Ground-state phase diagram of S = 2 quantum spin chain with the XXZ and on-site anisotropies

Kiyomi Okamoto, Takashi Tonegawa, Hiroki Nakano, Tôru Sakai, Kiyohide Nomura, Makoto Kaburagi

研究成果: ジャーナルへの寄稿学術誌査読

7 被引用数 (Scopus)

抄録

By use of mainly numerical methods, we investigate the ground-state phase diagram of an S = 2 quantum spin chain with the XXZ and on-site anisotropies described by H = Σj(SjxS j+1x + SyjSy j+1 + ΔSzjSzj+1 + D Σj(Szj)2, where Δ denotes the XXZ anisotropy parameter of the nearest-neighbor interactions and D the on-site anisotropy parameter. In the phase diagram with Δ > 0 and D > 0 there appear the XY phase, the Haldane/large-D (LD) phase, the intermediate-D (ID) phase, and the Néel phase. Among them the ID phase was proposed by Oshikawa in 1992 and has been considered to be absent since the DMRG studies in the latter half of 1990's. And also, the Haldane state and the LD state belong to the same phase, which should be named Haldane/LD phase.

本文言語英語
論文番号012014
ジャーナルJournal of Physics: Conference Series
302
1
DOI
出版ステータス出版済み - 2011

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)

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