论文标题
在稀释2D孔系统中，具有强相互作用的稀释阶段的初期形成
Incipient Formation of the Reentrant Insulating Phase in a Dilute 2D Hole System with Strong Interactions
论文作者
论文摘要
在强烈相互作用的2D载波系统中，文献中已经报道了在低磁场中的新的重入绝缘阶段（RIP），并被认为与Wigner晶体的形成有关[例如， Qiu等人，PRL 108，106404（2012）]。我们已经研究了GAAS量子井中具有较大相互作用参数$ r_s $（〜20-30）的稀有2D孔系统中金属液相与低场撕裂之间的转换。而不是急剧过渡，而是增加密度（或降低$ r_s $）将撕裂驱动到与金属2D孔液体并存的状态。非平凡的温度依赖性电阻率和平面磁场引起的RIP的增强突出了两个阶段之间的竞争和自旋在该混合阶段的基本作用，并且与wigner晶体和费米液体混合物中的pomeranchuk效应一致。
A new reentrant insulating phase (RIP) in low magnetic fields has been reported in the literature in strongly interacting 2D carrier systems and was suggested to be related to the formation of a Wigner crystal [e.g. Qiu et al, PRL 108, 106404 (2012)]. We have studied the transformation between the metallic liquid phase and the low field RIP in a dilute 2D hole system with large interaction parameter $r_s$ (~20-30) in GaAs quantum wells. Instead of a sharp transition, increasing density (or lowering $r_s$) drives the RIP into a state where an incipient RIP coexists with the metallic 2D hole liquid. The non-trivial temperature dependent resistivity and the in-plane magnetic field induced enhancement of the RIP highlight the competition between two phases and the essential role of spin in this mixture phase, and are consistent with the Pomeranchuk effect in a mixture of Wigner crystal and Fermi liquid.
