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Sakai, Toru; Okamoto, Kiyomi*
Journal of Physics; Condensed Matter, 19(14), p.145231_1 - 145231_5, 2007/04
Times Cited Count：1 Percentile：6.68(Physics, Condensed Matter)The 
=1/2 frustrated spin ladder is investigated by the numerical exact diagonalization and the finite-size scaling. It is found that if the frustration is strong enough, a possible new phase with an incommensurate long-range order would appear in magnetic field.
Sato, Masahiro
no journal, ,
We study the ground state and the low-energy properties of a three-leg frustrated spin tube near the saturation, applying the spin-wave analysis and numerical exact diagonalization method. We show that a vector chiral order occurs in a sufficiently weak interchain-coupling regime. In this chiral phase, the low-energy physics is expected to belong to Tomonaga-Luttinger liquid (TLL) universality. On the other hand, for the strong interchain-coupling case, it is predicted that the chiral order vanishes, and a one or two-component TLL appears instead. In this conference, I explain these theoretical results. Furthermore, a related spin tube material ![$$rm [(CuCl_2tachH)_3Cl]Cl_2$$](/search/images/EROHE1JALMUEG3KDNRPTE3DBMNUEQKK5GNBWYXKDNRPTEJA.gif)
will also be discussed.
Kakurai, Kazuhisa; Matsuda, Masaaki; Ishii, Yoshinobu; Nagai, Satoshi*; Ikeda, Naoshi*; Kito, Hijiri*; Igawa, Naoki; Soda, Minoru*; Yasui, Yukio*; Moyoshi, Taketo*; et al.
no journal, ,
Two examples of neutron scattering investigations on the magnetic ordering process in frustrated spin system coupled to lattice and charge degrees of freedom are presented, in both cases leading to a short-ranged magnetic ground state. (1) In LuFe
O
the Fe ions are arranged to form hexagonal double layers along the rhombohedral unique axis. Detailed investigation of the ordering process revealed a magnetic ground state with short-range order along the stacking direction. (2) YBaCoO
has a structure with alternating stacking of a kagome-like and triangular lattice formed of CoO tetrahedra. Although the Co moments do not exhibit a long range ordering down to 10K, strong diffuse scattering due to the short-range ordering of the moments on the kagome-like and triangular lattices are observed.
