Strong and Tunable Spin-Orbit Coupling of One-Dimensional Holes in Ge/Si Core/Shell Nanowires

被引：99

作者：

Hao, Xiao-Jie ^{[1
,2
]}

Tu, Tao ^{[1
]}

Cao, Gang ^{[1
]}

Zhou, Cheng ^{[1
]}

Li, Hai-Ou ^{[1
]}

Guo, Guang-Can ^{[1
]}

Fung, Wayne Y. ^{[2
]}

Ji, Zhongqing ^{[2
]}

Guo, Guo-Ping ^{[1
]}

Lu, Wei ^{[2
]}

机构：

[1] Univ Sci & Technol China, Key Lab Quantum Informat, Chinese Acad Sci, Hefei 230026, Peoples R China

[2] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA

来源：

NANO LETTERS | 2010年 / 10卷 / 08期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

One-dimension; spintronics; nanowire; weak antilocalization; magneto-conductance; WEAK-LOCALIZATION; ELECTRONS;

D O I：

10.1021/nl101181e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We investigate the low-temperature magneto-transport properties of individual Ge/Si core/shell nanowires. Negative magneto-conductance was observed, which is a signature of one-dimensional weak antilocalization of holes in the presence of strong spin-orbit coupling. The temperature and back gate dependences of phase coherence length, spin-orbit relaxation time, and background conductance were studied. Specifically, we show that the spin orbit coupling strength can be modulated by more than five folds with an external electric held. These results suggest the Ge/Si nanowire system possesses strong and tunable spin-orbit interactions and may serve as a candidate for spintronics applications.

引用

页码：2956 / 2960

页数：5

共 38 条

[1] EFFECTS OF ELECTRON-ELECTRON COLLISIONS WITH SMALL ENERGY TRANSFERS ON QUANTUM LOCALIZATION [J].

ALTSHULER, BL ;

ARONOV, AG ;

KHMELNITSKY, DE .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1982, 15 (36) :7367-7386

[2]

Awschalom DD, 2002, NANOSCI TECHNOL, P147

[3] BOUNDARY SCATTERING AND WEAK LOCALIZATION OF ELECTRONS IN A MAGNETIC-FIELD [J].

BEENAKKER, CWJ ;

VANHOUTEN, H .

PHYSICAL REVIEW B, 1988, 38 (05) :3232-3240

[4] OSCILLATORY EFFECTS AND THE MAGNETIC-SUSCEPTIBILITY OF CARRIERS IN INVERSION-LAYERS [J].

BYCHKOV, YA ;

RASHBA, EI .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1984, 17 (33) :6039-6045

[5] Electron dephasing and weak localization in sn doped In2O3 nanowires [J].

Chiquito, Adenilson J. ;

Lanfredi, Alexandre J. C. ;

de Oliveira, Rafaela F. M. ;

Pozzi, Livia P. ;

Leite, Edson R. .

NANO LETTERS, 2007, 7 (05) :1439-1443

[6] Weak localization, interaction effects, and the metallic phase in p-SiGe -: art. no. 125328 [J].

Coleridge, PT ;

Sachrajda, AS ;

Zawadzki, P .

PHYSICAL REVIEW B, 2002, 65 (12) :1-10

[7] ELECTRONIC ANALOG OF THE ELECTROOPTIC MODULATOR [J].

DATTA, S ;

DAS, B .

APPLIED PHYSICS LETTERS, 1990, 56 (07) :665-667

[8] Magnetotransport properties of individual InAs nanowires [J].

Dhara, Sajal ;

Solanki, Hari S. ;

Singh, Vibhor ;

Narayanan, Arjun ;

Chaudhari, Prajakta ;

Gokhale, Mahesh ;

Bhattacharya, Arnab ;

Deshmukh, Mandar M. .

PHYSICAL REVIEW B, 2009, 79 (12)

[9] SPIN-ORBIT COUPLING EFFECTS IN ZINC BLENDE STRUCTURES [J].

DRESSELHAUS, G .

PHYSICAL REVIEW, 1955, 100 (02) :580-586

[10] THEORY OF THE EFFECT OF SPIN-ORBIT COUPLING ON MAGNETIC RESONANCE IN SOME SEMICONDUCTORS [J].

ELLIOTT, RJ .

PHYSICAL REVIEW, 1954, 96 (02) :266-279

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