Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-07-04
Physics
Condensed Matter
Strongly Correlated Electrons
14 pages, including 4 figures and 1 table, accepted for publication in PRL
Scientific paper
10.1103/PhysRevLett.99.196601
NaV2O4 crystals were grown under high pressure using a NaCl flux, and the crystals were characterized with X-ray diffraction, electrical resistivity, heat capacity, and magnetization. The structure of NaV2O4 consists of double chains of edge-sharing VO6 octahedra. The resistivity is highly anisotropic, with the resistivity perpendicular to the chains more than 20 times greater than that parallel to the chains. Magnetically, the intrachain interactions are ferromagnetic and the interchain interactions are antiferromagnetic; 3D antiferromagnetic order is established at 140 K. First principles electronic structure calculations indicate that the chains are half metallic. Interestingly, the case of NaV2O4 seems to be a quasi-1D analogue of what was found for half-metallic materials.
Arai Masato
Karki Amar B.
Mandrus David
Movshovich Roman
Okamoto Satoshi
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