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

Wang, Runzhi; Go, Ara; Millis, Andrew

doi:10.1103/physrevb.96.195158

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

Journal Article · Mon Nov 27 00:00:00 EST 2017 · Physical Review B

DOI:https://doi.org/10.1103/physrevb.96.195158· OSTI ID:1511821

Wang, Runzhi ^[1]; Go, Ara ^[2]; Millis, Andrew ^[1]

Columbia Univ., New York, NY (United States)
Inst. for Basic Science, Daejeon (Korea, Republic of)

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.

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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

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Cited by: 9 works

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Efficient hybridization fitting for dynamical mean-field theory via semi-definite relaxation Mejuto-Zaera, Carlos; Zepeda-Núñez, Leonardo; Lindsey, Michael Physical Review B, Vol. 101, Issue 3 https://doi.org/10.1103/physrevb.101.035143	journal	January 2020
Optical Signatures of Dirac Nodal-lines in NbAs$_2$ Shao, Yinming; Sun, Zhiyuan; Wang, Ying arXiv https://doi.org/10.48550/arxiv.1806.01996	text	January 2018
Efficient hybridization fitting for dynamical mean-field theory via semi-definite relaxation Mejuto-Zaera, Carlos; Zepeda-Núñez, Leonardo; Lindsey, Michael arXiv https://doi.org/10.48550/arxiv.1907.07191	text	January 2019
The study of magnetic topological semimetals by first principles calculations Zou, Jinyu; He, Zhuoran; Xu, Gang arXiv https://doi.org/10.48550/arxiv.1909.11999	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 Donnerer, C.; Rahn, M. C.; Schierle, E. arXiv https://doi.org/10.48550/arxiv.1910.05551	text	January 2019

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