Spin transport theory in ferromagnet/semiconductor systems with non-collinear magnetization configurations

Abstract

We present a comprehensive theory of spin transport in a non-degenerate semiconductor that is in contact with multiple ferromagnetic terminals. The spin dynamics in the semiconductor is studied during a perturbation of a general, non-collinear magnetization configuration and a method is shown to identify the various configurations from current signals. The conventional Landauer-Büttiker description for spin transport across Schottky contacts is generalized by the use of a non-linearized I-V relation, and it is extended by taking into account non-coherent transport mechanisms. The theory is used to analyze a three terminal lateral structure where a significant difference in the spin accumulation profile is found when comparing the results of this model with the conventional model.

17 pages, 10 figures

References in corpus (15)

• Electrical Detection of Spin Transport in Lateral Ferromagnet-Semiconductor Devices
• Electronic measurement and control of spin transport in Silicon
• Coherent spin transport through a 350-micron-thick Silicon wafer
• Electrical Detection of Spin Accumulation at a Ferromagnet-Semiconductor Interface
• Determination of Interface Atomic Structure and Its Impact on Spin Transport Using Z-Contrast Microscopy and Density-Functional Theory
• Hot-electron effect in spin dephasing in $n$-type GaAs quantum wells
• Spin extraction theory and its relevance to spintronics
• Reversal of spin polarization in Fe/GaAs (001) driven by resonant surface states: First-principles calculations
• Bias-controlled sensitivity of ferromagnet/semiconductor electrical spin detectors
• Spin-dependent tunneling in modulated structures of (Ga,Mn)As
• Spin polarization control through resonant states in an Fe/GaAs Schottky barrier
• Spin dynamics in a compound semiconductor spintronic structure with a Schottky barrier
• Signal propagation in time-dependent spin transport
• Electric readout of magnetization dynamics in a ferromagnet-semiconductor system
• Spin transfer torques in nonlocal lateral spin valve

Cited by in corpus (13)

• Spin precession and inverted Hanle effect in a semiconductor near a finite-roughness ferromagnetic interface
• Analysis of phonon-induced spin relaxation processes in silicon
• Spin injection and detection up to room temperature in Heusler~alloy/$n$-GaAs spin valves
• Injection and detection of spin in a semiconductor by tunneling via interface states
• Bias current dependence of spin accumulation signals in a silicon channel detected by a Schottky tunnel contact
• Large spin accumulation voltages in epitaxial Mn5Ge3 contacts on Ge without oxide tunnel barrier
• Spin Drift in Highly Doped n-type Si
• Spin-injection spectra of CoFe/GaAs contacts: dependence on Fe concentration, interface and annealing conditions
• Suppressing spin relaxation in silicon
• Non-linear spin transport in a rectifying ferromagnet/semiconductor Schottky contact
• Modulation of Spin Accumulation by Nanoscale Confinement using Electromigration in a Metallic Lateral Spin Valve
• Effects of interface electric field on the magnetoresistance in spin device
• Manifestation of two-channel nonlocal spin transport in the shapes of the Hanle curves