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arXiv 0906.4440cond-mat.mes-hall
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D类超导体的临界不动点

Critical fixed points in class D superconductors

Victor Kagalovsky, Demitry Nemirovsky

摘要:

我们详细研究的Cho-Fisher网络模型分离三个不同的阶段:金属和两个不同的本地化阶段,具有不同的量子化热霍尔电导的相图上的临界线。这个系统描述了无序超导体中的非相互作用准粒子,它们既没有时间反演也没有自旋旋转不变性。我们发现,除了一个三临界固定点$W_T$的临界线上存在一个额外的排斥固定点$W_N$(其中的涡旋无序浓度$W_N<W_T$),它分裂RG流到相反的方向:朝着一个干净的伊辛模型在W=0和朝着$W_T$。

英文摘要:

We study in detail a critical line on the phase diagram of the Cho-Fisher network model separating three different phases: metallic and two distinct localized phases with different quantized thermal Hall conductances. This system describes non-interacting quasiparticles in disordered superconductors that have neither time-reversal nor spin-rotational invariance. We find that in addition to a tricritical fixed point $W_T$ on that critical line there exist an additional repulsive fixed point $W_N$ (where the vortex disorder concentration $W_N<W_T$), which splits RG flow into opposite directions: toward a clean Ising model at W=0 and toward $W_T$.

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。

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