Spin Transport in a Quantum Hall Insulator

被引：0
|
作者：
Zagitova, Azaliya Azatovna [1 ]
Zhuravlev, Andrey Sergeevich [1 ]
Kulik, Leonid Viktorovich [1 ]
Umansky, Vladimir [2 ]
机构：
[1] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia
[2] Weizmann Inst Sci, Braun Ctr Submicron Res, IL-76100 Rehovot, Israel
来源：
APPLIED SCIENCES-BASEL | 2021年 / 11卷 / 17期
基金：
俄罗斯基础研究基金会;
关键词：
spintronics; spin transport; excitations; low-dimensional systems; spectroscopy; the Bose-Einstein condensate; CYCLOTRON-RESONANCE; MAGNETORESISTANCE;
D O I：
10.3390/app11178131
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A novel experimental optical method, based on photoluminescence and photo-induced resonant reflection techniques, is used to investigate the spin transport over long distances in a new, recently discovered collective state-magnetofermionic condensate. The given Bose-Einstein condensate exists in a purely fermionic system (nu = 2 quantum Hall insulator) due to the presence of a non-equilibrium ensemble of spin-triplet magnetoexcitons-composite bosons. It is found that the condensate can spread over macroscopically long distances of approximately 200 mu m. The propagation velocity of long-lived spin excitations is measured to be 25 m/s.
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页数：8
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