Infrared absorption in a quantum wire: A technique to measure different types of spin-orbit interaction strengths

被引:6
作者
Bandyopadhyay, S [1 ]
Sarkar, S [1 ]
机构
[1] Virginia Commonwealth Univ, Dept Elect & Comp Engn, Richmond, VA 23284 USA
关键词
D O I
10.1063/1.2200391
中图分类号
O59 [应用物理学];
学科分类号
摘要
We show that the dominant absorption peak due to intersubband transition in a gated quantum wire will split into a main peak and two satellite peaks if both Rashba and Dresselhaus spin-orbit interactions are present. One satellite peak will be redshifted, and the other blueshifted. From the relative intensity of either satellite peak, and the magnitude of the red- or blueshift, we can determine both Rashba and Dresselhaus interaction strengths separately, if we also carry out a Hall measurement to determine the carrier concentration and a quantized conductance step measurement to determine the energy separation between subbands. This method may be a convenient alternative to usual magnetotransport measurements used to measure spin-orbit interaction strengths. It is also more powerful because it allows us to measure the strengths of the two types of interactions separately.
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页数:3
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