论文标题
Ginzburg-Landau扩展和上临界领域的上限障碍迷人的哈伯德模型
Ginzburg-Landau expansion and the upper critical field in disordered attractive Hubbard model
论文作者
论文摘要
我们简要审查了我们对Ginzburg的疾病影响的研究 - 安德森 - 哈伯德模型中的Landau扩展系数，在广义DMFT+$σ$近似的框架中具有吸引力。 A wide range of attractive potentials $U$ is considered - from weak coupling limit, where superconductivity is described by BCS model, to the limit of very strong coupling, where superconducting transition is related to Bose - Einstein condensation (BEC) of compact Cooper pairs, which are formed at temperatures significantly higher than the temperature of superconducting transition, as well as the wide range of disorders - from weak to strong, when该系统处于安德森过渡附近。对于相同的参数范围，我们详细研究了轨道和顺磁性上部临界场$ H_ {C2}（T）$的温度行为，这证明了由于有吸引力的潜力的增长以及强障碍的影响，这既证明异常。
We present a short review of our studies of disorder influence upon Ginzburg - Landau expansion coefficients in Anderson - Hubbard model with attraction in the framework of the generalized DMFT+$Σ$ approximation. A wide range of attractive potentials $U$ is considered - from weak coupling limit, where superconductivity is described by BCS model, to the limit of very strong coupling, where superconducting transition is related to Bose - Einstein condensation (BEC) of compact Cooper pairs, which are formed at temperatures significantly higher than the temperature of superconducting transition, as well as the wide range of disorders - from weak to strong, when the system is in the vicinity of Anderson transition. For the same range of parameters we study in detail the temperature behavior of orbital and paramagnetic upper critical field $H_{c2}(T)$, which demonstrates the anomalies both due to the growth of attractive potential and the effects of strong disordering.
