Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2012-01-22
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
10 pages, 10 figures
Scientific paper
Using four-terminal Landauer-B\"{u}ttiker formalism and Green's function technique, in this present paper, we calculate numerically spin Hall conductance (SHC) and longitudinal conductance of a finite size kagome lattice with Rashba spin-orbit (SO) interaction both in presence and absence of external magnetic flux in clean limit. In the absence of magnetic flux, we observe that depending on the Fermi surface topology of the system SHC changes its sign at different values of Fermi energy, along with the band center. Unlike the infinite system (where SHC is a universal constant $\pm \frac{e}{8 \pi}$), here SHC depends on the external parameters like SO coupling strength, Fermi energy, etc. We show that in the presence of any arbitrary magnetic flux, periodicity of the system is lost and the features of SHC tends to get reduced because of elastic scattering. But again at some typical values of flux ($\phi=1/2, 1/4, 3/4..., etc.) the system retains its periodicity depending on its size and the features of spin Hall effect (SHE) reappears. Our predicted results may be useful in providing a deeper insight into the experimental realization of SHE in such geometries.
Dey Moumita
Karmakar S. N.
Maiti Santanu K.
No associations
LandOfFree
Spin Hall effect in a Kagome lattice driven by Rashba spin-orbit interaction does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spin Hall effect in a Kagome lattice driven by Rashba spin-orbit interaction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin Hall effect in a Kagome lattice driven by Rashba spin-orbit interaction will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-482933