carrier localization
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2022 ◽  
Vol 140 ◽  
pp. 106411
Author(s):  
Marwa Ben Arbia ◽  
Badreddine Smiri ◽  
Ilkay Demir ◽  
Faouzi Saidi ◽  
Ismail Altuntas ◽  
...  

2022 ◽  
Vol 64 (3) ◽  
pp. 371
Author(s):  
Н.И. Бочкарева ◽  
Ю.Г. Шретер

The mechanism of carrier tunneling through the potential walls of InGaN/GaN quantum well in the p-n structures is studied by means of the deep center tunneling spectroscopy. A number of humps on the current and photocurrent tunneling spectra, as well as on the forward bias dependences of the intensity and the peak energy of photoluminescence band from the quantum well are detected. These findings allow us to propose a model of carrier localization in the quantum well that permit to relate the tunneling transparency of the potential walls of the QW to the space-charge of deep-level centers in the quantum well barriers and its changes under optical excitation and forward biasing of p-n structure.


Crystals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 23
Author(s):  
Hiroshi Ito ◽  
Motoki Matsuno ◽  
Seiu Katagiri ◽  
Shinji K. Yoshina ◽  
Taishi Takenobu ◽  
...  

Charge-transfer salts based on bis(ethylenedioxy)tetrathiafulvalene (BEDO-TTF or BO for short) provide a stable two-dimensional (2D) metallic state, while the electrical resistance often shows an upturn at low temperatures below ~10 K. Such 2D weak carrier localization was first recognized for BO salts in the Langmuir–Blodgett films fabricated with fatty acids; however, it has not been characterized in charge-transfer solid crystals. In this paper, we discuss the carrier localization of two crystalline BO charge-transfer salts with or without magnetic ions at low temperatures through the analysis of the weak negative magnetoresistance. The phase coherence lengths deduced with temperature dependence are largely dominated by the electron–electron scattering mechanism. These results indicate that the resistivity upturn at low temperatures is caused by the 2D weak localization. Disorders causing elastic scattering within the metallic domains, such as those of terminal ethylene groups, should be suppressed to prevent the localization.


2021 ◽  
pp. 2108392
Author(s):  
Leonardo R. V. Buizza ◽  
Harry C. Sansom ◽  
Adam D. Wright ◽  
Aleksander M. Ulatowski ◽  
Michael B. Johnston ◽  
...  

ACS Photonics ◽  
2021 ◽  
Author(s):  
Zhicheng Su ◽  
Naiyin Wang ◽  
Hark Hoe Tan ◽  
Chennupati Jagadish
Keyword(s):  

2021 ◽  
Vol MA2021-01 (11) ◽  
pp. 580-580
Author(s):  
Klaus Eckstein ◽  
Michael Auth ◽  
Florian Oberndorfer ◽  
Andreas Sperlich ◽  
Vladimir Dyakonov ◽  
...  

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