Multiple Types of Topological Fermions in Transition Metal Silicides

Tang, Peizhe; Zhou, Quan; Zhang, Shou -Cheng

doi:10.1103/PhysRevLett.119.206402

Title: Multiple Types of Topological Fermions in Transition Metal Silicides

Journal Article · Fri Nov 17 00:00:00 EST 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.119.206402· OSTI ID:1418206

Tang, Peizhe ^[1]; Zhou, Quan ^[1]; Zhang, Shou -Cheng ^[2]

Stanford Univ., Stanford, CA (United States)
Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

Exotic massless fermionic excitations with nonzero Berry flux, other than the Dirac and Weyl fermions, could exist in condensed matter systems under the protection of crystalline symmetries, such as spin-1 excitations with threefold degeneracy and spin-3/2 Rarita-Schwinger-Weyl fermions. Herein, by using the ab initio density functional theory, we show that these unconventional quasiparticles coexist with type-I and type-II Weyl fermions in a family of transition metal silicides, including CoSi, RhSi, RhGe, and CoGe, when spin-orbit coupling is considered. Their nontrivial topology results in a series of extensive Fermi arcs connecting projections of these bulk excitations on the side surface, which is confirmed by (001) surface electronic spectra of CoSi. Additionally, these stable arc states exist within a wide energy window around the Fermi level, which makes them readily accessible in angle-resolved photoemission spectroscopy measurements.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1418206

Alternate ID(s):: OSTI ID: 1409233

Journal Information:: Physical Review Letters, Vol. 119, Issue 20; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 230 works

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Double-Weyl phonons in transition-metal monosilicides Zhang, Tiantian; Song, Zhida; Alexandradinata, A. arXiv https://doi.org/10.48550/arxiv.1705.07244	text	January 2017
Chiral Optical Response of Multifold Fermions Flicker, Felix; de Juan, Fernando; Bradlyn, Barry arXiv https://doi.org/10.48550/arxiv.1806.09642	text	January 2018
Observation of Chiral Fermions with a Large Topological Charge and and Associated Fermi-Arc Surface States in CoSi Takane, Daichi; Wang, Zhiwei; Souma, Seigo arXiv https://doi.org/10.48550/arxiv.1809.01312	text	January 2018
Fermi surface, possible unconventional fermions, and unusually robust resistive critical fields in the chiral-structured superconductor AuBe Rebar, Drew J.; Birnbaum, Serena M.; Singleton, John arXiv https://doi.org/10.48550/arxiv.1812.02830	text	January 2018
Transport across junctions of pseudospin-one fermions Nandy, Sourav; Sengupta, K.; Sen, Diptiman arXiv https://doi.org/10.48550/arxiv.1902.04175	text	January 2019
Linear optical conductivity of chiral multifold fermions Sánchez-Martínez, Miguel-Ángel; de Juan, Fernando; Grushin, Adolfo G. arXiv https://doi.org/10.48550/arxiv.1902.07271	text	January 2019
Multifold nodal points in magnetic materials Cano, Jennifer; Bradlyn, Barry; Vergniory, M. G. arXiv https://doi.org/10.48550/arxiv.1904.12867	text	January 2019
Leveraging Electron-Phonon Interaction to Enhance Thermoelectric Power Factor in Graphene-Like Semimetals Xia, Yi; Park, Junsoo; Ozoliņš, Vidvuds arXiv https://doi.org/10.48550/arxiv.1906.00115	text	January 2019
Difference frequency generation in topological semimetals de Juan, Fernando; Zhang, Yang; Morimoto, Takahiro arXiv https://doi.org/10.48550/arxiv.1907.02537	text	January 2019
Strong and Fragile Topological Dirac Semimetals with Higher-Order Fermi Arcs Wieder, Benjamin J.; Wang, Zhijun; Cano, Jennifer arXiv https://doi.org/10.48550/arxiv.1908.00016	text	January 2019
Strong bulk photovoltaic effect in chiral crystal in the visible spectrum Zhang, Yang; de Juan, Fernando; Grushin, Adolfo G. arXiv https://doi.org/10.48550/arxiv.1908.08878	text	January 2019
Angle-resolved photoemission spectroscopy and its application to topological materials Lv, Baiqing; Qian, Tian; Ding, Hong arXiv https://doi.org/10.48550/arxiv.2106.09797	text	January 2021

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