Ferrimagnetic and Long Period Antiferromagnetic Phases in High Spin Heisenberg Chains with D-Modulation

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dc.creatorHida, Kazuo
dc.date2006-10-24
dc.date.accessioned2026-07-07T07:54:41Z
dc.date.available2026-07-07T07:54:41Z
dc.descriptionThe ground state properties of the high spin Heisenberg chains with alternating single site anisotropy are investigated by means of the numerical exact daigonaization and DMRG method. It is found that the ferrimagnetic state appears between the Haldane phase and period doubled Néel phase for the integer spin chains. On the other hand, the transition from the Tomonaga-Luttinger liquid state into the ferrimagnetic state takes place for the half-odd-integer spin chains. In the ferrimagnetic phase, the spontaneous magnetization varies continuously with the modulation amplitude of the single site anisotropy. Eventually, the magnetization is locked to fractional values of the saturated magnetization. These fractional values satisfy the Oshikawa-Yamanaka-Affleck condition. The local spin profile is calculated to reveal the physical nature of each state. In contrast to the case of frustration induced ferrimagnetism, no incommensurate magnetic superstructure is found.
dc.description5 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0610660
dc.identifierhttp://arxiv.org/abs/cond-mat/0610660
dc.identifierJ. Phys. Soc. Jpn. 76 (2007) 024714
dc.identifierdoi:10.1143/JPSJ.76.024714
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/126707
dc.subjectStrongly Correlated Electrons
dc.subjectStatistical Mechanics
dc.titleFerrimagnetic and Long Period Antiferromagnetic Phases in High Spin Heisenberg Chains with D-Modulation
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