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Number of results
2007 | 111 | 4 | 527-536
Article title

Quantum Criticality Due to the Topological Effects in the Hubbard Model

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Abstracts
EN
We argue that in a strongly correlated electron system collective instanton excitations of the phase field (dual to the charge) arise with a great degree of stability, governed by gauge flux changes by an integer multiple of 2π. By unraveling consequences of the nontrivial topology of the charge gauge U(2) group, we found that the pinning of the chemical potential and the zero-temperature divergence of charge compressibility define a novel "hidden" quantum criticality on verge of the Mott transition governed by the protectorate of stable topological numbers rather than the Landau paradigm of the symmetry breaking.
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  • Institute for Low Temperature and Structure Research, Polish Academy of Sciences, POB 1410, 50-950 Wrocław 2, Poland
References
  • 1. L.D. Landau, Sov. Phys. JETP, 3, 920, 1957
  • 2. J. Hubbard, Proc. R. Soc. Lond. Ser. A, 276, 238, 1963; M.C. Gutzwiller, Phys. Rev. Lett., 10, 159, 1963; J. Kanamori, Prog. Theor. Phys., 30, 275, 1963
  • 3. K.A. Chao, J. Spalek, A.M. Oleś, J. Phys. C, Solid State Phys., 10, L271, 1977
  • 4. Y. Aharonov, D. Bohm, Phys. Rev., 115, 485, 1959
  • 5. V.N. Popov, Functional Integrals and Collective Excitations, Cambridge University Press, Cambridge 1987
  • 6. L.S. Schulman, Techniques and Applications of Path Integration, Wiley, New York 1981
  • 7. H.J. Schulz, Phys. Rev. Lett., 65, 2462, 1990
  • 8. N.F. Mott, Metal-Insulator Transitions, Taylor& Francis, London 1990
  • 9. T.K. Kopeć, Phys. Rev. B, 73, 104505, 2006
  • 10. G. Morandi, The Role of Topology in Classical and Quantum Physics, Springer-Verlag, Berlin 1992
Document Type
Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv111n411kz
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