Three-Dimensional Electronic Structure of the Type-II Weyl Semimetal WTe2

被引：63

作者：

Di Sante, Domenico ^{[1
]}

Das, Pranab Kumar ^{[2
,3
,11
]}

Bigi, C. ^{[4
]}

Ergoenenc, Z. ^{[5
]}

Guertler, N. ^{[5
]}

Krieger, J. A. ^{[6
,7
]}

Schmitt, T. ^{[8
]}

Ali, M. N. ^{[9
]}

Rossi, G. ^{[4
]}

Thomale, R. ^{[1
]}

Franchini, C. ^{[5
]}

Picozzi, S. ^{[10
]}

Fujii, J. ^{[2
]}

Strocov, V. N. ^{[8
]}

Sangiovanni, G. ^{[1
]}

Vobornik, I. ^{[2
]}

Cava, R. J.

Panaccione, G. ^{[2
]}

机构：

[1] Univ Wurzburg, Inst Theoret Phys & Astrophys, Hubland Campus Sud, D-97074 Wurzburg, Germany

[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] Univ Milan, Dipartimento Fis, Via Celoria 16, I-20133 Milan, Italy

[5] Univ Vienna, Computat Mat Phys, Sensengasse 8-8, A-1090 Vienna, Austria

[6] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

[7] ETH Honggerberg, Lab Festkorperphys, CH-8093 Zurich, Switzerland

[8] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland

[9] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[10] CNR, SPIN, Via Vetoio, I-67100 Laquila, Italy

[11] Natl Univ Singapore, Singapore Synchrotron Light Source, 5 Res Link, Singapore 117603, Singapore

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 119卷 / 02期

基金：

瑞士国家科学基金会; 奥地利科学基金会;

关键词：

MAGNETORESISTANCE; BEAMLINE; ADRESS;

D O I：

10.1103/PhysRevLett.119.026403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By combining bulk sensitive soft-x-ray angular-resolved photoemission spectroscopy and first-principles calculations we explored the bulk electron states of WTe2, a candidate type-II Weyl semimetal featuring a large nonsaturating magnetoresistance. Despite the layered geometry suggesting a two-dimensional electronic structure, we directly observe a three-dimensional electronic dispersion. We report a band dispersion in the reciprocal direction perpendicular to the layers, implying that electrons can also travel coherently when crossing from one layer to the other. The measured Fermi surface is characterized by two well-separated electron and hole pockets at either side of the Gamma point, differently from previous more surface sensitive angle-resolved photoemission spectroscopy experiments that additionally found a pronounced quasiparticle weight at the zone center. Moreover, we observe a significant sensitivity of the bulk electronic structure of WTe2 around the Fermi level to electronic correlations and renormalizations due to self-energy effects, previously neglected in first-principles descriptions.

引用

页数：6

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