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Recombination kinetics of acceptor-bound holes in heterostructures: A probe of the local configuration of magnetically frozen electron insulators

Research output: Contribution to journalComment/debate

Published

Journal publication date15/01/1994
JournalPhysical Review B
Journal number3
Volume49
Number of pages4
Pages2242-2245
Original languageEnglish

Abstract

We show that the kinetics of recombination of holes bound at accepters from a delta-doped monolayer in a heterostructure with magnetically frozen two-dimensional (2D) electrons evolves according to the power law I(t) proportional to t(-1). This behavior is universal for any kind of 2D electron insulator (ordered or disordered) in the ultra-quantum-limit and follows over a wide time range after the photoexcitation pulse. The difference between ordered and random insulating phases shows up at the longest time delays: The ordering of electrons into a Wigner lattice yields an asymptotical single lifetime decay tail, with a recombination rate whose temperature dependence is described by the characteristic Debye-Waller-type factor.