Tunable interactions and phase transitions in Dirac materials in a magnetic field

Z. Papić, D. A. Abanin, Y. Barlas, R. N. Bhatt

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

A partially filled Landau level (LL) hosts a variety of correlated states of matter with unique properties. The ability to control these phases requires tuning the effective electron interactions within a LL, which has been difficult to achieve in GaAs-based structures. Here we consider a class of Dirac materials in which the chiral band structure, along with the mass term, gives rise to a wide tunability of the effective interactions by the magnetic field. This tunability is such that different phases can occur in a single LL, and phase transitions between them can be driven in situ. The incompressible, Abelian and non-Abelian, liquids are stabilized in interaction regimes different from GaAs. Our study points to a realistic method of controlling the correlated phases and studying the phase transitions between them in materials such as graphene, bilayer graphene, and topological insulators.

Original languageEnglish (US)
Article number241306
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number24
DOIs
StatePublished - Dec 19 2011

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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