Spin Polarization of Single Organic Molecule Using Spin-Polarized STM

Using the effective-mass approximation method, and Floquet theory, we study the spin transport characteristics through a curved quantum nanowire. The spin polarization, P, and the tunneling magnetoresistance, TMR, are deduced under the effect of microwave and infrared radiations of wide range of frequencies. The results show an oscillatory behavior of both the spin polarization and the tunneling magnetoresistance. This is due to Fano-type resonance and the interplay between the strength of spin-orbit coupling and the photons in the subbands of the one-dimensional nanowire. The present results show that this investigation is very important, and the present device might be used to be a sensor for small strain in semiconductor nanostructures and photodetector.

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Scanning-Ion Microscopy with Polarization Analysis (Simpa)

MRS Proceedings ◽

10.1557/proc-313-723 ◽

1993 ◽

Vol 313 ◽

Cited By ~ 7

Author(s):

N. J. Zheng ◽

C. Rau

Keyword(s):

High Resolution ◽

Spin Polarization ◽

Imaging Technique ◽

Ion Beam ◽

Polarization Analysis ◽

Polarized Electrons ◽

Magnetic Structures ◽

Magnetic Imaging ◽

Spin Polarized ◽

Ion Microscopy

ABSTRACTWe have developed a novel, high-resolution magnetic imaging technique, scanning-ion microscopy with polarization analysis (SIMPA). In SIMPA, a highly-focused, scanning Ga+ ion beam is used to excite spin-polarized electrons at surfaces of ferromagnetic Materials. By Measuring the intensity and the spin polarization of the emitted electrons using a newly developed, compact mott polarimeter, topographic and magnetic images of magnetic structures are obtained. We report on first SIMPA studies on single-crystalline Fe samples.

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Spin-polarization effects in Cherenkov radiation from electrons

Canadian Journal of Physics ◽

10.1139/cjp-2019-0441 ◽

2020 ◽

Vol 98 (7) ◽

pp. 660-663

Author(s):

A.A. Peshkov

Keyword(s):

Spin Polarization ◽

Cherenkov Radiation ◽

Stokes Parameters ◽

Electron Spin Polarization ◽

Polarized Electrons ◽

Small Component ◽

Polarization Effects ◽

Spin Polarized ◽

Linearly Polarized ◽

Spin Polarization Effects

A quantum electrodynamical theory of Cherenkov radiation emitted by spin-polarized electrons moving in an isotropic medium is developed within the density matrix framework. Special attention is paid to the polarization properties of the emitted photons described by means of Stokes parameters. It is demonstrated that, although the Cherenkov radiation is primarily linearly polarized in the plane containing the direction of observation and the path of the electrons, the photons may have a small component of circular polarization of the order of 3 × 10−6 for electron kinetic energy of 500 keV due to the initial electron spin polarization, whose existence can be confirmed by sensitive measurements in the future.

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SPIN-DEPENDENT QUANTUM SIZE EFFECTS IN THE ELECTRON REFLECTIVITY OF ULTRATHIN FERROMAGNETIC CRYSTALS

Surface Review and Letters ◽

10.1142/s0218625x02003925 ◽

2002 ◽

Vol 09 (03n04) ◽

pp. 1485-1491 ◽

Cited By ~ 18

Author(s):

R. ZDYB ◽

E. BAUER

Keyword(s):

Spin Polarization ◽

Size Effects ◽

Mean Free Path ◽

Quantum Size Effects ◽

Quantum Size ◽

Spin Polarized ◽

Size Contrast ◽

Magnetic Asymmetry ◽

Inelastic Mean Free Path

We have studied the spin-dependent quantum size effects in the reflection of 0–20 eV electrons from 2–10-ML-thick Fe microcrystals grown in situ on a W(110) surface in a spin-polarized low energy electron microscope. The goal is to obtain a better understanding of the magnetic ("asymmetry") image contrast and of the limits of spin polarization devices based on the quantum size contrast. The contrast is interpreted in terms of the band structure and of the spin-dependent inelastic mean free path. For the figure of merit of spin polarization devices, an upper limit of 5 × 10-2 is obtained.

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