Free‐carrier transport in HgTe/CdTe superlattices Available to Purchase

Magnetotransport and phototransport measurements on molecular‐beam epitaxially grown HgTe/CdTe superlattices are discussed. A detailed analysis of the magnetic‐field‐dependent Hall data yields that mixed conduction by more than one carrier species is significant at all temperatures.The T dependence of the intrinsic carrier density has been used to characterize the band gap and the product of the electron and hole density‐of‐states effective masses. Hole mobilities >10⁵ cm²/V s are reported, as well as the first observation of hole freezeout in a HgTe/CdTe superlattice. Photo‐Hall measurements employing CO₂ laser irradiation to generate excess electrons and holes are shown to yield minority electron mobilities and free‐carrier lifetimes.