论文标题
高-TC超导性的载波竞争相互作用
Carrier-potential interaction for high-Tc superconductivity
论文作者
论文摘要
自发现以来，高温超导性的起源已广泛争论。在这里，我们提出了一个模型，以揭示基于载体与局部电位之间相互作用的机制。在此模型中，类似于晶格点的电势由局部电荷组成，其振动介导了移动载体的耦合。建立了描述有序电位和载体之间振动，耦合和各种相互作用的哈密顿量。通过分析哈密顿量，我们发现局部电位和相互作用的振动由载体密度确定，控制过渡温度。我们表明，如果局部电势由电子组成，而移动载体是孔，则过渡温度很高，因为它们之间的耦合很强。通过用晶格点代替局部电位，我们的模型等同于BCS理论。因此，我们的模型可以对超导性提供一般的理论描述。
The origin of high-temperature superconductivity has been widely debated since its discovery. Here, we propose a model to reveal the mechanism based on the interaction between carrier and local potential. In this model, the potential that is analogous to the lattice point is composed of localized charges and its vibration mediates the coupling of mobile carriers. A Hamiltonian that describes the vibration, coupling, and various interactions among the ordered potentials and carriers is established. By analyzing the Hamiltonian, we find that the vibration of local potential and the interactions, which are determined by the carrier density, control the transition temperature. We show that the transition temperature is high if the local potential is composed of electrons and the mobile carrier is hole because of the strong coupling between them. By replacing the local potential with lattice point, our model is equivalent to the BCS theory. Therefore, our model may provide a general theoretical description on the superconductivity.
