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HALDANE ENERGY-GAP OF A DOPED LINEAR-CHAIN HEISENBERG-ANTIFERROMAGNET
LU, ZY; SU, ZB; YU, L; LU, ZY , ACAD SINICA,INST THEORET PHYS,POB 2735,BEIJING 100080,PEOPLES R CHINA.
1993
发表期刊PHYSICAL REVIEW B
ISSN0163-1829
卷号47期号:18页码:12276-12279
摘要Using the valence-bond-solid (VBS) approach and the Schwinger-boson mean-field approximation, we study the dependence of the Haldane gap of a spin-1 linear-chain Heisenberg antiferromagnet on impurity doping with different spins. The impurity spins affect the singlet pairing order parameter DELTA and the constraint factor lambda. As a result, the Haldane gap is reduced by a factor is similar to n(i)2/3, with n(i) as the impurity concentration, and eventually collapses at n(i) is similar to 1/xi with xi as the VBS correlation length. This theoretical prediction can be verified by neutron-scattering experiments.
部门归属INT CTR THEORET PHYS,I-34100 TRIESTE,ITALY
关键词Quantum Spin Chains Bond Ground-states Models Field
学科领域Physics
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收录类别SCI
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12039
专题理论物理所1978-2010年知识产出
通讯作者LU, ZY , ACAD SINICA,INST THEORET PHYS,POB 2735,BEIJING 100080,PEOPLES R CHINA.
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LU, ZY,SU, ZB,YU, L,et al. HALDANE ENERGY-GAP OF A DOPED LINEAR-CHAIN HEISENBERG-ANTIFERROMAGNET[J]. PHYSICAL REVIEW B,1993,47(18):12276-12279.
APA LU, ZY,SU, ZB,YU, L,&LU, ZY , ACAD SINICA,INST THEORET PHYS,POB 2735,BEIJING 100080,PEOPLES R CHINA..(1993).HALDANE ENERGY-GAP OF A DOPED LINEAR-CHAIN HEISENBERG-ANTIFERROMAGNET.PHYSICAL REVIEW B,47(18),12276-12279.
MLA LU, ZY,et al."HALDANE ENERGY-GAP OF A DOPED LINEAR-CHAIN HEISENBERG-ANTIFERROMAGNET".PHYSICAL REVIEW B 47.18(1993):12276-12279.
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