Activation study of collective excitations of the soliton-lattice phase in the ν=1 double-layer quantum Hall state

D. Terasawa, S. Kozumi, A. Fukuda, M. Morino, K. Iwata, N. Kumada, Y. Hirayama, Z. F. Ezawa, A. Sawada

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We investigate thermal excitations of the pseudospin soliton lattice in the double-layer quantum Hall (QH) state at total Landau-level filling factor ν=1 by detailed measurements of the activation energy gap, where the pseudospin represents the layer degree of freedom. In a tilted magnetic field, the activation energy gap of the double-layer ν=1 QH state shows a minimum near the phase transition point between the commensurate and incommensurate states. From a comparison of the in-plane field dependence of the activation energy gap with theories, we suggest that the minimum in the activation energy gap is due to collective modes of the soliton lattice.

Original languageEnglish
Article number073303
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number7
DOIs
Publication statusPublished - 2010 Feb 18

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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