Spin injection in Silicon at zero magnetic field

Abstract

In this letter, we show efficient electrical spin injection into a SiGe based \textit{p-i-n} light emitting diode from the remanent state of a perpendicularly magnetized ferromagnetic contact. Electron spin injection is carried out through an alumina tunnel barrier from a Co/Pt thin film exhibiting a strong out-of-plane anisotropy. The electrons spin polarization is then analysed through the circular polarization of emitted light. All the light polarization measurements are performed without an external applied magnetic field \textit{i.e.} in remanent magnetic states. The light polarization as a function of the magnetic field closely traces the out-of-plane magnetization of the Co/Pt injector. We could achieve a circular polarization degree of the emitted light of 3 % at 5 K. Moreover this light polarization remains almost constant at least up to 200 K.

accepted in APL

References in corpus (4)

• Spintronics: Fundamentals and applications
• Theory of electrical spin injection: Tunnel contacts as a solution of the conductivity mismatch problem
• Electronic measurement and control of spin transport in Silicon
• Spin injection from perpendicular magnetized ferromagnetic $\delta$-MnGa into (Al,Ga)As heterostructures

Cited by in corpus (14)

• Spin dynamics in semiconductors
• Electrical injection and detection of spin-polarized electrons in silicon through an Fe_3Si/Si Schottky tunnel barrier
• Silicon spin communication
• Analysis of phonon-induced spin relaxation processes in silicon
• Large and robust electrical spin injection into GaAs at zero magnetic field using an ultrathin CoFeB/MgO injector
• Electrical spin injection and detection in Germanium using three terminal geometry
• Electron spin-phonon interaction symmetries and tunable spin relaxation in silicon and germanium
• Theory of Spin-Dependent Phonon-Assisted Optical Transitions in Silicon
• Electrical initialization of electron and nuclear spins in a single quantum dot at zero magnetic field
• Spin-dependent optical properties in strained silicon and germanium
• Suppressing spin relaxation in silicon
• Spin-dependent inter- and intra-valley electron-phonon scattering in germanium
• Electrical Detection of Light Helicity using a Quantum Dots based Hybrid Device at Zero Magnetic Field
• Optical spin pumping in silicon