Rotation of triangular vortex lattice in the two-band superconductor MgB2

Tomoya Hirano, Kenta Takamori, Masanori Ichioka, Kazushige MaChida

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

To identify the contributions of the multiband nature and the anisotropy of a microscopic electronic structure to a macroscopic vortex lattice morphology, we develop a method based on the Eilenberger theory near Hc2 combined with the first-principles band calculation to estimate the stable vortex lattice configuration. For a typical two-band superconductor MgB2, successive transitions of vortex lattice orientation that have been observed recently by small angle neutron scattering [Das et al.: Phys. Rev. Lett. 108 (2012) 167001] are explained by the characteristic fielddependence of two-band superconductivity and the competition of sixfold anisotropy between the σ- and π-bands. The reentrant transition at low temperature reflects the Fermi velocity anisotropy of the σ-band.

Original languageEnglish
Article number063708
JournalJournal of the Physical Society of Japan
Volume82
Issue number6
DOIs
Publication statusPublished - Jun 2013

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vortices
anisotropy
neutron scattering
superconductivity
electronic structure
estimates
configurations

Keywords

  • First-principles band calculation
  • MgB
  • Quasiclassical eilenberger theory
  • Two-band superconductivity
  • Vortex lattice morphology

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Rotation of triangular vortex lattice in the two-band superconductor MgB2. / Hirano, Tomoya; Takamori, Kenta; Ichioka, Masanori; MaChida, Kazushige.

In: Journal of the Physical Society of Japan, Vol. 82, No. 6, 063708, 06.2013.

Research output: Contribution to journalArticle

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