Fermi surface topology and vortex state in MgB2

Dahm T, Graser S, Schopohl N (2004)
Physica C Superconductivity 408-410: 336-337.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Dahm, ThomasUniBi; Graser, S; Schopohl, N
Abstract / Bemerkung
Based on a detailed modeling of the Fermi surface topology of MgB2 we calculated the anisotropy of the upper critical field B-c2 within the two gap model. The sigma-band is modeled as a distorted cylinder and the pi-band as a half-torus, with parameters determined from bandstructure calculations. Our results show that the unusual strong temperature dependence of the B-c2 anisotropy, that has been observed recently, can be understood due to the small c-axis dispersion of the cylindrical Fermi surface sheets and the small interband pairing interaction as obtained from bandstructure calculations. We calculate the magnetic field dependence of the density of states within the vortex state for field in C-axis direction and compare with recent measurements of the specific heat on MgB2 single crystals. (C) 2004 Elsevier B.V. All rights reserved.
Stichworte
vortex state; upper critical field; magnesium diboride; specific heat
Erscheinungsjahr
2004
Zeitschriftentitel
Physica C Superconductivity
Band
408-410
Seite(n)
336-337
ISSN
0921-4534
Page URI
https://pub.uni-bielefeld.de/record/2330171

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Dahm T, Graser S, Schopohl N. Fermi surface topology and vortex state in MgB2. Physica C Superconductivity. 2004;408-410:336-337.
Dahm, T., Graser, S., & Schopohl, N. (2004). Fermi surface topology and vortex state in MgB2. Physica C Superconductivity, 408-410, 336-337. https://doi.org/10.1016/j.physc.2004.02.152
Dahm, T., Graser, S., and Schopohl, N. (2004). Fermi surface topology and vortex state in MgB2. Physica C Superconductivity 408-410, 336-337.
Dahm, T., Graser, S., & Schopohl, N., 2004. Fermi surface topology and vortex state in MgB2. Physica C Superconductivity, 408-410, p 336-337.
T. Dahm, S. Graser, and N. Schopohl, “Fermi surface topology and vortex state in MgB2”, Physica C Superconductivity, vol. 408-410, 2004, pp. 336-337.
Dahm, T., Graser, S., Schopohl, N.: Fermi surface topology and vortex state in MgB2. Physica C Superconductivity. 408-410, 336-337 (2004).
Dahm, Thomas, Graser, S, and Schopohl, N. “Fermi surface topology and vortex state in MgB2”. Physica C Superconductivity 408-410 (2004): 336-337.

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