摘要翻译：
在费米面不匹配的两种费米子体系中研究了不同类型的超流基态。这项研究与冷原子系统、凝聚态物理和夸克物质有关。本文在费米子准粒子可以相互转化且只有其总数守恒的情况下考虑这个问题。我们用BCS近似研究了带间和带内相互作用的双能带金属体系的超导电性。调谐能带间的杂化会改变费米面的失配，产生不同的不稳定性。对于带间吸引相互作用，我们发现一个一级正态超导体和一个具有无隙激发的均匀亚稳相。在带内相互作用的情况下，随着杂化的增加，从超导体到正态的转变是连续的，并与一个量子临界点相关联。同时还考虑了两种相互作用都存在的情况。
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英文标题：
《Asymmetric superconductivity in metallic systems》
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作者：
Mucio A. Continentino, Igor T. Padilha
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最新提交年份：
2007
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分类信息：

一级分类：Physics        物理学
二级分类：Superconductivity        超导电性
分类描述：Superconductivity: theory, models, experiment.  Superflow in helium
超导：理论，模型，实验。氦中超流
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一级分类：Physics        物理学
二级分类：Superconductivity        超导电性
分类描述：Superconductivity: theory, models, experiment.  Superflow in helium
超导：理论，模型，实验。氦中超流
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一级分类：Physics        物理学
二级分类：Statistical Mechanics        统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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一级分类：Physics        物理学
二级分类：Strongly Correlated Electrons        强关联电子
分类描述：Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
量子磁学，非费米液体，自旋液体，量子临界性，电荷密度波，金属-绝缘体跃迁
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一级分类：Physics        物理学
二级分类：High Energy Physics - Theory        高能物理-理论
分类描述：Formal aspects of quantum field theory. String theory, supersymmetry and supergravity.
量子场论的形式方面。弦理论，超对称性和超引力。
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英文摘要：
  Different types of superfluid ground states have been investigated in systems of two species of fermions with Fermi surfaces that do not match. This study is relevant for cold atomic systems, condensed matter physics and quark matter. In this paper we consider this problem in the case the fermionic quasi-particles can transmute into one another and only their total number is conserved. We use a BCS approximation to study superconductivity in two-band metallic systems with inter and intra-band interactions. Tuning the hybridization between the bands varies the mismatch of the Fermi surfaces and produces different instabilities. For inter-band attractive interactions we find a first order normal-superconductor and a homogeneous metastable phase with gapless excitations. In the case of intra-band interactions, the transition from the superconductor to the normal state as hybridization increases is continuous and associated with a quantum critical point. The case when both interactions are present is also considered.
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PDF链接：
https://arxiv.org/pdf/705.1201