Unconventional Chiral Fermions and Large Topological Fermi Arcs in RhSi

Chang, Guoqing; Xu, Su-Yang; Wieder, Benjamin J.; Sanchez, Daniel S.; Huang, Shin-Ming; Belopolski, Ilya; Chang, Tay-Rong; Zhang, Songtian; Bansil, Arun; Lin, Hsin; Hasan, M. Zahid

doi:10.1103/PhysRevLett.119.206401

Unconventional Chiral Fermions and Large Topological Fermi Arcs in RhSi

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

DOI:https://doi.org/10.1103/PhysRevLett.119.206401· OSTI ID:1544354

Chang, Guoqing ^[1]; Xu, Su-Yang ^[2]; Wieder, Benjamin J. ^[3]; Sanchez, Daniel S. ^[2]; Huang, Shin-Ming ^[4]; Belopolski, Ilya ^[2]; Chang, Tay-Rong ^[5]; Zhang, Songtian ^[2]; Bansil, Arun ^[6]; Lin, Hsin ^[1]; Hasan, M. Zahid ^[7]

National Univ. of Singapore (Singapore)
Princeton Univ., NJ (United States)
KTH Royal Inst. of Technology, Stockholm (Sweden)
National Sun Yat-sen Univ. (Taiwan)
National Cheng Kung Univ. (Taiwan)
Northeastern Univ., Boston, MA (United States)
Princeton Univ., NJ (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

The theoretical proposal of chiral fermions in topological semimetals has led to a significant effort towards their experimental realization. In particular, the Fermi surfaces of chiral semimetals carry quantized Chern numbers, making them an attractive platform for the observation of exotic transport and optical phenomena. Although the simplest example of a chiral fermion in condensed matter is a conventional |C|=1 Weyl fermion, recent theoretical works have proposed a number of unconventional chiral fermions beyond the standard model which are protected by unique combinations of topology and crystalline symmetries. Yet, materials candidates for experimentally probing the transport and response signatures of these unconventional fermions have thus far remained elusive. Here, we propose the RhSi family in space group No. 198 as the ideal platform for the experimental examination of unconventional chiral fermions. We find that RhSi is a filling-enforced semimetal that features near its Fermi surface a chiral double sixfold-degenerate spin-1 Weyl node at R and a previously uncharacterized fourfold-degenerate chiral fermion at Γ. Each unconventional fermion displays Chern number ±4 at the Fermi level. We also show that RhSi displays the largest possible momentum separation of compensative chiral fermions, the largest proposed topologically nontrivial energy window, and the longest possible Fermi arcs on its surface. We conclude by proposing signatures of an exotic bulk photogalvanic response in RhSi.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-05CH11231; FG02-07ER46352

OSTI ID:: 1544354

Alternate ID(s):: OSTI ID: 1409231

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

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Higher-Order Topology, Monopole Nodal Lines, and the Origin of Large Fermi Arcs in Transition Metal Dichalcogenides X Te 2 ( X = Mo , W ) Wang, Zhijun; Wieder, Benjamin J.; Li, Jian Physical Review Letters, Vol. 123, Issue 18 https://doi.org/10.1103/physrevlett.123.186401	journal	October 2019
Photoemission Spectroscopic Evidence for the Dirac Nodal Line in the Monoclinic Semimetal SrAs 3 Song, Y. K.; Wang, G. W.; Li, S. C. Physical Review Letters, Vol. 124, Issue 5 https://doi.org/10.1103/physrevlett.124.056402	journal	February 2020
Prediction of threefold fermions in a nearly ideal Dirac semimetal BaAgAs Mardanya, Sougata; Singh, Bahadur; Huang, Shin-Ming Physical Review Materials, Vol. 3, Issue 7 https://doi.org/10.1103/physrevmaterials.3.071201	journal	July 2019
Cyclotron orbit knot and tunable-field quantum Hall effect Zhang, Yi Physical Review Research, Vol. 1, Issue 2 https://doi.org/10.1103/physrevresearch.1.022005	journal	September 2019
Difference frequency generation in topological semimetals de Juan, F.; Zhang, Y.; Morimoto, T. Physical Review Research, Vol. 2, Issue 1 https://doi.org/10.1103/physrevresearch.2.012017	journal	January 2020
Weyl and Dirac semimetals in three-dimensional solids Armitage, N. P.; Mele, E. J.; Vishwanath, Ashvin Reviews of Modern Physics, Vol. 90, Issue 1 https://doi.org/10.1103/revmodphys.90.015001	journal	January 2018
Quasiparticle interference evidence of the topological Fermi arc states in chiral fermionic semimetal CoSi Yuan, Qian-Qian; Zhou, Liqin; Rao, Zhi-Cheng Science Advances, Vol. 5, Issue 12 https://doi.org/10.1126/sciadv.aaw9485	journal	December 2019
Wallpaper fermions and the nonsymmorphic Dirac insulator Wieder, Benjamin J.; Bradlyn, Barry; Wang, Zhijun Science, Vol. 361, Issue 6399 https://doi.org/10.1126/science.aan2802	journal	July 2018
Strong and fragile topological Dirac semimetals with higher-order Fermi arcs Wieder, Benjamin J.; Wang, Zhijun; Cano, Jennifer Freie Universität Berlin https://doi.org/10.17169/refubium-26770	text	January 2020
Electronic Structure of B20 (FeSi-Type) Transition-Metal Monosilicides Pshenay-Severin, Dmitry A.; Burkov, Alexander T. Materials, Vol. 12, Issue 17 https://doi.org/10.3390/ma12172710	journal	August 2019
Weyl and Dirac Semimetals in Three Dimensional Solids Armitage, N. P.; Mele, E. J.; Vishwanath, Ashvin arXiv https://doi.org/10.48550/arxiv.1705.01111	text	January 2017
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
Multiple types of topological fermions in transition metal silicides Tang, Peizhe; Zhou, Quan; Zhang, Shou-Cheng arXiv https://doi.org/10.48550/arxiv.1706.03817	text	January 2017
Topological Triply Degenerate Points Induced by Spin-Tensor-Momentum Couplings Hu, Haiping; Hou, Junpeng; Zhang, Fan arXiv https://doi.org/10.48550/arxiv.1709.04964	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
Cyclotron orbit knot and tunable-field quantum Hall effect Zhang, Yi arXiv https://doi.org/10.48550/arxiv.1905.02192	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
Nonlinear Absorption and Photocurrent in Weyl Semimetals Leppenen, N. V.; Ivchenko, E. L.; Golub, L. E. arXiv https://doi.org/10.48550/arxiv.1906.00686	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
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
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
Topological quantum properties of chiral crystals Chang, Guoqing; Wieder, Benjamin J.; Schindler, Frank Nature Publishing Group https://doi.org/10.5167/uzh-158525	text	January 2018

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