Geodesic
Spectrum of the bloch electron in a magnetic field in a two-dimensional lattice
Teoretičeskaâ i matematičeskaâ fizika, Tome 58 (1984) no. 3, pp. 461-472 Cet article a éte moissonné depuis la source Math-Net.Ru

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The Hamiltonian of an electron in a two-dimensional lattice of point potentials in a transverse magnetic field is considered. An expression is found for the Green's function of this Hamiltonian, and from it an equation that determines the dispersion laws $\text{E}_s(\mathbf k)$ is obtained in the case of rational magnetic flux. A detailed investigation of the spectrum is made for the case of integral flux. A criterion is obtained for the conditions under which the Landau levels enter the spectrum of the lattice Hamiltonian. 
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V. A. Geiler; V. A. Margulis. Spectrum of the bloch electron in a magnetic field in a two-dimensional lattice. Teoretičeskaâ i matematičeskaâ fizika, Tome 58 (1984) no. 3, pp. 461-472. http://geodesic.mathdoc.fr/item/TMF_1984_58_3_a12/

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