T. Kita

activity

20032009

most citedUncommonly High Upper Critical Field in the Superconducting KOs

_{2}

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Pyrochlore

32 citations · 86 across the 6 of their papers we have counts for

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Showing 2004Show all

4 papers · 1 filter

cond-mat.supr-con2004

Conserving Gapless Mean-Field Theory for Bose-Einstein Condensates

Takafumi Kita

We formulate a conserving gapless mean-field theory for Bose-Einstein condensates on the basis of a Luttinger-Ward thermodynamic functional. It is applied to a weakly interacting u…

cond-mat.supr-con2004

Ab initio calculations of H $_{c 2}$ for Nb, NbSe2, and MgB2

Masao Arai, Takafumi Kita

We report on quantitative calculations of the upper critical field $H_{c 2}$ for clean type-II superconductors Nb, NbSe $_{2}$ , and MgB $_{2}$ using Fermi surfaces from {\em ab initio…

cond-mat.supr-con2004

{\em Ab Initio} Calculations of $H_{c 2}$ 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 $H_{c 2}$ in type-II superconductors, as first noticed by Hohenberg and Werthamer [Phys. Rev. {\…

cond-mat.supr-con2004

Nonmagnetic impurity effects in MgB $_{2}$

Koichi Watanabe, Takafumi Kita

We study nonmagnetic impurity effects in MgB $_{2}$ using the quasiclassical equations of superconductivity for a weak-coupling two-band model. Parameters in the model are fixed so…

Conserving Gapless Mean-Field Theory for Bose-Einstein Condensates

Ab initio calculations of Hc2​ for Nb, NbSe2, and MgB2

{\em Ab Initio} Calculations of Hc2​ in Type-II Superconductors: Basic Formalism and Model Calculations

Nonmagnetic impurity effects in MgB2​

Ab initio calculations of H $_{c 2}$ for Nb, NbSe2, and MgB2

{\em Ab Initio} Calculations of $H_{c 2}$ in Type-II Superconductors: Basic Formalism and Model Calculations

Nonmagnetic impurity effects in MgB $_{2}$