Physics – Condensed Matter
Scientific paper
2003-05-05
Physics
Condensed Matter
Scientific paper
10.1103/PhysRevB.69.153301
We report an exact solution for the noise spectrum of spin-current without charge-current in a spin field effect transistor (SFET). For the SFET with two leads, it is found that both auto- and cross-correlation functions are needed to characterize the noise of spin-current. A shot noise is also generated for the charge-current even though the net charge-current is identically zero. The noise spectra of spin-current and charge-current depends on the coupling strength between the SFET and the leads, and they may behave qualitatively differently. We also present results of noise spectra in the adiabatic regime.
Guo Hong
Wang Baigeng
Wang Jian
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