Evidence for a quantum spin Hall phase in graphene decorated with Bi2Te3 nanoparticles

被引：41

作者：

Hatsuda, K. ^{[1
]}

Mine, H. ^{[1
]}

Nakamura, T. ^{[2
]}

Li, J. ^{[3
]}

Wu, R. ^{[3
]}

Katsumoto, S. ^{[2
]}

Haruyama, J. ^{[1
,2
]}

机构：

[1] Aoyama Gakuin Univ, Fac Sci & Engn, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 2525258, Japan

[2] Univ Tokyo, Inst Solid State Phys, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778581, Japan

[3] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

来源：

SCIENCE ADVANCES | 2018年 / 4卷 / 11期

关键词：

TOTAL-ENERGY CALCULATIONS; TRANSITION; TRANSPORT;

D O I：

10.1126/sciadv.aau6915

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Realization of the quantum spin Hall effect in graphene devices has remained an outstanding challenge dating back to the inception of the field of topological insulators. Graphene's exceptionally weak spin-orbit coupling-stemming from carbon's low mass-poses the primary obstacle. We experimentally and theoretically study artificially enhanced spin-orbit coupling in graphene via random decoration with dilute Bi2Te3 nanoparticles. Multiterminal resistance measurements suggest the presence of helical edge states characteristic of a quantum spin Hall phase; the magnetic field and temperature dependence of the resistance peaks, x-ray photoelectron spectra, scanning tunneling spectroscopy, and first-principles calculations further support this scenario. These observations highlight a pathway to spintronics and quantum information applications in graphene-based quantum spin Hall platforms.

引用

页数：6

共 38 条

[11] Transport study of graphene adsorbed with indium adatoms [J].

Jia, Zhenzhao ;

Yan, Baoming ;

Niu, Jingjing ;

Han, Qi ;

Zhu, Rui ;

Yu, Dapeng ;

Wu, Xiaosong .

PHYSICAL REVIEW B, 2015, 91 (08)

[12] Stabilizing Topological Phases in Graphene via Random Adsorption [J].

Jiang, Hua ;

Qiao, Zhenhua ;

Liu, Haiwen ;

Shi, Junren ;

Niu, Qian .

PHYSICAL REVIEW LETTERS, 2012, 109 (11)

[13] Quantum spin Hall effect in graphene [J].

Kane, CL ;

Mele, EJ .

PHYSICAL REVIEW LETTERS, 2005, 95 (22)

[14] Fault-tolerant quantum computation by anyons [J].

Kitaev, AY .

ANNALS OF PHYSICS, 2003, 303 (01) :2-30

[15] Van der Waals density functionals applied to solids [J].

Klimes, Jiri ;

Bowler, David R. ;

Michaelides, Angelos .

PHYSICAL REVIEW B, 2011, 83 (19)

[16] Quantum spin hall insulator state in HgTe quantum wells [J].

Koenig, Markus ;

Wiedmann, Steffen ;

Bruene, Christoph ;

Roth, Andreas ;

Buhmann, Hartmut ;

Molenkamp, Laurens W. ;

Qi, Xiao-Liang ;

Zhang, Shou-Cheng .

SCIENCE, 2007, 318 (5851) :766-770

[17] Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set [J].

Kresse, G ;

Furthmuller, J .

PHYSICAL REVIEW B, 1996, 54 (16) :11169-11186

[18] From ultrasoft pseudopotentials to the projector augmented-wave method [J].

Kresse, G ;

Joubert, D .

PHYSICAL REVIEW B, 1999, 59 (03) :1758-1775

[19] Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set [J].

Kresse, G ;

Furthmuller, J .

COMPUTATIONAL MATERIALS SCIENCE, 1996, 6 (01) :15-50

[20] Quantum spin Hall effect in inverted Type-II semiconductors [J].

Liu, Chaoxing ;

Hughes, Taylor L. ;

Qi, Xiao-Liang ;

Wang, Kang ;

Zhang, Shou-Cheng .

PHYSICAL REVIEW LETTERS, 2008, 100 (23)

← 1 2 3 4 →