Photoluminescence signature of skyrmions at \nu = 1
  The photoluminescence spectrum of quantized Hall states near filling factor \nu = 1 is investigated theoretically. For \nu >= 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 \nu < 1 the spectrum consists of a LCP line shifted down in energy from the LCP line at \nu >= 1. The g-factor dependence of the red shift of the LCP line determines the nature of the negatively charged excitations. 
T. Portengen (1), J. R. Chapman (1), V. Nikos Nicopoulos (1), and N.   F. Johnson (1) ((1) University of Oxford)