EXCITED-STATES AND THE THERMODYNAMICS OF A FULLY FRUSTRATED QUANTUM SPIN CHAIN

被引：61

作者：

KUBO, K

机构：

[1] Institute of Physics, University of Tsukuba

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.48.10552

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A one-dimensional fully frustrated spin system called a DELTA chain is considered and its excited states and the specific heat are investigated. As in the Heisenberg antiferromagnet on the kagome lattice, the classical ground state of the system has infinite continuous degeneracies. Numerical studies of finite systems show that the low-lying excited states have an almost dispersionless spectrum near a small energy gap. As a result the specific heat exhibits a two-peak structure, one of which arises from these low-lying excited states.

引用

收藏

页码：10552 / 10555

页数：4

相关论文

共 32 条

[11] FROM THE ANTIFERROMAGNETIC REGIME TO THE SPIN-GLASS STATE IN THE FRUSTRATED SPINEL SYSTEM ZNCR2XGA2-2XO4 [J].

FIORANI, D ;

DORMANN, JL ;

THOLENCE, JL ;

SOUBEYROUX, JL .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1985, 18 (15) :3053-3063

[12] NUCLEAR FERROMAGNETISM OF TWO-DIMENSIONAL HE-3 [J].

FRANCO, H ;

RAPP, RE ;

GODFRIN, H .

PHYSICAL REVIEW LETTERS, 1986, 57 (09) :1161-1164

[13]

FUKAMACHI K, UNPUB

[14] SPIN FREEZING IN THE GEOMETRICALLY FRUSTRATED PYROCHLORE ANTIFERROMAGNET TB2MO2O7 [J].

GAULIN, BD ;

REIMERS, JN ;

MASON, TE ;

GREEDAN, JE ;

TUN, Z .

PHYSICAL REVIEW LETTERS, 1992, 69 (22) :3244-3247

[15] HEAT-CAPACITY OF MULTILAYERS OF HE-3 ADSORBED ON GRAPHITE AT LOW MILLIKELVIN TEMPERATURES [J].

GREYWALL, DS .

PHYSICAL REVIEW B, 1990, 41 (04) :1842-1862

[16] HEAT-CAPACITY OF HE-3 ADSORBED ON GRAPHITE AT MILLIKELVIN TEMPERATURES AND NEAR 3RD-LAYER PROMOTION [J].

GREYWALL, DS ;

BUSCH, PA .

PHYSICAL REVIEW LETTERS, 1989, 62 (16) :1868-1871

[17] EXACT SOLUTION OF THE GROUND-STATE FOR UNIFORMLY DISTRIBUTED RVB IN ONE-DIMENSIONAL SPIN-1/2 HEISENBERG SYSTEMS WITH FRUSTRATION [J].

HAMADA, T ;

KANE, J ;

NAKAGAWA, S ;

NATSUME, Y .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1988, 57 (06) :1891-1894

[18] THERMODYNAMIC PROPERTIES OF THE ONE-DIMENSIONAL SPIN-1/2 HEISENBERG-ANTIFERROMAGNET WITH COMPETING INTERACTIONS [J].

HARADA, I ;

KIMURA, T ;

TONEGAWA, T .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1988, 57 (08) :2779-2790

[19] POSSIBLE NEEL ORDERINGS OF THE KAGOME ANTIFERROMAGNET [J].

HARRIS, AB ;

KALLIN, C ;

BERLINSKY, AJ .

PHYSICAL REVIEW B, 1992, 45 (06) :2899-2919

[20] PROJECTED FERMION GROUND-STATE ANSATZ FOR THE S = 1/2 KAGOME LATTICE ANTIFERROMAGNET [J].

HSU, TC ;

SCHOFIELD, AJ .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1991, 3 (41) :8067-8078

← 1 2 3 4 →