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Phase diagram of pyrochlore iridates: all-in/all-out magnetic ordering and non-Fermi liquid properties | | Hiroshi Shinaoka
; Shintaro Hoshino
; Matthias Troyer
; Philipp Werner
; | | Date: |
Wed, 15 Apr 2015 16:45:23 GMT (1874kb,D) | | Abstract: | We study the prototype 5d pyrochlore iridate Y2Ir2O7 from first principles
using the local density approximation and dynamical mean-field theory
(LDA+DMFT). We map out the phase diagram in the space of temperature, onsite
Coulomb repulsion U, and filling. Consistent with experiments, we find that an
all-in/all-out ordered insulating phase is stable for realistic values of U.
The spin and orbital moments are larger than those of the jeff=1/2 doublet due
to the trigonal crystal field, which shows that a three band description is
important. We demonstrate a substantial band narrowing in the paramagnetic
metallic phase and non-Fermi liquid behavior in the electron/hole doped system
originating from long-lived quasi-spin moments induced by nearly flat bands. | | Source: | arXiv, 1504.3962 | | Services: | Forum | Review | PDF | Favorites | |
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