Exciton condensation and charge fractionalization in a topological insulator film

Abstract

An odd number of gapless Dirac fermions is guaranteed to exist at a surface of a strong topological insulator. We show that in a thin-film geometry and under external bias, electron-hole pairs that reside in these surface states can condense to form a coherent exciton condensate, similar in general terms to the exciton condensate recently argued to exist in a biased graphene bilayer, but with different topological properties. Such a `topological' exciton condensate (TEC) exhibits a host of unusual properties; the most interesting among them is the fractional charge +-e/2 carried by a singly quantized vortex in the TEC order parameter.

arXiv comment4 pages, 1 figure, version to appear in PRL (minor stylistic changes). For related work and info visit http://www.physics.ubc.ca/~franz/

References in corpus (15)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Topological Insulators in Three Dimensions
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Topological Field Theory of Time-Reversal Invariant Insulators
• Topological invariants of time-reversal-invariant band structures
• Three dimensional topological invariants for time reversal invariant Hamiltonians and the three dimensional quantum spin Hall effect
• Magnetoelectric polarizability and axion electrodynamics in crystalline insulators
• Observation of the e/3 Fractionally Charged Laughlin Quasiparticles
• Bose-Einstein Condensation of Excitons in Bilayer Electron Systems
• Surface States of the Topological Insulator Bi_{1-x}Sb_x
• Electron fractionalization in two-dimensional graphenelike structures
• Room-Temperature Superfluidity in Graphene Bilayers
• Electron screening and excitonic condensation in double-layer graphene systems
• Vortices, zero modes and fractionalization in bilayer-graphene exciton condensate
• Zero-energy states and fragmentation of spin in the easy-plane antiferromagnet on a honeycomb lattice

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• Fermi Level Tuning of Epitaxial Sb2Te3 Thin Films on Graphene by Regulating Intrinsic Defects and Substrate Transfer Doping
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• Three-dimensional Topological Insulators on the Pyrochlore Lattice
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• Emergent Lorentz symmetry near fermionic quantum critical points in two and three dimensions
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