Fermi liquid theory sheds light on hot electron-hole liquid in 1L−MoS2
Fermi liquid theory sheds light on hot electron-hole liquid in 1L−MoS2
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费米液体理论揭示了 1L·MoS2 中的热电子空穴液体
DOI：
10.1103/physrevb.103.075416
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发表时间：
2021
影响因子：
3.7
通讯作者：
Gundogdu, K.
中科院分区：
文献类型：
--
作者：
Wilmington, R. L.;Ardekani, H.;Rustagi, A.;Bataller, A.;Kemper, A. F.;Younts, R. A.;Gundogdu, K.
二维（2D）过渡金属二硫属化物（TMDC）在异常高温下表现出电子-空穴液体（EHL）相变。因为这些材料是原子级薄的，所以光激发导致材料膨胀。因此，在弹流相变过程中，电子能带结构的演变，由于材料的热膨胀和高激发密度下的带的重整化。具体地说，这些效应导致间接的能隙电子带结构与价带最大值位于thevalley。本文利用费米液体理论，建立了一种分析悬浮液在弹流相变过程中光致发光光谱演化的方法。由此产生的分析揭示了一个23倍的增加，每个载体的辐射复合，以及谷特定的载流子密度和带内载流子弛豫动力学。更广泛地说，结果概述了一种方法来预测临界弹流参数，发光到二维TDMC的弹流相变。
Two-dimensional (2D) transition metal dichalcogenides (TMDCs) exhibit an electron-hole liquid (EHL) phase transition at unusually high temperatures. Because these materials are atomically thin, optical excitation leads to material expansion. As a result, during the EHL phase transition, the electronic band structure evolves due to both material thermal expansion and renormalization of the bands under high excitation densities. Specifically, these effects lead to indirect gap electronic band structure with a valence band maximum located at thevalley. In this paper, we developed a methodology for analyzing the spectral evolution of the photoluminescence of suspendedduring the EHL phase transition by using Fermi liquid theory. The resulting analysis reveals a 23-fold increase in radiative recombination per carrier, as well as valley-specific carrier densities and intraband carrier relaxation kinetics in. More broadly, the results outline a methodology for predicting critical EHL parameters, shedding light onto the EHL phase transition in 2D TDMCs.