Impairment of double exchange mechanism in electron transport of iron pnictides

Details Impairment of double exchange mechanism in electron transport of iron pnictides Impairment of double exchange mechanism in electron transport of iron pnictides

2011-07-11

arxiv.org/abs/1107.1952v1

Physics

Condensed Matter

Materials Science

5 pages, 2 figures

Scientific paper

Double exchange mechanism is believed to favor transport along ferromagnetic directions, the failure of which in explaining the unusual resistivity anisotropy in iron pnictides is investigated. Several factors intrinsic to the microscopic mechanism of transport in iron pnictides are identified and analyzed, including the moderate Hund's coupling, low local moment, and presence of two anisotropic degenerate orbitals xz and yz. In particular, the substantial second neighbor hoppings are found to be decisive in giving results opposite to the double exchange picture. In high temperature nonmagnetic phase, orbital ordering is shown to give the right trend of resistivity anisotropy as observed experimentally, advocating its essential role in electron transport of iron pnictides.

Affiliated with

Also associated with

No associations

Rating

Impairment of double exchange mechanism in electron transport of iron pnictides 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 Impairment of double exchange mechanism in electron transport of iron pnictides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impairment of double exchange mechanism in electron transport of iron pnictides will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-137411