Measurements of the temperature dependence of the bubble phase

Abstract

We examine the temperature dependence of the bubble phase using the resonance in the real diagonal conductivity, Re[ σ xx ], discovered recently by Lewis et al. (Phys. Rev. Lett. 89 (2002) 136804). The peak frequency, f pk, of the resonance at base temperature of 30 mK is as much as 50% larger than at the highest temperature where a resonance is discernable. The resonance vanishes above a temperature of 80– 100 mK .