Observation of bulk states and spin-polarized topological surface states in transition metal dichalcogenide Dirac semimetal candidate NiTe2

被引：68

作者：

Ghosh, Barun ^{[1
]}

Mondal, Debashis ^{[2
,3
]}

Kuo, Chia-Nung ^{[4
]}

Lue, Chin Shan ^{[4
]}

Nayak, Jayita ^{[1
]}

Fujii, Jun ^{[2
]}

Vobornik, Ivana ^{[2
]}

Politano, Antonio ^{[5
,6
]}

Agarwal, Amit ^{[1
]}

机构：

[1] Indian Inst Technol Kanpur, Dept Phys, Kanpur 208016, Uttar Pradesh, India

[2] CNR, IOM, Lab TASC, Area Sci Pk,SS 14,Km 163-5, I-34149 Trieste, Italy

[3] Abdus Salaam Int Ctr Theoret Phys, Str Costiera 11, I-34100 Trieste, Italy

[4] Natl Cheng Kung Univ, Dept Phys, 1 Ta Hsueh Rd, Tainan 70101, Taiwan

[5] Univ Aquila, DSFC, Via Vetoio 10, I-67100 Laquila, Italy

[6] CNR, IMM, 8 Str 5, I-95121 Catania, Italy

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 19期

关键词：

DISCOVERY; PHOTOEMISSION; PDTE2;

D O I：

10.1103/PhysRevB.100.195134

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We predict NiTe2 to be a type-II Dirac semimetal based on ab initio calculations and explore its bulk and spin-polarized surface states using spin- and angle-resolved photoemission spectroscopy (spin-ARPES). Our results show that, unlike PtTe2, PtSe2, and PdTe2, the Dirac node in NiTe2 is located in close vicinity to the Fermi energy. Additionally, NiTe2 also hosts a pair of band inversions below the Fermi level along the Gamma -A high-symmetry direction, with one of them leading to a Dirac cone in the surface states. The bulk Dirac nodes and the ladder of band inversions in NiTe2 support unique topological surface states with chiral spin texture over a wide range of energies. Our work paves the way for the exploitation of the low-energy type-II Dirac fermions in NiTe2 in the fields of spintronics, infrared plasmonics, and ultrafast optoelectronics.

引用

页数：7

共 56 条

[41] Dirac semimetal and topological phase transitions in A3Bi (A = Na, K, Rb) [J].

Wang, Zhijun ;

Sun, Yan ;

Chen, Xing-Qiu ;

Franchini, Cesare ;

Xu, Gang ;

Weng, Hongming ;

Dai, Xi ;

Fang, Zhong .

PHYSICAL REVIEW B, 2012, 85 (19)

[42] Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides [J].

Weng, Hongming ;

Fang, Chen ;

Fang, Zhong ;

Bernevig, B. Andrei ;

Dai, Xi .

PHYSICAL REVIEW X, 2015, 5 (01)

[43] Double Dirac Semimetals in Three Dimensions [J].

Wieder, Benjamin J. ;

Kim, Youngkuk ;

Rappe, A. M. ;

Kane, C. L. .

PHYSICAL REVIEW LETTERS, 2016, 116 (18)

[44] WannierTools: An open-source software package for novel topological materials [J].

Wu, QuanSheng ;

Zhang, ShengNan ;

Song, Hai-Feng ;

Troyer, Matthias ;

Soluyanov, Alexey A. .

COMPUTER PHYSICS COMMUNICATIONS, 2018, 224 :405-416

[45] Topological Type-II Dirac Fermions Approaching the Fermi Level in a Transition Metal Dichalcogenide NiTe2 [J].

Xu, Chunqiang ;

Li, Bin ;

Jiao, Wenhe ;

Zhou, Wei ;

Qian, Bin ;

Sankar, Raman ;

Zhigadlo, Nikolai D. ;

Qi, Yanpeng ;

Qian, Dong ;

Chou, Fang-Cheng ;

Xu, Xiaofeng .

CHEMISTRY OF MATERIALS, 2018, 30 (14) :4823-4830

[46] Discovery of Lorentz-violating type II Weyl fermions in LaAlGe [J].

Xu, Su-Yang ;

Alidoust, Nasser ;

Chang, Guoqing ;

Lu, Hong ;

Singh, Bahadur ;

Belopolski, Ilya ;

Sanchez, Daniel S. ;

Zhang, Xiao ;

Bian, Guang ;

Zheng, Hao ;

Husanu, Marious-Adrian ;

Bian, Yi ;

Huang, Shin-Ming ;

Hsu, Chuang-Han ;

Chang, Tay-Rong ;

Jeng, Horng-Tay ;

Bansil, Arun ;

Neupert, Titus ;

Strocov, Vladimir N. ;

Lin, Hsin ;

Jia, Shuang ;

Hasan, M. Zahid .

SCIENCE ADVANCES, 2017, 3 (06)

[47]

Xu SY, 2015, NAT PHYS, V11, P748, DOI [10.1038/NPHYS3437, 10.1038/nphys3437]

[48] Discovery of a Weyl fermion semimetal and topological Fermi arcs [J].

Xu, Su-Yang ;

Belopolski, Ilya ;

Alidoust, Nasser ;

Neupane, Madhab ;

Bian, Guang ;

Zhang, Chenglong ;

Sankar, Raman ;

Chang, Guoqing ;

Yuan, Zhujun ;

Lee, Chi-Cheng ;

Huang, Shin-Ming ;

Zheng, Hao ;

Ma, Jie ;

Sanchez, Daniel S. ;

Wang, BaoKai ;

Bansil, Arun ;

Chou, Fangcheng ;

Shibayev, Pavel P. ;

Lin, Hsin ;

Jia, Shuang ;

Hasan, M. Zahid .

SCIENCE, 2015, 349 (6248) :613-617

[49] Lorentz-violating type-II Dirac fermions in transition metal dichalcogenide PtTe2 [J].

Yan, Mingzhe ;

Huang, Huaqing ;

Zhang, Kenan ;

Wang, Eryin ;

Yao, Wei ;

Deng, Ke ;

Wan, Guoliang ;

Zhang, Hongyun ;

Arita, Masashi ;

Yang, Haitao ;

Sun, Zhe ;

Yao, Hong ;

Wu, Yang ;

Fan, Shoushan ;

Duan, Wenhui ;

Zhou, Shuyun .

NATURE COMMUNICATIONS, 2017, 8

[50] Prediction of Triple Point Fermions in Simple Half-Heusler Topological Insulators [J].

Yang, Hao ;

Yu, Jiabin ;

Parkin, Stuart S. P. ;

Felser, Claudia ;

Liu, Chao-Xing ;

Yan, Binghai .

PHYSICAL REVIEW LETTERS, 2017, 119 (13)

← 1 2 3 4 5 6 →