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	Magnetic properties of j-j-j ' quantum heisenberg chains with spin s=1/2, 1,3/2 and 2 in a magnetic
	Gu, B; Su, G; Gao, S
刊名	Journal of physics-condensed matter
	2005-09-28
卷号	17期号:38页码:6081-6094
ISSN号	0953-8984
DOI	10.1088/0953-8984/17/38/012
通讯作者	Su, g()
英文摘要	By means of the density matrix renormalization group (dmrg) method, the magnetic properties of the j-j-j' quantum heisenberg chains with spin s = 1/2, 1, 3/2 and 2 in the ground states are investigated in the presence of a magnetic field. two different cases are considered. (a) when j is antiferromagnetic and j' is ferromagnetic (i.e. the af-af-f chain), the system is a ferrimagnet. the plateaus of the magnetization are observed. it is found that the width of the plateaus decreases with increasing ferromagnetic coupling, and disappears when j'/j passes a critical value. the saturated field is observed to be independent of the ferromagnetic coupling. (b) when j is ferromagnetic and t is antiferromagnetic (i.e. the f-f-af chain), the system becomes an antiferromagnet. the plateaus of the magnetization are also seen. the width of the plateaus decreases with decreasing antiferromagnetic coupling, and disappears when j'/j passes a critical value. though the ground state properties are quite different, the magnetization plateaus in both cases tend to disappear when the ferromagnetic coupling becomes more dominant. besides, no fundamental difference between the systems with spin half-integer and integer has been found.
WOS关键词	ANTIFERROMAGNETIC CHAIN ; RENORMALIZATION-GROUPS ; CRYSTAL-STRUCTURE ; PHASE-TRANSITION ; HALDANE-GAP ; XXZ CHAINS ; BEHAVIOR ; PLATEAUS ; DYNAMICS ; LADDERS
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000232576500013
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2376987
专题	中国科学院大学
通讯作者	Su, G
作者单位	1.Chinese Acad Sci, Grad Univ, Coll Phys Sci, Beijing 100049, Peoples R China 2.Peking Univ, State Key Lab Rare Earth mat Chem & Applicat, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Gu, B,Su, G,Gao, S. Magnetic properties of j-j-j ' quantum heisenberg chains with spin s=1/2, 1,3/2 and 2 in a magnetic[J]. Journal of physics-condensed matter,2005,17(38):6081-6094.
APA	Gu, B,Su, G,&Gao, S.(2005).Magnetic properties of j-j-j ' quantum heisenberg chains with spin s=1/2, 1,3/2 and 2 in a magnetic.Journal of physics-condensed matter,17(38),6081-6094.
MLA	Gu, B,et al."Magnetic properties of j-j-j ' quantum heisenberg chains with spin s=1/2, 1,3/2 and 2 in a magnetic".Journal of physics-condensed matter 17.38(2005):6081-6094.

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