掺杂全息费米系统

Doped holographic fermionic system

构建了包括两个规范场和一个中性标量场的两流体模型.数值得到渐近标量毛AdS黑膜解.模型导入了两个可调节的化学势,从而导入了可控的掺杂参数.研究了特定参数下全息费米系统的性质.研究表明随着赝标量汤川秀树耦合增大,能隙打开,标志着系统衍生出绝缘相.固定赝标量汤川秀树耦合,随着掺杂参数的增大,能隙打开的临界值减少,能隙的形成更容易.并给出了相应的温度-掺杂相图.最后,根据模型参数,将模型分类.

In this paper,we introduce a two-current model,which support an AdS black brane geometry with scalar hair.This model introduces two tunable chemical potentials,which induce unbalance of numbers and so introduce a controllable doping parameter.We study the properties of holographic fermionic system with special parameters.The study shows that with the increase of the pseudoscalar Yukawa coupling,the gap opens,which indicates the emergence of insulating phase.For the fixed the pseudoscalar Yukawa coupling,with the increase of doping parameters,the critical value of the open of the gap decreases,which indicates that the formation of gap is easier.The corresponding temperature-doping phase diagram is given.Finally,according to the model parameters,we classify the model.