Home  About us  Contact
 

Electron Spin (electron + spin)

Distribution by Scientific Domains
Physics and Astronomy100%

Terms modified by Electron Spin

  • electron spin resonance
    		•
  • electron spin resonance spectroscopy
    		•
  • electron spin resonance technique
    		•

    Selected Abstracts

    Electron spin and nuclear spin manipulation in semiconductor nanosystems

    PHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 14 2006
    Yoshiro Hirayama
    Abstract Manipulations of electron spin and nuclear spin have been studied in AlGaAs/GaAs semiconductor nanosystems. Non-local manipulation of electron spins has been realized by using the correlation effect between localized and mobile electron spins in a quantum dot- quantum wire coupled system. Interaction between electron and nuclear spins was exploited to achieve a coherent control of nuclear spins in a semiconductor point contact device. Using this device, we have demonstrated a fully coherent manipulation of any two states among the four spin levels of Ga and As nuclei. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

    Exciton-spin relaxation in weakly confining quantum dots due to spin,orbit interaction

    PHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 10 2006
    E. Tsitsishvili
    Abstract In weakly confining quantum structures such as interfacial islands or quantum disks the exciton-spin relaxation is governed by two independent electron and hole spin flip processes between the optically active and dark states. A microscopic theory for these transitions is presented which is based on second order spin,orbit and carrier,phonon interaction processes. We found that the sequential relaxation between bright and dark states leads to much faster exciton-spin relaxation than for strongly confining ("small") quantum dots where the dominant process stems from electron,hole exchange interaction plus hole deformation potential coupling. In addition, the fast exciton spin relaxation implies that the (exciton-bound) electron spin flip time is also much shorter than for a single electron. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

    Spin polarization in a single InAs/InP quantum dot

    PHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 11 2006
    Weidong Sheng
    Abstract We report on a theoretical study of the spin properties of electrons and holes in a single InAs/InP selfassembled quantum dot by means of an empirical tight-binding method. When the magnetic field is varied from the Faraday to Voigt configuration, electrons and holes are found to exhibit different spin polarization: the electron spin is found to follow the direction of the magnetic field while the hole spin is frozen along the growth direction of the dot. The frozen spin of holes is attributed to the dominant heavy-hole component in the hole states, which also leads to a zero in-plane g factor of holes. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

    Polarization of electron spin in two barrier system based on semimagnetic semiconductors

    PHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 4 2006
    S. B. Lev
    Abstract The spin-dependent tunneling of electrons through a two barrier semiconductor heterostructure with a semimagnetic layer was investigated. It was shown that the resonant level splitting in the semimagnetic well under an external magnetic field allows achieving a high level of spin polarization of the current flowing through the proposed spin filter. The dependence of the polarization depth on the parameters of the sample was calculated in the two component diffusion transport model. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

    Electron spin and nuclear spin manipulation in semiconductor nanosystems

    PHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 14 2006
    Yoshiro Hirayama
    Abstract Manipulations of electron spin and nuclear spin have been studied in AlGaAs/GaAs semiconductor nanosystems. Non-local manipulation of electron spins has been realized by using the correlation effect between localized and mobile electron spins in a quantum dot- quantum wire coupled system. Interaction between electron and nuclear spins was exploited to achieve a coherent control of nuclear spins in a semiconductor point contact device. Using this device, we have demonstrated a fully coherent manipulation of any two states among the four spin levels of Ga and As nuclei. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]