Orbitally driven spin pairing in the three-dimensional nonmagnetic Mott insulator BaVS3: Evidence from single-crystal studies
Abstract
Static electrical and magnetic properties of single crystal BaVS3 were measured over the structural (TS=240 K), metal insulator (TMI=69 K), and suspected orbital ordering (TX=30 K) transitions. The resistivity is almost isotropic both in the metallic and insulating states. An anomaly in the magnetic anisotropy at TX signals a phase transition to an ordered low-T state. The results are interpreted in terms of orbital ordering and spin pairing within the lowest crystal-field quasidoublet. The disordered insulator at TX<T<TMI is described as a classical liquid of nonmagnetic pairs.
- Publication:
-
Physical Review B
- Pub Date:
- March 2000
- DOI:
- 10.1103/PhysRevB.61.R7831
- arXiv:
- arXiv:cond-mat/9911122
- Bibcode:
- 2000PhRvB..61.7831M
- Keywords:
-
- 71.27.+a;
- 71.30.+h;
- 72.80.Ga;
- 75.10.Dg;
- Strongly correlated electron systems;
- heavy fermions;
- Metal-insulator transitions and other electronic transitions;
- Transition-metal compounds;
- Crystal-field theory and spin Hamiltonians;
- Condensed Matter - Strongly Correlated Electrons;
- Condensed Matter - Materials Science
- E-Print:
- 4 pages, 5 figures, revtex, epsf, and multicol style. Problem with figures fixed. To appear in Phys. Rev. B Rap. Comm