Observation of topological nodal fermion semimetal phase in ZrSiS

被引：334

作者：

Neupane, Madhab ^{[1
]}

Belopolski, Ilya

Hosen, M. Mofazzel ^{[1
]}

Sanchez, Daniel S. ^{[2
,3
]}

Sankar, Raman ^{[4
]}

Szlawska, Maria ^{[5
]}

Xu, Su-Yang ^{[2
,3
]}

Dimitri, Klauss ^{[1
]}

Dhakal, Nagendra ^{[1
]}

Maldonado, Pablo ^{[6
]}

Oppeneer, Peter M. ^{[6
]}

Kaczorowski, Dariusz ^{[5
]}

Chou, Fangcheng ^{[4
]}

Hasan, M. Zahid ^{[2
,3
]}

Durakiewicz, Tomasz ^{[7
]}

机构：

[1] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA

[2] Princeton Univ, Joseph Henry Lab, Princeton, NJ 08544 USA

[3] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[4] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10617, Taiwan

[5] Polish Acad Sci, Inst Low Temp & Struct Res, POB 937, PL-50950 Wroclaw, Poland

[6] Uppsala Univ, Dept Phys & Astron, POB 516, S-75120 Uppsala, Sweden

[7] Los Alamos Natl Lab, Condensed Matter & Magnet Sci Grp, POB 1663, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 20期

基金：

美国国家科学基金会; 瑞典研究理事会;

关键词：

DIRAC SEMIMETALS;

D O I：

10.1103/PhysRevB.93.201104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Unveiling new topological phases of matter is one of the current objectives in condensed matter physics. Recent experimental discoveries of Dirac and Weyl semimetals prompt the search for other exotic phases of matter. Here we present a systematic angle-resolved photoemission spectroscopy study of ZrSiS, a prime topological nodal semimetal candidate. Our wider Brillouin zone (BZ) mapping shows multiple Fermi surface pockets such as the diamond-shaped Fermi surface, elliptical-shaped Fermi surface, and a small electron pocket encircling at the zone center (Gamma) point, the M point, and the X point of the BZ, respectively. We experimentally establish the spinless nodal fermion semimetal phase in ZrSiS, which is supported by our first-principles calculations. Our findings evidence that the ZrSiS-type of material family is a new platform on which to explore exotic states of quantum matter; these materials are expected to provide an avenue for engineering two-dimensional topological insulator systems.

引用

页数：6

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