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- W1784850757 abstract "We study theoretically the quantum critical phenomenon of the phase transition between the trivial insulator and the topological insulator in (3+1) dimensions, which is described by a Dirac fermion coupled to the electromagnetic field. The renormalization group (RG) equations for the running coupling constant alpha, the speed of light c and electron v are derived. The almost exact analytic solutions to these RG equations are obtained to reveal that (i) c and v approach to the common value with combination c^2v being almost unrenormalized, (ii) the RG flow of alpha is the same as that of usual QED with c^3 being replaced by c^2v, and (iii) there are two crossover momentum/energy scales separating three regions of different scaling behaviors. The dielectric and magnetic susceptibilities, angle-resolved photoemission spectroscopy (ARPES), and the behavior of the gap are discussed from this viewpoint." @default.
- W1784850757 created "2016-06-24" @default.
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- W1784850757 date "2012-05-11" @default.
- W1784850757 modified "2023-09-27" @default.
- W1784850757 title "Theory of quantum critical phenomenon in topological insulator - (3+1)D quantum electrodynamics in solids -" @default.
- W1784850757 hasPublicationYear "2012" @default.
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