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강상관계 물질 연구단
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Spontaneous structural distortion of the metallic Shastry-Sutherland system DyB4 by quadrupole-spin-lattice coupling

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Title
Spontaneous structural distortion of the metallic Shastry-Sutherland system DyB4 by quadrupole-spin-lattice coupling
Author(s)
Hasung Sim; Lee, S; Kun-Pyo Hong; Jaehong Jeong; Zhang, JR; Kamiyama, T; Adroja, DT; Murray, CA; Thompson, SP; Iga, F; Ji, S; Khomskii, D; Je-Geun Park
Publication Date
2016-11
Journal
PHYSICAL REVIEW B, v.94, no.19, pp.195128 -
Publisher
AMER PHYSICAL SOC
Abstract
DyB4 has a two-dimensional Shastry-Sutherland (Sh-S) lattice with strong Ising character of the Dy ions. Despite the intrinsic frustrations, it undergoes two successive transitions: a magnetic ordering at T-N = 20K and a quadrupole ordering at T-Q = 12.5K. From high-resolution neutron and synchrotron x-ray powder diffraction studies, we have obtained full structural information on this material in all phases and demonstrate that structural modifications occurring at quadrupolar transition lead to the lifting of frustrations inherent in the Sh-S model. Our paper thus provides a complete experimental picture of how the intrinsic frustration of the Sh-S lattice can be lifted by the coupling to quadrupole moments. We show that two other factors, i.e., strong spin-orbit coupling and long-range Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in metallic DyB4, play an important role in this behavior. © 2016 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/3157
ISSN
2469-9950
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
2016-227.pdfDownload

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