We prove that the integrated density of states (IDS) for the randomly perturbed Landau Hamiltonian is Hölder continuous at all energies with any Hölder exponent < q < 1. The random Anderson-type potential is constructed with a non-negative, compactly supported single-site potential u. The distribution of the iid random variables is required to be absolutely continuous with a bounded, compactly upported density. This extends a previous result Combes et al. [Combes, J. M., Hislop, P. D., Klopp, F. (2003a). Hölder continuity of the integrated density of states for some random operators at all energies. Int. Math. Res. Notices 2003: 179-209] that was restricted to constant magnetic fields having rational flux through the unit square. We also prove that the IDS is Hölder continuous as a function of the nonzero magnetic field strength.
|Number of pages||27|
|Journal||Communications in Partial Differential Equations|
|State||Published - Jul 2004|
Bibliographical noteFunding Information:
The first author is supported by CPT, CNRS, Luminy, Marseille, France; the second author is supported in part by NSF Grant DMS-0202656; the third author is supported in part by FNS 2000 ‘‘Programme Jeunes Chercheurs’’, and by the Chilean Science Foundation Fondecyt under Grant 7020737; the fourth author is Supported in part by Chilean Science Foundation Fondecyt under Grants 1020737 and 7020737.
- Irrational flux
- Landau levels
- Magnetic fields
- Random Schrödinger operators
ASJC Scopus subject areas
- Applied Mathematics