Coexistence of a nearly spin-singlet state and antiferromagnetic long-range order in quantum spin system Cu$_2$CdB$_2$O$_6$

Masashi Hase; Masanori Kohno; Hideaki Kitazawa; Osamu Suzuki; Kiyoshi Ozawa; Giyuu Kido; Motoharu Imai; Xiao Hu

doi:10.1103/PhysRevB.72.172412

Coexistence of a nearly spin-singlet state and antiferromagnetic long-range order in quantum spin system Cu$_2$CdB$_2$O$_6$

Strongly Correlated Electrons 2009-11-11 v1

Authors: Masashi Hase , Masanori Kohno , Hideaki Kitazawa , Osamu Suzuki , Kiyoshi Ozawa , Giyuu Kido , Motoharu Imai , Xiao Hu

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Abstract

A 1/2 magnetization plateau in magnetic fields above 23 T and antiferromagnetic (AF) long-range order (AFLRO) in low fields were found in Cu $_2$ CdB $_2$ O $_6$ . Experimental results agree with quantum Monte Carlo results for an expected spin system. There are two kinds of Cu sites [Cu(1) and Cu(2)], which are located adjacent to each other. Unexpectedly, spins on the Cu(1) and Cu(2) sites are in a nearly spin-singlet state and form AFLRO, respectively, although interactions between the Cu(1) and Cu(2) spins cannot be ignored. Cu $_2$ CdB $_2$ O $_6$ is the first material which shows such coexistence in an atomic scale.

Keywords

quantum spin system spin-singlet state antiferromagnetic order Cu$_2$CdB$_2$O$_6$

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@article{arxiv.cond-mat/0509094,
  title  = {Coexistence of a nearly spin-singlet state and antiferromagnetic long-range order in quantum spin system Cu$_2$CdB$_2$O$_6$},
  author = {Masashi Hase and Masanori Kohno and Hideaki Kitazawa and Osamu Suzuki and Kiyoshi Ozawa and Giyuu Kido and Motoharu Imai and Xiao Hu},
  journal= {arXiv preprint arXiv:cond-mat/0509094},
  year   = {2009}
}

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5 pages, 4 figures

Coexistence of a nearly spin-singlet state and antiferromagnetic long-range order in quantum spin system Cu$_2$CdB$_2$O$_6$

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