论文标题
关于超级铜质中节点准粒子的动态区分性
On the dynamic distinguishability of nodal quasi-particles in overdoped cuprates
论文作者
论文摘要
la $ _ {1.67} $ sr $ _ {0.33} $ cuo $ _4 $不是超导体，其电阻率遵循纯粹的T $^2 $温度依赖性在非常低的温度下。另一方面，la $ _ {1.71} $ sr $ _ {0.29} $ cuo $ _4 $具有超导基础状态，以及其电阻率的T线性术语。在关键掺杂下方，这两个特征的伴随出现是神秘的。在这里，我注意到掺杂阈值上方的费米液体中的电子电子碰撞速率异常大。在无量纲参数$ζ$中表达的淋巴结准粒子的散射时间非常接近液体$^3 $ He中在其熔融压力下发现的东西。在后一种情况下，费米颗粒通过过量相互作用而动态区分。在动态上不可区分的情况下，节点电子将被排除在费米海。然后，这种非脱位载体会将退化的载体散布在随温度线性生长的相空间中。
La$_{1.67}$Sr$_{0.33}$CuO$_4$ is not a superconductor and its resistivity follows a purely T$^2$ temperature dependence at very low temperatures. La$_{1.71}$Sr$_{0.29}$CuO$_4$, on the other hand, has a superconducting ground state together with a T-Linear term in its resistivity. The concomitant emergence of these two features below a critical doping is mystifying. Here, I notice that the electron-electron collision rate in the Fermi liquid above the doping threshold is unusually large. The scattering time of nodal quasi-particles expressed in a dimensionless parameter $ζ$ is very close to what has been found in liquid $^3$He at its melting pressure. In the latter case, fermionic particles become dynamically distinguishable by excess of interaction. Ceasing to be dynamically indistinguishable, nodal electrons will be excluded from the Fermi sea. Such non-degenerate carriers will then scatter the degenerate ones within a phase space growing linearly with temperature.
