Finite temperature crossover in the d-p model
Finite temperature crossover in the d-p model
复制标题
d-p 模型中的有限温度交叉
DOI：
10.1143/jpsj.64.1595
复制
发表时间：
1995
影响因子：
1.7
通讯作者：
Y. Kuroda
中科院分区：
文献类型：
--
作者：
Y. Ono;T. Matsuura;Y. Kuroda
我们研究了 1/ N 展开中主阶近似中辅助玻色子表示中 U d -无限 d-p 模型的有限温度特性。我们获得了在整个温度范围内有效的系统的统一描述，除以两个特征能量，即辅助玻色子共振态的结合能量 ω 0 和 O (ω 0 /10) 的相干温度 T 0 。当T ≪ T 0 时，载流子掺杂时电荷转移间隙内出现一个新的相干带（带隙内带），并且表现为具有由路廷格和规则确定的大费米表面的费米液体。带宽是载流子掺杂率和O(ω 0 )的增函数。当 T > ω 0 时，化学势低于带内能带，掺杂空穴大部分位于 O-2p 带上，形成小费米面，而 Cu-3 d 空穴的行为类似于自旋\(\frac{1}{2}\) 局域矩。在 \(T_{0}\preceq T\preceq \omega _{0}\) 处，两种极限情况之间的交叉现象是...
We investigate finite temperature properties of the U d -infinite d-p model in the auxiliary boson representation within the leading order approximation in the 1/ N -expansion. We obtain a unified description of the system valid over the whole temperature range divided by the two characteristic energies, the binding eppnergy of the resonance state of the auxiliary boson, ω 0 , and the coherence temperature, T 0 , of O (ω 0 /10). At T ≪ T 0 , a new coherent band (in-gap band) appears inside the charge-transfer gap upon carrier doping and behaves as Fermi liquid with large Fermi surface determined by the Luttinger sum rule. The band width is an increasing function of carrier doping rate and of O (ω 0 ). At T >ω 0 , the chemical potential is below the in-gap band and the doped holes are mostly on the O-2p band forming small Fermi surface, while the Cu-3 d holes behave like spin-\(\frac{1}{2}\) localized moments. At \(T_{0}\preceq T\preceq \omega _{0}\), crossover phenomena between the two limiting cases are ...
DOI：
10.1007/bf01303701
发表时间：
1986-01-01
期刊：
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER
影响因子：
--
作者：
BEDNORZ, JG;MULLER, KA
通讯作者：
MULLER, KA