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Frequency-dependent current noise through quantum-dot spin valves
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DOI：10.1103/PhysRevB.74.075328.png)
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摘要
En 中文
We study frequency-dependent current noise through a single-level quantum dot connected to ferromagnetic leads with noncollinear magnetization. We propose to use the frequency-dependent Fano factor as a tool to detect single-spin dynamics in the quantum dot. Spin precession due to an external magnetic and/or a many-body exchange field affects the Fano factor of the system in two ways. First, the tendency towards spin-selective bunching of the transmitted electrons is suppressed, which gives rise to a reduction of the low-frequency noise. Second, the noise spectrum displays a resonance at the Larmor frequency, whose line shape depends on the relative angle of the leads' magnetizations.
Keyword:
SINGLE-ELECTRON TRANSISTOR
ZERO-BIAS ANOMALIES
SHOT-NOISE
MESOSCOPIC CONDUCTORS
COHERENT TRANSPORT
TUNNEL-JUNCTION
RATE-EQUATIONS
SYSTEMS
BLOCKADE
SPECTRUM
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期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
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