论文标题
磁场中的分层超导体：有效质量模型的分解
Layered superconductor in a magnetic field: breakdown of the effective masses model
论文作者
论文摘要
从理论上讲，我们在平行和垂直域中的准二维（Q2D）超导体中以零温度的上限进行临界磁场，$ h_ {c2}^{\ parallel}（\ parallel}（0）$和$ h_ {c2}}^{c2}^{\ perp} $（\ perp} $（0）$（0）$（0）$（0）$（0）$（0）$（0）。我们发现$ h_ {c2}^{\ parallel}（0）\大约0.75 \ | D H_ {C2}^{\ Parallel}/ dt | _ {T_C} T_C $和$ h_ {c2}^{\ perp}（0）\ oft 0.59 \ | dh_ {c2}^{\ perp}/ d t | _ {t_c} t_c $，其中$ | D H_ {C2}^{\ Parallel}/ DT | _ {T_C} $和$ | D H_ {C2}^{\ Perp}/ D T | _ {T_C} $是上部临界磁场的相应Ginzburg-Landau斜坡。我们的结果表明，在Q2D情况下，所谓的有效质量模型的分解，可能部分负责在许多分层超导体（包括$ MGB_2 $）中与有效质量模型的实验观察到的偏差。
We theoretically study the upper critical magnetic fields at zero temperature in a quasi-two-dimensional (Q2D) superconductor in the parallel and perpendicular fields, $H_{c2}^{\parallel}(0)$ and $H_{c2}^{\perp}$(0), respectively. We find that $H_{c2}^{\parallel}(0) \approx 0.75 \ | d H_{c2}^{\parallel}/ dT|_{T_c} T_c $ and that $H_{c2}^{\perp}(0) \approx 0.59 \ | dH_{c2}^{\perp}/ d T|_{T_c} T_c$, where $| d H_{c2}^{\parallel}/ dT|_{T_c}$ and $| d H_{c2}^{\perp}/ d T|_{T_c}$ are the corresponding Ginzburg-Landau slopes of the upper critical magnetic fields. Our results demonstrate the breakdown of the so-called effective mass model in Q2D case and may be partially responsible for the experimentally observed deviations from the effective mass model in a number of layered superconductors, including $MgB_2$.
