Hopping magneto-transport via nonzero orbital momentum states and organic magnetoresistance

Details Hopping magneto-transport via nonzero orbital momentum states and organic magnetoresistance Hopping magneto-transport via nonzero orbital momentum states and organic magnetoresistance

2011-10-22

arxiv.org/abs/1110.4979v1

Physics

Condensed Matter

Materials Science

4 pages, 3 figures

Scientific paper

In hopping magnetoresistance of doped insulators, an applied magnetic field shrinks the electron (hole) s-wave function of a donor or an acceptor and this reduces the overlap between hopping sites resulting in the positive magnetoresistance quadratic in a weak magnetic field, B. We extend the theory of hopping magnetoresistance to states with nonzero orbital momenta. Different from s-states, a weak magnetic field expands the electron (hole) wave functions with positive magnetic quantum numbers, m > 0, and shrinks the states with negative m in a wide region outside the point defect. This together with a magnetic-field dependence of injection/ionization rates results in a negative weak-field magnetoresistance, which is linear in B when the orbital degeneracy is lifted. The theory provides a possible explanation of a large low-field magnetoresistance in disordered pi-conjugated organic materials (OMAR).

Affiliated with

Also associated with

No associations

Rating

Hopping magneto-transport via nonzero orbital momentum states and organic magnetoresistance 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 Hopping magneto-transport via nonzero orbital momentum states and organic magnetoresistance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hopping magneto-transport via nonzero orbital momentum states and organic magnetoresistance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-564859