Photoluminescence signature of skyrmions at ν= 1

Abstract

The photoluminescence spectrum of quantized Hall states near filling factor ν= 1 is investigated theoretically. For ν>= 1 the spectrum consists of a right-circularly polarized (RCP) line and a left-circularly polarized (LCP) line, whose mean energy: (1) does not depend on the electron g factor for spin-1/2 quasielectrons, (2) does depend on g for charged spin-texture excitations (skyrmions). For ν< 1 the spectrum consists of a LCP line shifted down in energy from the LCP line at ν>= 1. The g-factor dependence of the red shift of the LCP line determines the nature of the negatively charged excitations.