Lifschitz tail in a magnetic field: coexistence of classical and quantum behavior in the borderline case |
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Authors: | László Erdo˝s |
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Institution: | (1) School of Mathematics, Georgia Institute of Technology, Atlanta, GA 30332, USA. e-mail: lerdos@math.gatech.edu, US |
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Abstract: | We establish the exact low-energy asymptotics of the integrated density of states (Lifschitz tail) in a homogeneous magnetic
field and Poissonian impurities with a repulsive single-site potential of Gaussian decay. It has been known that the Gaussian
potential tail discriminates between the so-called “classical” and “quantum” regimes, and precise asymptotics are known in
these cases. For the borderline case, the coexistence of the classical and quantum regimes was conjectured. Here we settle
this last remaining open case to complete the full picture of the magnetic Lifschitz tails.
Received: 28 March 2000 / Revised version: 22 December 2000 / Published online: 24 July 2001 |
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