Spin polarized electron tunneling

Spin Polarized Electron Tunneling and Magnetoresistance in Molecular Junctions... 

Meservey R, Tedrow PM (1994) Spin-polarized electron tunneling. Phys Rep 238 173-243... 

Wiesendanger, R., Giintherodt, H. J., Giintherodt, G., Gambino, R. J., and Ruf, R. (1990). Observation of vacuum tunneling of spin-polarized electrons with the scanning tunneling microscope. Phys. Rev. Lett. 65, 247—250. 

A schematic view of the nanomechanical GMR device to be considered is presented in Fig. 1. Two fully spin-polarized magnets with fully spin-polarized electrons serve as source and drain electrodes in a tunneling device. In this paper we will consider the situation when the electrodes have exactly opposite polarization. A mechanically movable quantum dot (described by a time-dependent displacement x(t)), where a single energy level is available for electrons, performs forced harmonic oscillations with period T = 2-k/uj between the leads. The external magnetic field is perpendicular to the orientation of the magnetization in both leads. 

Other sources of spin-polarized electrons. Low-energy SPEs may be produced in other ways such as circularly-polarized UV light irradiation of a surface, spin-polarized electron guns, and spin-polarized tunneling from a magnetic tip. Provided that these sources could be stabilized so that quantitative cross sections could be determined, it should be possible to perform chiral-selective surface chemistry measurements. 

In the past many attempts have been made to obtain magnetic information by making the STM sensitive to the spin of the tunneling electrons. Basically two different concepts have been used to achieve spin polarized vacuum tunneling ... 

Spin-polarized scanning tunneling spectroscopy (SPSTS) Phonon spectroscopy by inelastic electron tunneling (lET) Photoassisted tunneling spectroscopy (SFES) Tunneling-induced luminescence spectroscopy (TILS)... 

Wang W, Richter CA (2006) Spin-polarized inelastic electron tunneling spectroscopy of a molecular magnetic tunnel junction. Appl Phys Lett 89 153105... 

---