To the top

Page Manager: Webmaster
Last update: 9/11/2012 3:13 PM

Tell a friend about this page
Print version

Orbital selectivity in Hu… - University of Gothenburg, Sweden Till startsida
Sitemap
To content Read more about how we use cookies on gu.se

Orbital selectivity in Hund's metals: The iron chalcogenides

Journal article
Authors N. Lanata
Hugo Strand
G. Giovannetti
Bo Hellsing
L. de' Medici
M. Capone
Published in Physical Review B
Volume 87
Issue 4
Pages artikel nr 045122
ISSN 1098-0121
Publication year 2013
Published at Department of Physics (GU)
Pages artikel nr 045122
Language en
Links dx.doi.org/10.1103/PhysRevB.87.0451...
https://gup.ub.gu.se/file/128286
Keywords pnictides, superconductivity, itinerant, electrons
Subject categories Physical Sciences

Abstract

We show that electron correlations lead to a bad metallic state in chalcogenides FeSe and FeTe despite the intermediate value of the Hubbard repulsion U and Hund’s rule coupling J. The evolution of the quasi particle weight Z as a function of the interaction terms reveals a clear crossover at U ≃ 2.5 eV. In the weak coupling limit Z decreases for all correlated d orbitals as a function of U and beyond the crossover coupling they become weakly dependent on U while strongly depend on J. A marked orbital dependence of the Z’s emerges even if in general the orbital-selective Mott transition only occurs for relatively large values of U. This two-stage reduction of the quasi particle coherence due to the combined effect of Hubbard U and the Hund’s J, suggests that the iron-based superconductors can be referred to as Hund’s correlated metals.

Page Manager: Webmaster|Last update: 9/11/2012
Share:

The University of Gothenburg uses cookies to provide you with the best possible user experience. By continuing on this website, you approve of our use of cookies.  What are cookies?