(e,2e) experiments with spin-polarized electrons

1996 ◽  
Vol 74 (11-12) ◽  
pp. 811-815 ◽  
Author(s):  
G. F. Hanne
Keyword(s):  
Spin Orbit ◽  
Polarized Electrons ◽  
Spin Asymmetries ◽  
Spin Effects ◽  
Exchange Effects ◽  
Spin Polarized ◽  
Theoretical Investigations ◽  
Recent Experimental Work ◽  
Orbital Orientation ◽  
The Continuum

Recent experimental work on (e,2e) coincidences involving polarized electrons is reviewed. The origin of the observed spin asymmetries are exchange effects, spin-orbit interaction of the continuum electrons, and spin-orbit coupling within the target in conjunction with orbital orientation and exchange. These mechanisms are explained in some detail. Experimental and theoretical investigations of spin effects have been performed for ionization of outer shell electrons as well as for ionization of inner shell electrons.

scholarly journals Shot noise and spin-orbit coherent control of entangled and spin-polarized electrons

2005 ◽  
Vol 72 (23) ◽  
Author(s):  
J. Carlos Egues ◽  
Guido Burkard ◽  
D. S. Saraga ◽  
John Schliemann ◽  
Daniel Loss
Keyword(s):  
Shot Noise ◽  
Coherent Control ◽  
Spin Orbit ◽  
Polarized Electrons ◽  
Spin Polarized

Spin and Spin-orbit Coupling Effects in Nickel-based Superalloys: A First-principles Study on Ni3Al Doped with Ta/W/Re

2021 ◽  
Author(s):  
Liping Liu ◽  
Jin Cao ◽  
Wei Guo ◽  
Chongyu Wang
Keyword(s):  
Electronic Structures ◽  
Formation Energy ◽  
Orbit Coupling ◽  
Heavy Elements ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Spin Effects ◽  
Element Doping ◽  
Spin Polarized ◽  
Necessary And Sufficient

Abstract Heavy elements (X = Ta/W/Re) play an important role in the performance of superalloys, which enhance the strength, anti-oxidation, creep resistance, and anti-corrosiveness of alloy materials in a high-temperature environment. In the present research, the heavy element doping effects in FCC-Ni (γ) and Ni3Al (γ') systems are investigated in terms of their thermodynamic and mechanical properties, as well as electronic structures. The lattice constant, bulk modulus, elastic constant, and dopant formation energy in non-spin, spin polarized, and spin-orbit coupling (SOC) calculations are compared. The results show that the SOC effects are important in accurate electronic structure calculations for alloys with heavy elements. We find that including spin for both γ and γ' phases is necessary and sufficient for most cases, but the dopant formation energy is sensitive to different spin effects, for instance, in the absence of SOC, even spin-polarized calculations give 1% to 9% variance in the dopant formation energy in our model. Electronic structures calculations indicate that spin polarization causes a split in the metal d states, and SOC introduces a variance in the spin-up and spin-down states of the d states of heavy metals and reduces the magnetic moment of the system.

PROPERTIES OF RESONANCE TRANSMISSION THROUGH A SEMICONDUCTOR DOUBLE-WELL STRUCTURE WITH SPIN-ORBIT COUPLING

2011 ◽  
Vol 25 (04) ◽  
pp. 561-571
Author(s):  
CHUN-LEI LI ◽  
XIAO-MING WANG ◽  
PENG ZHANG
Keyword(s):  
Orbit Coupling ◽  
Tunneling Time ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Polarized Electrons ◽  
External Bias ◽  
Mass Approximation ◽  
Electric Field Increase ◽  
Spin Polarized ◽  
Resonance Transmission

In this paper, we investigate effects of the Dresselhaus spin-orbit coupling, inter-well coupling, and external bias on the dynamics of resonance tunneling through a semiconductor double-well structure. Based on the transfer matrix technique and the single band effective-mass approximation method, the numerical results demonstrate that the transmission peaks of the spin-up and spin-down electrons split due to the Dresselhaus spin-orbit coupling in the double-well structure. As the in-plane wave vector and external electric field increase, the split becomes farther apart. There is a prominent difference between the lifetime of the quasibound energy level for different spin-polarized electrons. The spin-dependent tunneling time is obtained using the time-dependent Schrödinger equation.

scholarly journals Investigation of spin-orbit effects in the excitation of noble gases by spin-polarized electrons

1993 ◽  
Vol 47 (5) ◽  
pp. 3775-3787 ◽  
Author(s):  
J. E. Furst ◽  
W. M. K. P. Wijayaratna ◽  
D. H. Madison ◽  
T. J. Gay
Keyword(s):  
Noble Gases ◽  
Spin Orbit ◽  
Polarized Electrons ◽  
Spin Polarized
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