energy Fermi level General Physics and Astronomy Fermi surface Electron Inelastic scattering Resonance (particle physics) Inelastic neutron scattering symbols.namesake symbols Condensed Matter::Strongly Correlated Electrons
Zdroj:	Physical Review Letters. 107
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.107.177003
Popis:	We report inelastic neutron scattering measurements of the resonant spin excitations in Ba(1-x)K(x)Fe(2)As(2) over a broad range of electron band filling. The fall in the superconducting transition temperature with hole doping coincides with the magnetic excitations splitting into two incommensurate peaks because of the growing mismatch in the hole and electron Fermi surface volumes, as confirmed by a tight-binding model with s(±)-symmetry pairing. The reduction in Fermi surface nesting is accompanied by a collapse of the resonance binding energy and its spectral weight, caused by the weakening of electron-electron correlations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dc65d2bed916a23d748dddd9ae6e867a https://doi.org/10.1103/physrevlett.107.177003 Zobrazit plný text záznamu