Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2005-08-26
Applied Physics Letters, 88, 183108 (2006)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Changes made in response to reviewer comments
Scientific paper
10.1063/1.2200391
We show that the dominant absorption peak due to inter-subband transition in a gated quantum wire, with two occupied subbands, 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 red-shifted, and the other blue-shifted. From the relative intensity of either satellite peak, and the magnitude of the red- or blue-shift, 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 magneto-transport 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.
Bandyopadhyay Santanu
Sarkar Sourav
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