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원자제어 저차원 전자계 연구단
원자제어 저차원 전자계 연구단
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Charge-ordering cascade with spin–orbit Mott dimer states in metallic iridium ditelluride

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Title
Charge-ordering cascade with spin–orbit Mott dimer states in metallic iridium ditelluride
Author(s)
K.-T. Ko; H.-H. Lee; D.-H. Kim; J.-J. Yang; S.-W. Cheong; M.J. Eom; J.S. Kim; R. Gammag; K.-S. Kim; Hyosung Kim; Taehwan Kim; Hwanwoong Yeom; T.-Y. Koo; Hyeong-Do Kim; J.-H. Park
Publication Date
2015-06
Journal
NATURE COMMUNICATIONS, v.6, no., pp.7342 -
Publisher
NATURE PUBLISHING GROUP
Abstract
Spin.orbit coupling results in technologically-crucial phenomena underlying magnetic devices like magnetic memories and energy-efficient motors. In heavy element materials, the strength of spin.orbit coupling becomes large to affect the overall electronic nature and induces novel states such as topological insulators and spin.orbit-integrated Mott states. Here we report an unprecedented charge-ordering cascade in IrTe2 without the loss of metallicity, which involves localized spin.orbit Mott states with diamagnetic Ir4þ.Ir4þ dimers. The cascade in cooling, uncompensated in heating, consists of first order-type consecutive transitions from a pure Ir3þ phase to Ir3þ.Ir4þ charge-ordered phases, which originate from Ir 5d to Te 5p charge transfer involving anionic polymeric bond breaking. Considering that the system exhibits superconductivity with suppression of the charge order by doping, analogously to cuprates, these results provide a new electronic paradigm of localized charge-ordered states interacting with itinerant electrons through large spin.orbit coupling.
URI
http://pr.ibs.re.kr/handle/8788114/1661
ISSN
2041-1723
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
Files in This Item:
20150610-IrTe2_NatureComm.pdfDownload

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