Spin blockade, orbital occupation and charge ordering in La_(1.5)Sr_(0.5)CoO4

Details Spin blockade, orbital occupation and charge ordering in La_(1.5)Sr_(0.5)CoO4 Spin blockade, orbital occupation and charge ordering in La_(1.5)Sr_(0.5)CoO4

2009-01-23

arxiv.org/abs/0901.3642v1

Physical Review Letters 102, 116401 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.102.116401

Using Co-L_(2,3) and O-K x-ray absorption spectroscopy, we reveal that the charge ordering in La_(1.5)Sr_(0.5)CoO4 involves high spin (S=3/2) Co^2+ and low spin (S=0) Co^3+ ions. This provides evidence for the spin blockade phenomenon as a source for the extremely insulating nature of the La_(2-x)Sr_(x)CoO4 series. The associated e_g^2 and e_g^0 orbital occupation accounts for the large contrast in the Co-O bond lengths, and in turn, the high charge ordering temperature. Yet, the low magnetic ordering temperature is naturally explained by the presence of the non-magnetic (S=0) Co^3+ ions. From the identification of the bands we infer that La_(1.5)Sr_(0.5)CoO4 is a narrow band material.

Affiliated with

Also associated with

No associations

Rating

Spin blockade, orbital occupation and charge ordering in La_(1.5)Sr_(0.5)CoO4 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 blockade, orbital occupation and charge ordering in La_(1.5)Sr_(0.5)CoO4, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin blockade, orbital occupation and charge ordering in La_(1.5)Sr_(0.5)CoO4 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-65800