Violation of the Curie law in Na2V3O7 as the crystal-field and spin-orbit coupling effect

Details Violation of the Curie law in Na2V3O7 as the crystal-field and spin-orbit coupling effect Violation of the Curie law in Na2V3O7 as the crystal-field and spin-orbit coupling effect

2004-11-17

arxiv.org/abs/cond-mat/0411455v1

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages in ReVTeX4, 3 figures

Scientific paper

We have shown that the observed drastic violation of the Curie-Weiss law in Na2V3O7, reported in Phys. Rev. Lett. 90 (2003) 167202, is caused by conventional crystal-field interactions and the intra-atomic spin-orbit coupling of the V4+ ion. The fine discrete electronic structure of the 3d1 configuration, with a substantial orbital moment, is the reason for anomalous low-temperature properties of Na2V3O7. According to the Quantum Atomistic Solid-State Theory (QUASST) Na2V3O7 is expected to exhibit pronounced heavy-fermion phenomena at low temperatures. This study confirm our earlier claim that the orbital moment has to be unquenched in description of 3d-atom compounds. PACS: 71.70.E, 75.10.D Keywords: crystal-field interactions, spin-orbit coupling, orbital moment, Na2V3O7

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