Bond electronic polarization induced by spin

Details Bond electronic polarization induced by spin Bond electronic polarization induced by spin

2006-08-18

arxiv.org/abs/cond-mat/0608411v2

Physical Review B 74, 22444 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages including 6 figures; discussion on experiments in multiferroics added

Scientific paper

We study theoretically the electric polarization induced by noncollinear spin configurations in the limit of strong Hund coupling. We employ a model of two magnetic ions sandwitching an oxygen ion. It is shown that there appears a longitudinal polarization P_x along the bond, which is roughly proportional to (m_r^x)^2-(m_l^x)^2 where m_{r(l)}^x is the x-component of the spin orientation vector at right (left) magnetic ion. A numerical study of the model Hamiltonian yields both longitudinal and transverse electric dipole moments. The transverse polarization is shown to have a non-uniform as well as a uniform component, with the latter being consistent with the previous theory. The longitudinal polarization is non-uniform and oscillating with the period half that of the spin order, but the local magnitude is typically much larger than the uniform transverse polarization and may be detected by X-ray/neutron scattering experiments.

Affiliated with

Also associated with

No associations

Rating

Bond electronic polarization induced by spin 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 Bond electronic polarization induced by spin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bond electronic polarization induced by spin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-567331