全息理论中杂质驱动的金属-绝缘体相变
Impurity-Driven Metal-Insulator Transitions in Holography
AI总结:
本文在全息模型中研究序参量与电荷载流子密度的相互作用,发现杂质密度可驱动金属-绝缘体相变,并通过数值与解析方法及Breitenlohner-Freedman界限论证予以证实。
摘要:
在这项工作中,我们研究包含序参量与电荷载流子密度之间相互作用的全息模型中的金属-绝缘体相变。结果表明,该模型的杂质密度可以驱动相变,其有序相对应于绝缘相。直流电导率的温度行为将绝缘相与金属相区分开来。我们通过数值方法和解析计算证实了这一行为。作为副产品,我们展示了由Breitenlohner-Freedman界限论证支持的“量子相变”的存在。
英文摘要:
In this work, we study Metal-Insulator transition in a holographic model containing an interaction between the order parameter and charge-carrier density. It turns out that the impurity density of this model can drive the phase transition whose ordered phase corresponds to the insulating phase. The temperature behavior of DC conductivity distinguishes the insulating phase from the metal phase. We confirm this behavior by a numerical method and an analytic calculation. As a byproduct, we show the existence of a `quantum phase transition' supported by the Breitenlohner-Freedman bound argument.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。