Spin-orbit origin of large reduction of the effective moment in Na2V3O7*

Details Spin-orbit origin of large reduction of the effective moment in Na2V3O7* Spin-orbit origin of large reduction of the effective moment in Na2V3O7*

2003-09-19

arxiv.org/abs/cond-mat/0309460v2

Physics

Condensed Matter

Strongly Correlated Electrons

14 pages, 4 figures in RevTeX4, in ver. 2 only Appendix B, B1, D, D1 have been removed. Text and figures without changes

Scientific paper

We have shown that the observed large reduction of the effective moment and the drastic violation of the Curie-Weiss law in Na2V3O7 (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 the weakly-magnetic Kramers-doublet ground state, caused by the large orbital moment, is the reason for anomalous properties of Na2V3O7. Moreover, according to the Quantum Atomistic Solid-State Theory (QUASST) Na2V3O7 is expected to exhibit pronounced heavy-fermion phenomena at low temperatures. PACS: 71.70.E, 75.10.D Keywords: crystal-field interactions, spin-orbit coupling, orbital moment, Na2V3O7

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