Orbital ordering and spin-singlet clusters in triangular-based vanadates

Yasuhiro Shimizu, Kenichiro Matsudaira, Masayuki Itoh, Takamasa Kajita, Miho Ikeda, Jun Miyazaki, Takuro Katsufuji

研究成果: Conference article査読

1 被引用数 (Scopus)


We report 51V NMR spectra in the triangular-lattice vanadates, AV10O15, (3d2.2), AV13O18 (3d2.38), and A2V13O22 (3d 1.92) (A = Ba, Sr). These compounds have orbital degrees of freedom and itinerant electrons arising from the partially occupied t2g bands. We show microscopic observations of spin-singlet trimers and antiferromagnetic tertramers with orbital orders in BaV10O 15, but no indication of the orbital order and the spin singlet in SrV10O15. The paramagnetic and nonmagnetic spins coexist in BaV13O22 but only the nonmagnetic spins are present in AV13O18 (A = Ba, Sr). The spin singlet formation in the incommensurate band filling is understood as the incommensurate charge-density wave induced by the 3d orbital order.

ジャーナルJournal of Physics: Conference Series
出版ステータスPublished - 2012
イベント26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China
継続期間: 2011 8 102011 8 17

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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