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Title: Weyl rings and enhanced susceptibilities in pyrochlore iridates: k · p analysis of cluster dynamical mean-field theory results

Journal Article · · Physical Review B
 [1];  [2];  [1]
  1. Columbia Univ., New York, NY (United States)
  2. Inst. for Basic Science, Daejeon (Korea, Republic of)
+ Show Author Affiliations

We match analytic results to numerical calculations to provide a detailed picture of the metal-insulator and topological transitions found in density functional plus cluster dynamical mean-field calculations of pyrochlore iridates. We discuss the transition from Weyl metal to Weyl semimetal regimes, and then analyze in detail the properties of the Weyl semimetal phase and its evolution into the topologically trivial insulator. The energy scales in the Weyl semimetal phase are found to be very small, as are the anisotropy parameters. The electronic structure can, to a good approximation, be described as “Weyl rings” and one of the two branches that contributes to the Weyl bands is essentially flat, leading to enhanced susceptibilities. The optical longitudinal and Hall conductivities are determined; the frequency dependence includes pronounced features that reveal the basic energy scales of the Weyl semimetal phase.

Research Organization:
Columbia Univ., New York, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FG02-04ER46169
OSTI ID:
1511821
Alternate ID(s):
OSTI ID: 1410392
Journal Information:
Physical Review B, Vol. 96, Issue 19; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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Direct determination of the spin structure of Nd 2 Ir 2 O 7 by means of neutron diffraction journal October 2016
Electron interactions, spin-orbit coupling, and intersite correlations in pyrochlore iridates journal January 2017
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Cited By (8)

The study of magnetic topological semimetals by first principles calculations journal October 2019
Optical signatures of Dirac nodal lines in NbAs 2 journal December 2018
Selective probing of magnetic order on Tb and Ir sites in stuffed Tb 2 Ir 2 O 7  using resonant x-ray scattering journal June 2019
Efficient hybridization fitting for dynamical mean-field theory via semi-definite relaxation journal January 2020
Optical Signatures of Dirac Nodal-lines in NbAs$_2$ text January 2018
Efficient hybridization fitting for dynamical mean-field theory via semi-definite relaxation text January 2019
The study of magnetic topological semimetals by first principles calculations text January 2019
Selective probing of magnetic order on Tb and Ir sites in stuffed Tb$_{2+x}$Ir$_{2-x}$O$_{7-y}$ using resonant X-ray scattering text January 2019

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