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Magnetic and electrical properties and carrier doping effects on the Fe-based host compound Sr4Sc2Fe2As2O6
S. B. Zhang, Y. F. Guo, Y. G. Shi +6
Additional charge carriers were introduced to the iron oxyarsenide Sr4Sc2Fe2As2O6 under a high-pressure condition, followed by measurements of electrical resistivity, Hall coeffici…
Uncommonly High Upper Critical Field in the Superconducting KOsO Pyrochlore
T. Shibauchi, L. Krusin-Elbaum, Y. Kasahara +10
The entire temperature dependence of the upper critical field in the -pyrochlore KOsO is obtained from high-field resistivity and magnetic measurements. Bot…
Magnetic-Field Dependences of Thermodynamic Quantities in the Vortex State of Type-II Superconductors
Koichi Watanabe, Takafumi Kita, Masao Arai
We develop an alternative method to solve the Eilenberger equations numerically for the vortex-lattice states of type-II superconductors. Using it, we clarify the magnetic-field an…
Ab initio calculations of H for Nb, NbSe2, and MgB2
Masao Arai, Takafumi Kita
We report on quantitative calculations of the upper critical field for clean type-II superconductors Nb, NbSe, and MgB using Fermi surfaces from {\em ab initio…
{\em Ab Initio} Calculations of in Type-II Superconductors: Basic Formalism and Model Calculations
Takafumi Kita, Masao Arai
Detailed Fermi-surface structures are essential to describe the upper critical field in type-II superconductors, as first noticed by Hohenberg and Werthamer [Phys. Rev. {\…