J. Phys. IV France 09 (1999) Pr10-215-Pr10-218
Studies of microwave resonance in high magnetic field Wigner crystal regime of 2D hole systems in heterostructuresC.-C. Li1, L.W. Engel2, J. Yoon1, D.C. Tsui1 and M. Shayegan1
1 Department of Electrical Engineering, Princeton University, U.S.A.
2 NHMFL/FSU, 1800 E. Paul Dirac Dr, Tallahassee, FL 32306, U.S.A.
We review recent results of microwave spectroscopy on two-dimensional systems of holes in high-quality GaAs/AlxGa1-xAs heterostructures. The high magnetic field (B) insulating phase of these systems exhibits a striking microwave resonance, that is interpreted as a pinning mode of a Wigner crystal. The dependences of this resonance on B, temperature, carrier density, and dc in-plane electric field are summarized.
© EDP Sciences 1999