Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-11-20
Phys. Rev. Lett. 102 046409 (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
10.1103/PhysRevLett.102.046409
Anomalous low temperature electronic and structural behaviour has been discovered in PbRuO3. The structure (space group Pnma, a = 5.56314(1), b = 7.86468(1), c = 5.61430(1) A) and metallic conductivity at 290 K are similar to those of SrRuO3 and other ruthenate perovskites, but a sharp metal-insulator transition at which the resistivity increases by four orders of magnitude is discovered at 90 K. This is accompanied by a first order structural transition to an Imma phase (a = 5.56962(1), b = 7.74550(1), c = 5.66208(1) A at 25 K) that shows a coupling of Ru4+ 4d orbital order to distortions from Pb2+ 6s6p orbital hybridization. The Pnma to Imma transition is an unconventional reversal of the group-subgroup symmetry relationship. No long range magnetic order is evident down to 1.5 K. Electronic structure calculations show that hybridization of Pb 6s6p and Ru 4d orbitals and strong spin-orbit coupling stabilise this previously hidden ground state for ruthenate perovskites
Argyriou Dimitri N.
Attfield Paul. J.
Fitch Andrew N.
Khomskii Daniel I.
Kimber Simon A. J.
No associations
LandOfFree
Metal-Insulator Transition and Orbital Order in PbRuO3 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 Metal-Insulator Transition and Orbital Order in PbRuO3, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metal-Insulator Transition and Orbital Order in PbRuO3 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-669375