Gap function and density of states in the strong-coupling limit for an electron-boson system.
Gap function and density of states in the strong-coupling limit for an electron-boson system.
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电子-玻色子系统强耦合极限下的能隙函数和态密度。
DOI：
10.1103/physrevb.43.5355
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Carbotte
中科院分区：
文献类型：
--
作者：
Marsiglio;Carbotte
我们在强耦合极限{lambda}{More GT}1中计算了超导体的含频能隙函数，其中{lambda}是电子-玻色子质量重整化参数。我们发现了一个多峰函数，它导致了在由能隙决定的能量尺度上具有类准粒子共振的谱函数。这与中等耦合体系形成对比，在中等耦合体系中，结构出现在由玻色子频率决定的能量尺度上。
We have calculated the frequency-dependent gap function for a superconductor in the strong-coupling limit {lambda}{much gt}1, where {lambda} is the electron-boson mass-renormalization parameter. We find a multipeaked function which leads to a spectral function with quasiparticle-like resonances on an energy scale determined by the gap. This is in contrast to the moderate-coupling regime, {lambda}{approx}1, where structure occurs on an energy scale determined by the boson frequency.