Optical evidence for symmetry changes above the Neel temperature in KCuF3

Details Optical evidence for symmetry changes above the Neel temperature in KCuF3 Optical evidence for symmetry changes above the Neel temperature in KCuF3

2008-09-03

arxiv.org/abs/0809.0666v1

Phys. Rev. Lett. 101, 157406 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.101.157406

We report on optical measurements of the 1D Heisenberg antiferromagnet KCuF3. The crystal-field excitations of the Cu2+ ions have been observed and their temperature dependence can be understood in terms of magnetic and exchange-induced dipole mechanisms and vibronic interactions. Above T_N we observe a new temperature scale T_S characterized by the emergence of narrow absorption features that correlate with changes of the orbital ordering as observed by Paolasini et al. [Phys. Rev. Lett. 88, 106403 (2002)]. The appearance of these optical transitions provides evidence for a symmetry change above the Neel temperature that affects the orbital ordering and paves the way for the antiferromagnetic ordering.

Affiliated with

Also associated with

No associations

Rating

Optical evidence for symmetry changes above the Neel temperature in KCuF3 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 Optical evidence for symmetry changes above the Neel temperature in KCuF3, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical evidence for symmetry changes above the Neel temperature in KCuF3 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-105004