The upper critical field in two-band layered superconductors |
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| Authors: | Liu Min-Xia and Gan Zi-Zhao |
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| Institution: | School of Physics, State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China |
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| Abstract: | The upper critical field of clean MgB2 is investigated
using the two-band layered Ginzburg--Landau (GL) theory. The
calculated results are fitted to the experimental data of clean
MgB2 crystal very well in a broad temperature range. Based
on the GL theory for clean superconductors, a phenomenological
theory for dirty superconductor is proposed. Selecting appropriate
parameters, two-band layered GL theory is successfully applied to
the crystal of Mg(B1-xCx)2 and the neutron
irradiation samples of MgB2. |
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| Keywords: | MgB2 Ginzburg--Landau theory the upper critical field |
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