Random spin-1 quantum chains

被引：39

作者：

Boechat, B ^{[1
]}

Saguia, A ^{[1
]}

Continentino, MA ^{[1
]}

机构：

[1] FLORIDA STATE UNIV,NATL HIGH MAGNET FIELD LAB,TALLAHASSEE,FL 32306

来源：

SOLID STATE COMMUNICATIONS | 1996年 / 98卷 / 05期

关键词：

disordered systems; phase transitions; thermodynamic properties;

D O I：

10.1016/0038-1098(96)00082-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study disordered spin-1 quantum chains with random exchange and biquadratic interactions using a real space renormalization group approach. We find that the dimerized phase of the pure biquadratic model is unstable and gives rise to a random singlet phase in the presence of weak disorder. In the Haldane region of the phase diagram we obtain a quite different behavior.

引用

页码：411 / 416

页数：6

共 14 条

[1] THE HALDANE-GAP IN ANTIFERROMAGNETIC HEISENBERG-CHAINS
AFFLECK, I
[J]. REVIEWS IN MATHEMATICAL PHYSICS, 1994, 6 (5A) : 887 - 899
[2] SPIN-S QUANTUM CHAINS AND TEMPERLEY-LIEB ALGEBRAS
BATCHELOR, MT
BARBER, MN
[J]. JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1990, 23 (01): : L15 - L21
[3] BATCHELOR MT, 1989, PHYS REV B, V40, P4621
[4] Clark W. G., 1981, Physics in One Dimension. Proceedings of an International Conference, P289
[5] CONTINENTINO MA, IN PRESS PHILOS MAGA
[6] LOW-TEMPERATURE PROPERTIES OF THE RANDOM HEISENBERG ANTI-FERROMAGNETIC CHAIN
DASGUPTA, C
MA, S
[J]. PHYSICAL REVIEW B, 1980, 22 (03): : 1305 - 1319
[7] MAGNETIC AND CHARGE DYNAMICS IN A DOPED ONE-DIMENSIONAL TRANSITION-METAL OXIDE
DITUSA, JF
CHEONG, SW
PARK, JH
AEPPLI, G
BROHOLM, C
CHEN, CT
[J]. PHYSICAL REVIEW LETTERS, 1994, 73 (13) : 1857 - 1860
[8] TITANIUM-III WARWICKITES - A FAMILY OF ONE-DIMENSIONAL DISORDERED MAGNETIC SYSTEMS
FERNANDES, JC
GUIMARAES, RB
CONTINENTINO, MA
BORGES, HA
VALARELLI, JV
LACERDA, A
[J]. PHYSICAL REVIEW B, 1994, 50 (22): : 16754 - 16757
[9] RANDOM ANTIFERROMAGNETIC QUANTUM SPIN CHAINS
FISHER, DS
[J]. PHYSICAL REVIEW B, 1994, 50 (06): : 3799 - 3821
[10] CRITICAL-BEHAVIOR OF RANDOM TRANSVERSE-FIELD ISING SPIN CHAINS
FISHER, DS
[J]. PHYSICAL REVIEW B, 1995, 51 (10): : 6411 - 6461

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