Theory of Topological Quantum Phase Transitions in 3D Noncentrosymmetric Systems

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We construct a general theory describing the topological quantum phase transitions in 3D systems with broken inversion symmetry. While the consideration of the system's codimension generally predicts the appearance of a stable metallic phase between the normal and topological insulators, it is shown that a direct topological phase transition between two insulators is also possible when an accidental band crossing occurs along directions with high crystalline symmetry. At the quantum critical point, the energy dispersion becomes quadratic along one direction while the dispersions along the other two orthogonal directions are linear, which manifests the zero chirality of the band touching point. Because of the anisotropic dispersion at quantum critical point, various thermodynamic and transport properties show unusual temperature dependence and anisotropic behaviors. DOI: 10.1103/PhysRevLett.110.086402
Publisher
AMER PHYSICAL SOC
Issue Date
2013-02
Language
English
Article Type
Article
Keywords

BLOCH ELECTRONS; INSULATOR; BITEI

Citation

PHYSICAL REVIEW LETTERS, v.110, no.8, pp.086402 - 086402

ISSN
0031-9007
DOI
10.1103/PhysRevLett.110.086402
URI
http://hdl.handle.net/10203/200023
Appears in Collection
PH-Journal Papers(저널논문)
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