Phase diagram of the alternating-spin Heisenberg chain with extra isotropic three-body exchange interactions
Phase diagram of the alternating-spin Heisenberg chain with extra isotropic three-body exchange interactions
复制标题
具有额外各向同性三体交换相互作用的交替自旋海森堡链的相图
DOI:
10.1140/epjb/e2014-50423-7
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
J. Schnack
中科院分区:
文献类型:
--
作者:
N. Ivanov;J. Ummethum;J. Schnack
For the time being isotropic three-body exchange interactions are scarcely explored and mostly used as a tool for constructing various exactly solvable one-dimensional models, although, generally speaking, such competing terms in generic Heisenberg spin systems can be expected to support specific quantum effects and phases. The Heisenberg chain constructed from alternatingS= 1 andσ= 1/2 site spins defines a realistic prototype model admitting extra three-body exchange terms. Based on numerical density-matrix renormalization group (DMRG) and exact diagonalization (ED) calculations, we demonstrate that the additional isotropic three-body terms stabilize a variety of partially-polarized states as well as two specific non-magnetic states including a critical spin-liquid phase controlled by two Gaussinal conformal theories as well as a critical nematic-like phase characterized by dominant quadrupolarS-spin fluctuations. Most of the established effects are related to some specific features of the three-body interaction such as the promotion of local collinear spin configurations and the enhanced tendency towards nearest-neighbor clustering of the spins. It may be expected that most of the predicted effects of the isotropic three-body interaction persist in higher space dimensions.
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DOI:
10.1103/physrevb.49.13223
发表时间:
1993-03
期刊:
Physical review. B, Condensed matter
影响因子:
--
作者:
de Vega HJ;Mezincescu;Nepomechie
通讯作者:
de Vega HJ;Mezincescu;Nepomechie
影响因子:
1.8
作者:
J. Schnack;M. Luban;Robert Modler
通讯作者:
Robert Modler
DOI:
10.1002/chin.201005261
发表时间:
2009
期刊:
arXiv: Strongly Correlated Electrons
影响因子:
--
作者:
N. Ivanov
通讯作者:
N. Ivanov
影响因子:
3.7
作者:
Natalia Chepiga;F. Michaud;F. Mila
通讯作者:
F. Mila
影响因子:
8.6
作者:
Karen Hallberg;Xiaoqun Wang;Peter Horsch;A. Moreo
通讯作者:
A. Moreo