Spin-orbit interaction determined by antilocalization in an InSb quantum well


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American Physical Society


The magnetoresistance at temperatures below 20 K in an n-InSb/In(0.85)Al(0.15)Sb two-dimensional electron system is studied and described in terms of antilocalization due to quantum interference under strong spin-orbit interaction. The spin-orbit interaction coefficients are extracted by fitting the magnetoresistance data to an antilocalization theory distinguishing the Rashba and Dresselhaus contributions. A good agreement between magnetoresistance data and theory suggests a Rashba coefficient vertical bar alpha vertical bar approximate to 0.03 eV angstrom and a Dresselhaus coefficient gamma approximate to 490 eV angstrom(3). A strong contribution from the Dresselhaus term leads to pronounced anisotropy in the energy splitting induced by spin-orbit interaction in the two-dimensional electron dispersion.



weak-localization, 2-dimensional electrons, magnetoresistance, heterostructures, semiconductors, relaxation, precession, systems, gap, Physics


Kallaher, R. L. ; Heremans, J. J. ; Goel, N. ; et al., Feb 2010. "Spin-orbit interaction determined by antilocalization in an InSb quantum well," PHYSICAL REVIEW B 81(7): 075303. DOI: 10.1103/PhysRevB.81.075303