Contactless Microwave Hall Effect Transport in ZnSe

Abstract

Quantum well 2DEG recent effects such as Bose-gas of excitons, quantum Hall related zero resistance and ultra low doped gases in ITT-V require high quality samples. The same physics could be replicated in TI-VI compounds, but the control of the quality by transport characterization leads to difficulties related to the ohmic contacts. Measurements of the mobility of n-ZnSe samples have been performed by a contactless method at 20GHz by using a bimodal cavity resonator and a two-channel vector network analyzer. Values obtained for measured samples match with dc Hall measurements, towards an accurate determination of the mobility in quantum well TI-VI based heterostructures, where the 2DEG lies.