Anderson transition in systems with chiral symmetry

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Anderson localization is a universal quantum feature caused by destructive interference. On the other hand chiral symmetry is a key ingredient in different problems of theoretical physics: from nonperturbative QCD to highly doped semiconductors. We investigate the interplay of these two phenomena in the context of a three-dimensional disordered system. We show that chiral symmetry induces an Anderson transition (AT) in the region close to the band center. Typical properties at the AT such as multifractality and critical statistics are quantitatively affected by this additional symmetry. The origin of the AT has been traced back to the power-law decay of the eigenstates; this feature may also be relevant in systems without chiral symmetry.
RevTex4, 4 two-column pages, 3 .eps figures, updated references, final version as published in Phys. Rev. B

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Disordered Systems and Neural Networks, Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/120833

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0602331
 http://arxiv.org/abs/cond-mat/0602331
 Phys. Rev. B 74, 113101 (2006)
 doi:10.1103/PhysRevB.74.113101

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arXiv