Pump-probe nuclear magnetic resonance measurement in quantum Hall effect breakdown regime

被引：3
|
作者：
Tomimatsu, T. [1 ,2 ]
Hashimoto, K. [1 ,2 ]
Sato, K. [1 ]
Hirayama, Y. [1 ,2 ,3 ]
机构：
[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
[2] JST, ERATO Nucl Spin Elect Project, Sendai, Miyagi 9808578, Japan
[3] Tohoku Univ, WPI AIMR, Sendai, Miyagi 9808577, Japan
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 08期
关键词：
CONDUCTIVITY;
D O I：
10.1063/1.4819000
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
An electrically detected nuclear magnetic resonance (NMR) signal is studied with respect to source-drain current for current-induced nuclear-spin polarization in the quantum Hall breakdown regime. We perform pump-probe measurements to discern the effects of current pumping and probing sensitivity on the NMR signal. We find that both factors contribute to the NMR signal. Within the higher current region in particular, nuclear-spin probing sensitivity has the dominant influence on the NMR signal rather than the nuclear-spin pumping effect. The results are discussed using a model, taking the resistance change with the nuclear-spin polarization and current-induced heating into account. (C) 2013 AIP Publishing LLC.
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页数：4
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