TY - JOUR
T1 - Electron vortex beams in a magnetic field and spin filter
AU - Chowdhury, Debashree
AU - Basu, Banasri
AU - Bandyopadhyay, Pratul
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/3/11
Y1 - 2015/3/11
N2 - We investigate the propagation of electron vortex beams in a magnetic field. It is pointed out that when electron vortex beams carrying orbital angular momentum propagate in a magnetic field, the Berry curvature associated with the scalar electron moving in a cyclic path around the vortex line is modified from that in free space. This alters the spin-orbit interaction, which affects the propagation of nonparaxial beams. The electron vortex beams with tilted vortices lead to a spin Hall effect in free space. In the presence of a magnetic field in time-space we have spin filtering such that either positive or negative spin states emerge in spin Hall currents with clustering of spin 12 states.
AB - We investigate the propagation of electron vortex beams in a magnetic field. It is pointed out that when electron vortex beams carrying orbital angular momentum propagate in a magnetic field, the Berry curvature associated with the scalar electron moving in a cyclic path around the vortex line is modified from that in free space. This alters the spin-orbit interaction, which affects the propagation of nonparaxial beams. The electron vortex beams with tilted vortices lead to a spin Hall effect in free space. In the presence of a magnetic field in time-space we have spin filtering such that either positive or negative spin states emerge in spin Hall currents with clustering of spin 12 states.
UR - http://www.scopus.com/inward/record.url?scp=84927519030&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.91.033812
DO - 10.1103/PhysRevA.91.033812
M3 - Article
AN - SCOPUS:84927519030
SN - 1050-2947
VL - 91
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 3
M1 - 033812
ER -