title: Interplay between Kondo suppression and Lifshitz transitions in YbRh2Si2 at high magnetic fields.
abstract: We investigate the magnetic field dependent thermopower, thermal conductivity, resistivity, and Hall effect in the heavy fermion metal YbRh2Si2. In contrast to reports on thermodynamic measurements, we find in total three transitions at high fields, rather than a single one at 10 T. Using the Mott formula together with renormalized band calculations, we identify Lifshitz transitions as their origin. The predictions of the calculations show that all experimental results rely on an interplay of a smooth suppression of the Kondo effect and the spin splitting of the flat hybridized bands.
authors.affiliation: Max Planck Institute for Chemical Physics of Solids, D-01187 Dresden, Germany. pfau@cpfs.mpg.de
authors.forename: H
authors.initials: H
authors.lastname: Pfau
authors.forename: R
authors.initials: R
authors.lastname: Daou
authors.forename: S
authors.initials: S
authors.lastname: Lausberg
authors.forename: H R
authors.initials: HR
authors.lastname: Naren
authors.forename: M
authors.initials: M
authors.lastname: Brando
authors.forename: S
authors.initials: S
authors.lastname: Friedemann
authors.forename: S
authors.initials: S
authors.lastname: Wirth
authors.forename: T
authors.initials: T
authors.lastname: Westerkamp
authors.forename: U
authors.initials: U
authors.lastname: Stockert
authors.forename: P
authors.initials: P
authors.lastname: Gegenwart
authors.forename: C
authors.initials: C
authors.lastname: Krellner
authors.forename: C
authors.initials: C
authors.lastname: Geibel
authors.forename: G
authors.initials: G
authors.lastname: Zwicknagl
authors.forename: F
authors.initials: F
authors.lastname: Steglich