scholarly journals Evaluation of spin-flip scattering in chirality-induced spin selectivity using the Riccati equation

2019 ◽  
Vol 21 (7) ◽  
pp. 3761-3770 ◽  
Author(s):  
Daniel Nürenberg ◽  
Helmut Zacharias
Keyword(s):  
Electron Transport ◽  
Riccati Equation ◽  
Chiral Molecules ◽  
Spin Flip ◽  
Spin Flips

We apply a model to search for spin-flips in spin-selective electron transport in chiral molecules.

Restricted active space spin-flip configuration interaction: Theory and examples for multiple spin flips with odd numbers of electrons

2012 ◽  
Vol 137 (16) ◽  
pp. 164110 ◽  
Author(s):  
Paul M. Zimmerman ◽  
Franziska Bell ◽  
Matthew Goldey ◽  
Alexis T. Bell ◽  
Martin Head-Gordon
Keyword(s):  
Configuration Interaction ◽  
Interaction Theory ◽  
Active Space ◽  
Spin Flip ◽  
Spin Flips

Restricted active space spin-flip (RAS-SF) with arbitrary number of spin-flips

2013 ◽  
Vol 15 (1) ◽  
pp. 358-366 ◽  
Author(s):  
Franziska Bell ◽  
Paul M. Zimmerman ◽  
David Casanova ◽  
Matthew Goldey ◽  
Martin Head-Gordon
Keyword(s):  
Arbitrary Number ◽  
Active Space ◽  
Spin Flip ◽  
Spin Flips

scholarly journals Thresholding of the Elliott-Yafet spin-flip scattering in multi-sublattice magnets by the respective exchange energies

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Artur Born ◽  
Régis Decker ◽  
Robby Büchner ◽  
Robert Haverkamp ◽  
Kari Ruotsalainen ◽  
...  
Keyword(s):  
Spin Dynamics ◽  
Coupling Constants ◽  
Temperature Dependent ◽  
Microscopic Mechanism ◽  
Magnetic Systems ◽  
Transfer Rates ◽  
X Ray ◽  
Physical Systems ◽  
Spin Flip ◽  
Spin Flips

AbstractHow different microscopic mechanisms of ultrafast spin dynamics coexist and interplay is not only relevant for the development of spintronics but also for the thorough description of physical systems out-of-equilibrium. In pure crystalline ferromagnets, one of the main microscopic mechanism of spin relaxation is the electron-phonon (el-ph) driven spin-flip, or Elliott-Yafet, scattering. Unexpectedly, recent experiments with ferro- and ferrimagnetic alloys have shown different dynamics for the different sublattices. These distinct sublattice dynamics are contradictory to the Elliott-Yafet scenario. In order to rationalize this discrepancy, it has been proposed that the intra- and intersublattice exchange interaction energies must be considered in the microscopic demagnetization mechanism, too. Here, using a temperature-dependent x-ray emission spectroscopy (XES) method, we address experimentally the element specific el-ph angular momentum transfer rates, responsible for the spin-flips in the respective (sub)lattices of Fe$$_{20}$$ 20 Ni$$_{80}$$ 80 , Fe$$_{50}$$ 50 Ni$$_{50}$$ 50 and pure nickel single crystals. We establish how the deduced rate evolution with the temperature is linked to the exchange coupling constants reported for different alloy stoichiometries and how sublattice exchange energies threshold the related el-ph spin-flip channels. Thus, these results evidence that the Elliott-Yafet spin-flip scattering, thresholded by sublattice exchange energies, is the relevant microscopic process to describe sublattice dynamics in alloys and elemental magnetic systems.

The role of ligands in electron transport in nanocrystal solids

Nanoscale ◽  
2020 ◽  
Vol 12 (45) ◽  
pp. 23028-23035
Author(s):  
Artem R. Khabibullin ◽  
Alexander L. Efros ◽  
Steven C. Erwin
Keyword(s):  
Electron Transport ◽  
Theoretical Modeling

Theoretical modeling of wavefunction overlap in nanocrystal solids elucidates the important role played by ligands in electron transport.

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