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Observation of Phase Transitions in an Electron–Hole System Associated with Dislocation Cores in Cadmium Telluride
Bulletin of the Lebedev Physics Institute ( IF 0.6 ) Pub Date : 2020-06-11 , DOI: 10.3103/s106833562004003x
V. S. Krivobok , S. N. Nikolaev , V. S. Bagaev , E. E. Onishchenko , S. I. Chentsov , M. A. Chernopitssky , A. I. Sharkov

Abstract—

Evolution of the fine structure of dislocation microphotoluminescence lines in cadmium telluride with a decrease in the optical-excitation power density has been demonstrated at low (5 K) temperatures. The character of this evolution for each of the three bands under investigation (Y1 (~1.47 eV), Y2 (~1.49 eV), and Y3 (~1.51 eV)) indicates the existence of a transition from electron–hole plasma to exciton states. It is established that the fine structure of band Y3 at the excitation densities of 0.1–0.01 W/cm2 exhibits signs of formation of metastable states with participation of a dislocation core.


中文翻译:

碲化镉中位错核与电子-空穴系统相变的观察

摘要-

在低(5 K)温度下,随着光激发功率密度的降低,碲化镉中位错微光致发光线的精细结构得到了发展。对于研究中的三个频带(Y 1(〜1.47 eV),Y 2(〜1.49 eV)和Y 3(〜1.51 eV))中的每个频带,这种演化的特征表明存在电子空穴等离子体的跃迁激子国家。可以确定的是,在激发密度为0.1-0.01 W / cm 2的情况下,Y 3带的精细结构在位错核的参与下表现出形成亚稳态的迹象。
更新日期:2020-06-11
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