论文标题
磁性催化下的狄拉克临界效应
Dirac Kondo effect under magnetic catalysis
论文作者
论文摘要
我们开发了一种新型近藤效应在没有费米表面的系统中出现的新型近藤效应的平均场理论，而不是在强烈的磁场下出现。我们确定了近托冷凝物的大小，该凝结物是由导电费米和局部杂质组成的粒子配对。我们专注于近距效应与源性差距形成之间的竞争，这是由于导致动力学手性对称性破坏的狄拉克·费米（Dirac Fermions）之间的配对。我们发现这场竞争会导致量子关键点。我们还研究了有限温度的效果。可以使用蒙特卡洛晶格模拟来研究消失的费米密度的系统，这些模拟不会遇到符号问题。
We develop a mean-field theory of a novel Kondo effect emerging in systems without a Fermi surface, which instead emerges under strong magnetic fields. We determine the magnitude of the Kondo condensate which is a particle pairing composed of conducting Dirac fermions and localized impurities. We focus on the competition between the Kondo effect and the energy gap formation that stems from the pairing among the Dirac fermions leading to the dynamical chiral symmetry breaking. We find that this competition induces a quantum critical point. We also investigate finite-temperature effects. This system at vanishing fermion density can be studied with Monte Carlo lattice simulations which do not suffer from the sign problem.
