Trivial topological phase of CaAgP and the topological nodal-line transition in CaAg(P1-xAsx)

被引：25

作者：

Xu, N. ^{[1
]}

Qian, Y. T. ^{[2
,3
,4
,5
,6
]}

Wu, Q. S. ^{[2
,3
]}

Autes, G. ^{[2
,3
]}

Matt, C. E. ^{[7
]}

Lv, B. Q. ^{[4
,5
,6
,7
]}

Yao, M. Y. ^{[7
]}

Strocov, V. N. ^{[7
]}

Pomjakushina, E. ^{[8
]}

Conder, K. ^{[8
]}

Plumb, N. C. ^{[7
]}

Radovic, M. ^{[7
]}

Yazyev, O. V. ^{[2
,3
]}

Qian, T. ^{[4
,5
]}

Ding, H. ^{[4
,5
,6
,9
]}

Mesot, J. ^{[2
,7
,10
]}

Shi, M. ^{[7
]}

机构：

[1] Wuhan Univ, Inst Adv Studies, Wuhan 430072, Hubei, Peoples R China

[2] Ecole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland

[3] Ecole Polytech Fed Lausanne, Natl Ctr Computat Design & Discovery Novel Mat MA, CH-1015 Lausanne, Switzerland

[4] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[5] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[6] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

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

[8] Paul Scherrer Inst, Lab Multiscale Mat Expt, CH-5232 Villigen, Switzerland

[9] Collaborat Innovat Ctr Quantum Matter, Beijing, Peoples R China

[10] Swiss Fed Inst Technol, Lab Solid State Phys, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW B | 2018年 / 97卷 / 16期

基金：

瑞士国家科学基金会;

关键词：

DIRAC SEMIMETAL; FERMI ARCS; ULTRAHIGH MOBILITY; WEYL NODES; DISCOVERY; MAGNETORESISTANCE;

D O I：

10.1103/PhysRevB.97.161111

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By performing angle-resolved photoemission spectroscopy and first-principles calculations, we address the topological phase of CaAgP and investigate the topological phase transition in CaAg(P1-xAsx). We reveal that in CaAgP, the bulk band gap and surface states with a large bandwidth are topologically trivial, in agreement with hybrid density functional theory calculations. The calculations also indicate that application of "negative" hydrostatic pressure can transform trivial semiconducting CaAgP into an ideal topological nodal-line semimetal phase. The topological transition can be realized by partial isovalent P/As substitution at x = 0.38.

引用

页数：8

共 39 条

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