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- W2993164967 abstract "The temperature dependence of the upper critical field ($H_{c2}$) in RbCr$% _{3}$As$_{3}$ single crystals ($T_{c}approx $ 7.3 K) has been determined by means of magnetoresistance measurements with temperature down to 0.35 K in static magnetic fields up to 38 T. The magnetic field was applied both for directions parallel ($Hparallel c $, $H_{c2}^{parallel c}$) and perpendicular ($Hperp c$, $H_{c2}^{perp c}$) to the Cr chains. The curves $H_{c2}^{parallel c}(T)$ and $H_{c2}^{perp c}(T)$ cross at $sim $ 5.5 K. As a result, the anisotropy parameter $gamma (T)=H_{c2}^{perp c}/H_{c2}^{parallel c}(T)$ increases from 0.5 near $T_{c}$ to 1.6 at low temperature. Fitting with the Werthamer-Helfand-Hohenberg (WHH) model yields zero-temperature critical fields of $mu_0H_{c2}^{parallel c}(0)approx $ 27.2 T and $mu_0H_{c2}^{perp c}(0)approx $ 43.4 T, both exceeding the BCS weak-coupling Pauli limit $mu_0H_{p}=1.84T_{c}=13.4$ T. The results indicate that the paramagnetic pair breaking effect is strong for $H parallel c$ but absent for $H perp c$, which was further confirmed by the angle dependent magnetoresistance and $H_{c2}$ measurements." @default.
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- W2993164967 date "2019-12-23" @default.
- W2993164967 modified "2023-10-17" @default.
- W2993164967 title "Upper critical field and its anisotropy in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi mathvariant=normal>RbCr</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>As</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>" @default.
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- W2993164967 doi "https://doi.org/10.1103/physrevb.100.214512" @default.
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