期刊
NANO LETTERS
卷 10, 期 8, 页码 2956-2960出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl101181e
关键词
One-dimension; spintronics; nanowire; weak antilocalization; magneto-conductance
类别
资金
- National Science Foundation [ECS-0601478]
- National Basic Research Program of China [2009CB929600, 2006CB921900]
- National Natural Science Foundation of China [10804104, 10874163, 10934006]
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.
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