Shot noise of spin-dependent currents in ferromagnetic/semiconductor/ferromagnetic heterojunctions

2007 ◽  
Vol 102 (12) ◽  
pp. 123706 ◽  
Author(s):  
Xing-Tao An ◽  
Jian-Jun Liu
Keyword(s):  
Shot Noise ◽  
Ferromagnetic Semiconductor

Reduction of shot-noise in quantum conductors

1999 ◽  
Vol 09 (PR2) ◽  
pp. Pr2-23
Author(s):  
L. Saminadayar ◽  
A. Kumar ◽  
D. C. Glattli ◽  
Y. Jin ◽  
B. Etienne
Keyword(s):  
Shot Noise

Transport and magnetic properties of co-doped ferromagnetic semiconductor (In,Fe,Mn)As

2020 ◽  
Vol 13 (8) ◽  
pp. 083005
Author(s):  
Le Duc Anh ◽  
Taiki Hayakawa ◽  
Kohei Okamoto ◽  
Nguyen Thanh Tu ◽  
Masaaki Tanaka
Keyword(s):  
Magnetic Properties ◽  
Ferromagnetic Semiconductor ◽  
Co Doped

A Note on Shot-Noise and Reliability Modeling,

1984 ◽  
Author(s):  
A. J. Lemoine ◽  
M. L. Wenocur
Keyword(s):  
Shot Noise ◽  
Reliability Modeling

Incoherent spin current

2017 ◽  
Author(s):  
K. Ando ◽  
E. Saitoh
Keyword(s):  
Diffusion Equation ◽  
Spin Density ◽  
Spin Diffusion ◽  
Spin Injection ◽  
Spin Current ◽  
Ferromagnetic Semiconductor ◽  
Electrochemical Potential ◽  
Semiconductor Interface ◽  
Interface Resistance ◽  
Inhomogeneous Spin

This chapter introduces the concept of incoherent spin current. A diffusive spin current can be driven by spatial inhomogeneous spin density. Such spin flow is formulated using the spin diffusion equation with spin-dependent electrochemical potential. The chapter also proposes a solution to the problem known as the conductivity mismatch problem of spin injection into a semiconductor. A way to overcome the problem is by using a ferromagnetic semiconductor as a spin source; another is to insert a spin-dependent interface resistance at a metal–semiconductor interface.

Collection and counting efficiency

2017 ◽  
Author(s):  
A. G. Wright
Keyword(s):  
Quantum Efficiency ◽  
Standard Method ◽  
Shot Noise ◽  
Count Rate ◽  
Detection Efficiency ◽  
Collection Efficiency ◽  
Counting Efficiency ◽  
Single Electron ◽  
Anode Current ◽  
Secondary Electrons

Standards laboratories can provide a photocathode calibration for quantum efficiency, as a function of wavelength, but their measurements are performed with the photomultiplier operating as a photodiode. Each photoelectron released makes a contribution to the photocathode current but, if it is lost or fails to create secondary electrons at d1, it makes no contribution to anode current. This is the basis of collection efficiency, F. The anode detection efficiency, ε‎, allied to F, refers to the counting efficiency of output pulses. The standard method for determining F involves photocurrent, anode current, count rate, and the use of highly attenuating filters; F may also be measured using methods based on single-electron responses (SERs), shot noise, or the SER at the first dynode.

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