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 language | English |
|---|---|
| Article number | 063708 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 82 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2013 |
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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 journal › Article
}
TY - JOUR
T1 - Rotation of triangular vortex lattice in the two-band superconductor MgB2
AU - Hirano, Tomoya
AU - Takamori, Kenta
AU - Ichioka, Masanori
AU - MaChida, Kazushige
PY - 2013/6
Y1 - 2013/6
N2 - 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.
AB - 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.
KW - First-principles band calculation
KW - MgB
KW - Quasiclassical eilenberger theory
KW - Two-band superconductivity
KW - Vortex lattice morphology
UR - http://www.scopus.com/inward/record.url?scp=84878933502&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84878933502&partnerID=8YFLogxK
U2 - 10.7566/JPSJ.82.063708
DO - 10.7566/JPSJ.82.063708
M3 - Article
AN - SCOPUS:84878933502
VL - 82
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 6
M1 - 063708
ER -