Micromechanical measurement of beating patterns in the quantum oscillatory chemical potential of InGaAs quantum wells due to spin-orbit coupling

The quantum oscillatory magnetization M(B) and chemical potential l(B) of a two-dimensional (2D) electron system provide important and complementary information about its ground state energy at low temperature T. We developed a technique that provides both quantities in the same cool-down process via a decoupled static operation and resonant excitation of a micromechanical cantilever. On InGaAs/InP heterostructures, we observed beating patterns in both M(B) and l(B) attributed to spin-orbit interaction. A significantly enhanced sensitivity in l enabled us to extract Rashba and Dresselhaus parameters with high accuracy. The technique is powerful for detailed investigations on the electronic properties of 2D materials.


Published in:
Applied Physics Letters, 107, 9, 092101
Year:
2015
Publisher:
Melville, American Institute of Physics
ISSN:
1077-3118
Keywords:
Laboratories:




 Record created 2015-11-17, last modified 2018-03-17


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