Sun Ping, Kotliar Gabriel
Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854-8019, USA.
Phys Rev Lett. 2005 Jul 1;95(1):016402. doi: 10.1103/PhysRevLett.95.016402. Epub 2005 Jun 29.
We solve the 3D periodic Anderson model using a two impurity cluster dynamical mean field theory. We obtain the temperature versus hybridization phase diagram. Approaching the quantum critical point (QCP) both the Néel and lattice Kondo temperatures decrease and they do not cross at the lowest temperature we reached. While strong ferromagnetic spin fluctuation on the Kondo side is observed, our result suggests the critical static spin susceptibility is local in space at the QCP. We observe in the crossover region a logarithmic temperature dependence in the specific heat coefficient and spin susceptibility.
我们使用双杂质团簇动力学平均场理论求解三维周期安德森模型。我们得到了温度与杂化相图。接近量子临界点（QCP）时，奈尔温度和晶格近藤温度均降低，且在我们所能达到的最低温度下它们不会交叉。虽然在近藤一侧观察到了强铁磁自旋涨落，但我们的结果表明，在量子临界点处临界静态自旋磁化率在空间上是局域的。我们在交叉区域观察到比热系数和自旋磁化率中存在对数温度依赖性。
