Effect of Spin-Orbit Interactions on the 0.7 Anomaly in Quantum Point Contacts

被引：11
|
作者：
Goulko, Olga [1 ,2 ,3 ]
Bauer, Florian [1 ,2 ]
Heyder, Jan [1 ,2 ]
von Delft, Jan [1 ,2 ]
机构：
[1] Univ Munich, Arnold Sommerfeld Ctr Theoret Phys, Dept Phys, D-80333 Munich, Germany
[2] Univ Munich, Ctr NanoSci, D-80333 Munich, Germany
[3] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA
来源：
PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 26期
关键词：
TEMPERATURE-DEPENDENCE; CONDUCTANCE; QUANTIZATION; TRANSPORT; RASHBA;
D O I：
10.1103/PhysRevLett.113.266402
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study how the conductance of a quantum point contact is affected by spin-orbit interactions, for systems at zero temperature both with and without electron-electron interactions. In the presence of spin-orbit coupling, tuning the strength and direction of an external magnetic field can change the dispersion relation and hence the local density of states in the point contact region. This modifies the effect of electron-electron interactions, implying striking changes in the shape of the 0.7-anomaly and introducing additional distinctive features in the first conductance step.
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收藏
页数：5
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