Exact solution of the magnetic breakdown problem in quasi-one-dimensional geometry

Details Exact solution of the magnetic breakdown problem in quasi-one-dimensional geometry Exact solution of the magnetic breakdown problem in quasi-one-dimensional geometry

2003-11-19

arxiv.org/abs/cond-mat/0311443v1

Physics

Condensed Matter

Strongly Correlated Electrons

3 pages, 4 figures, conference ISCOM 2003

Scientific paper

10.1051/jp4:2004114029

We present exact solution of the problem of electronic wave functions of quasi one-dimensional band with an inter-band gap at the Fermi surface and in the presence of magnetic field. The details of the analyzed model are appropriate to the situation in the Bechgaard salt (TMTSF)2ClO4 with the dimerizing anion order in the transverse direction. Limiting the effects of dimerization to the standard dimerization gap only, one obtains the electronic spectrum represented through solutions of a generalized Hill system of equations with simply periodic coefficients. The resulting wave-functions are discussed. In particular, we present the solutions for the case when the electrons spend as much time in the "junctions" as on their quasi-classical orbits. On the other hand, the limit when the tunnelling approach is valid is identified and the results are confronted with the well-known Slutskin-Kadigrobov solution. Furthermore, taking into account also the presumably finite transverse dimerizing displacements of chains, one encounters the qualitatively more complex problem of a system of equations with two-periodic coefficients. Some qualitatively new properties of electronic spectrum and corresponding one-electron physical quantities in this case will be discussed in detail.

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