### Abstract

Critical properties of field-induced magnetic phases are investigated in the one-dimensional S = 1 Haldane system with planar anisotropy, using the finite-temperature density-matrix renormalization group method. We point out that the underlying physics of the properties differs significantly between cases of different field directions: The magnetic phase is characterized as the gapless Tomonaga-Luttinger regime in one case and as the gapful soliton regime in the other. In connection with the information obtained for the one-dimensional spin chain, possible implications for the field-induced magnetic long-range ordering are discussed.

Original language | English |
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Pages (from-to) | 107-112 |

Number of pages | 6 |

Journal | Progress of Theoretical Physics |

Issue number | 145 SUPPL. |

Publication status | Published - 2002 |

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### ASJC Scopus subject areas

- Physics and Astronomy(all)

### Cite this

*Progress of Theoretical Physics*, (145 SUPPL.), 107-112.

**Magnetic phases and long-range ordering of the Haldane system in high magnetic fields.** / Harada, Isao; Nishiyama, Yoshihiro.

Research output: Contribution to journal › Article

*Progress of Theoretical Physics*, no. 145 SUPPL., pp. 107-112.

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TY - JOUR

T1 - Magnetic phases and long-range ordering of the Haldane system in high magnetic fields

AU - Harada, Isao

AU - Nishiyama, Yoshihiro

PY - 2002

Y1 - 2002

N2 - Critical properties of field-induced magnetic phases are investigated in the one-dimensional S = 1 Haldane system with planar anisotropy, using the finite-temperature density-matrix renormalization group method. We point out that the underlying physics of the properties differs significantly between cases of different field directions: The magnetic phase is characterized as the gapless Tomonaga-Luttinger regime in one case and as the gapful soliton regime in the other. In connection with the information obtained for the one-dimensional spin chain, possible implications for the field-induced magnetic long-range ordering are discussed.

AB - Critical properties of field-induced magnetic phases are investigated in the one-dimensional S = 1 Haldane system with planar anisotropy, using the finite-temperature density-matrix renormalization group method. We point out that the underlying physics of the properties differs significantly between cases of different field directions: The magnetic phase is characterized as the gapless Tomonaga-Luttinger regime in one case and as the gapful soliton regime in the other. In connection with the information obtained for the one-dimensional spin chain, possible implications for the field-induced magnetic long-range ordering are discussed.

UR - http://www.scopus.com/inward/record.url?scp=0036991014&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036991014&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0036991014

SP - 107

EP - 112

JO - Progress of Theoretical Physics

JF - Progress of Theoretical Physics

SN - 0033-068X

IS - 145 SUPPL.

ER -