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Article overview
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Hopf Term for a Two-Dimensional Electron Gas | G. E. Volovik
; V. M. Yakovenko
; | Date: |
26 Mar 1997 | Journal: | Phys. Rev. Lett. 79, 3791 (1997) | Subject: | Strongly Correlated Electrons; Mesoscopic Systems and Quantum Hall Effect | cond-mat.str-el cond-mat.mes-hall hep-th | Abstract: | In this Comment on the paper by W. Apel and Yu. A. Bychkov, cond-mat/9610040 and Phys. Rev. Lett. 78, 2188 (1997), we draw attention to our prior microscopic derivations of the Hopf term for various systems and to shortcomings of the Apel-Bychkov derivation. We explain how the value of the Hopt term prefactor $Theta$ is expressed in terms of a topological invariant in the momentum space and the quantized Hall conductivity of the system. (See also related paper cond-mat/9703195) | Source: | arXiv, cond-mat/9703228 | Services: | Forum | Review | PDF | Favorites |
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