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

Author(s): Papić, Z; Abanin, DA; Barlas, Y; Bhatt, Ravindra N

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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.
Publication Date: Dec-2011
Electronic Publication Date: 19-Dec-2011
Citation: Papić, Z, Abanin, DA, Barlas, Y, Bhatt, RN. (2011). Tunable interactions and phase transitions in Dirac materials in a magnetic field. Physical Review B, 84 (24), 10.1103/PhysRevB.84.241306
DOI: doi:10.1103/PhysRevB.84.241306
ISSN: 1098-0121
EISSN: 1550-235X
Type of Material: Journal Article
Journal/Proceeding Title: Physical Review B
Version: Author's manuscript

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