Longitudinal spin density wave order in a quasi-1D Ising-like quantum antiferromagnet.
From neutron diffraction measurements on a quasi-1D Ising-like Co2+ spin compound BaCo2V2O8, we observed an appearance of a novel type of incommensurate ordering in magnetic fields. This ordering is essentially different from the Néel-type ordering, which is expected for the classical system, and the peculiar spin structure is caused by quantum fluctuation inherent in the quantum spin chain. A Tomonaga-Luttinger liquid nature characteristic of the gapless quantum 1D system is responsible for the realization of the incommensurate ordering.
Kimura
S
S
KYOKUGEN, Osaka University, Machikaneyama 1-3, Toyanaka 560-8531, Japan.
Matsuda
M
M
Masuda
T
T
Hondo
S
S
Kaneko
K
K
Metoki
N
N
Hagiwara
M
M
Takeuchi
T
T
Okunishi
K
K
He
Z
Z
Kindo
K
K
Taniyama
T
T
Itoh
M
M