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- W4313304008 abstract "By measuring magnetizations of pristine and Ta-doped ${mathrm{CsV}}_{3}{mathrm{Sb}}_{5}$ single crystals, we have carried out systematic studies on the lower critical field, critical current density, and equilibrium magnetization of this kagome system. The lower critical field has been investigated in the two typical samples, and the temperature-dependent lower critical field obtained in Ta-doped sample can be fitted by using the model with two $s$-wave superconducting gaps yielding the larger gap of $2{mathrm{ensuremath{Delta}}}_{s1}/{k}_{mathrm{B}}{T}_{mathrm{c}}=7.9phantom{rule{0.28em}{0ex}}(ifmmodepmelsetextpmfi{}1.8)$. This indicates a strong-coupling feature of the V-based superconductors. The measured magnetization hysteresis loops allow us to calculate the critical current density, which shows a very weak bulk vortex pinning. The magnetization hysteresis loops measured in these two kinds of samples can be well described by a recently proposed generalized phenomenological model, which leads to the determination of many fundamental parameters for these superconductors. Our systematic results and detailed analysis conclude that this V-based kagome system has features of strong-coupling superconductivity, relatively large Ginzburg-Landau parameter, and weak vortex coupling." @default.
- W4313304008 created "2023-01-06" @default.
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- W4313304008 date "2022-12-30" @default.
- W4313304008 modified "2023-10-14" @default.
- W4313304008 title "Strong-coupling superconductivity and weak vortex pinning in Ta-doped <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi mathvariant=normal>CsV</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>Sb</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:math> single crystals" @default.
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- W4313304008 doi "https://doi.org/10.1103/physrevb.106.214529" @default.
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