Charge-ordering cascade with spin-orbit Mott dimer states in metallic iridium ditelluride

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; H. S. Kim; T. H. Kim; H. W. Yeom; T. Y. Koo; H. D. Kim; J. H. Park

doi:10.1038/ncomms8342

Charge-ordering cascade with spin-orbit Mott dimer states in metallic iridium ditelluride

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, H. S. Kim, T. H. Kim, H. W. Yeom, T. Y. Koo, H. D. Kim, J. H. Park

Department of Physics

Research output: Contribution to journal › Article › peer-review

40 Citations (Scopus)

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 IrTe 2 without the loss of metallicity, which involves localized spin-orbit Mott states with diamagnetic Ir 4+ -Ir 4+ dimers. The cascade in cooling, uncompensated in heating, consists of first order-type consecutive transitions from a pure Ir 3+ phase to Ir 3+ -Ir 4+ 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.

Original language	English
Article number	7342
Journal	Nature communications
Volume	6
DOIs	https://doi.org/10.1038/ncomms8342
Publication status	Published - 2015 Jun 10

Bibliographical note

Funding Information:
We appreciate the kind support of S.-Y. Park for the XRD measurements. This work was supported by the National Creative Initiative (2009-0081576) and Max Plank POSTECH/ KOREA Research Initiative (2011-0031558) programme through NRF by MSIP of Korea. J.S.K. is also supported by Basic Pesearch Program (2012-013838) through NRF by MSIP of Korea. K.-S.K. is also supported by Basic Research Programs (2012R1A1B3000550 and 2011-0030785) through NRF by MSIP of Korea and by TJ Park Science Fellowship. H.-S.K., T.-H.K., and H.-W.Y. are supported by Institute for Basic Science (IBS) in Korea. The work at Rutgers University was supported by the NSF (NSF-DMREF-1233349) of US. The Pohang Accelerator Laboratory is supported by POSTECH and MSIP of Korea.

Publisher Copyright:
© 2015 Macmillan Publishers Limited. All rights reserved.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Biochemistry, Genetics and Molecular Biology(all)
General
Physics and Astronomy(all)

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title = "Charge-ordering cascade with spin-orbit Mott dimer states in metallic iridium ditelluride",

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 IrTe 2 without the loss of metallicity, which involves localized spin-orbit Mott states with diamagnetic Ir 4+ -Ir 4+ dimers. The cascade in cooling, uncompensated in heating, consists of first order-type consecutive transitions from a pure Ir 3+ phase to Ir 3+ -Ir 4+ 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.",

author = "Ko, {K. T.} and Lee, {H. H.} and Kim, {D. H.} and Yang, {J. J.} and Cheong, {S. W.} and Eom, {M. J.} and Kim, {J. S.} and R. Gammag and Kim, {K. S.} and Kim, {H. S.} and Kim, {T. H.} and Yeom, {H. W.} and Koo, {T. Y.} and Kim, {H. D.} and Park, {J. H.}",

note = "Funding Information: We appreciate the kind support of S.-Y. Park for the XRD measurements. This work was supported by the National Creative Initiative (2009-0081576) and Max Plank POSTECH/ KOREA Research Initiative (2011-0031558) programme through NRF by MSIP of Korea. J.S.K. is also supported by Basic Pesearch Program (2012-013838) through NRF by MSIP of Korea. K.-S.K. is also supported by Basic Research Programs (2012R1A1B3000550 and 2011-0030785) through NRF by MSIP of Korea and by TJ Park Science Fellowship. H.-S.K., T.-H.K., and H.-W.Y. are supported by Institute for Basic Science (IBS) in Korea. The work at Rutgers University was supported by the NSF (NSF-DMREF-1233349) of US. The Pohang Accelerator Laboratory is supported by POSTECH and MSIP of Korea. Publisher Copyright: {\textcopyright} 2015 Macmillan Publishers Limited. All rights reserved.",

year = "2015",

month = jun,

day = "10",

doi = "10.1038/ncomms8342",

language = "English",

volume = "6",

journal = "Nature communications",

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T1 - Charge-ordering cascade with spin-orbit Mott dimer states in metallic iridium ditelluride

AU - Ko, K. T.

AU - Lee, H. H.

AU - Kim, D. H.

AU - Yang, J. J.

AU - Cheong, S. W.

AU - Eom, M. J.

AU - Kim, J. S.

AU - Gammag, R.

AU - Kim, K. S.

AU - Kim, H. S.

AU - Kim, T. H.

AU - Yeom, H. W.

AU - Koo, T. Y.

AU - Kim, H. D.

AU - Park, J. H.

N1 - Funding Information: We appreciate the kind support of S.-Y. Park for the XRD measurements. This work was supported by the National Creative Initiative (2009-0081576) and Max Plank POSTECH/ KOREA Research Initiative (2011-0031558) programme through NRF by MSIP of Korea. J.S.K. is also supported by Basic Pesearch Program (2012-013838) through NRF by MSIP of Korea. K.-S.K. is also supported by Basic Research Programs (2012R1A1B3000550 and 2011-0030785) through NRF by MSIP of Korea and by TJ Park Science Fellowship. H.-S.K., T.-H.K., and H.-W.Y. are supported by Institute for Basic Science (IBS) in Korea. The work at Rutgers University was supported by the NSF (NSF-DMREF-1233349) of US. The Pohang Accelerator Laboratory is supported by POSTECH and MSIP of Korea. Publisher Copyright: © 2015 Macmillan Publishers Limited. All rights reserved.

PY - 2015/6/10

Y1 - 2015/6/10

N2 - 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 IrTe 2 without the loss of metallicity, which involves localized spin-orbit Mott states with diamagnetic Ir 4+ -Ir 4+ dimers. The cascade in cooling, uncompensated in heating, consists of first order-type consecutive transitions from a pure Ir 3+ phase to Ir 3+ -Ir 4+ 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.

AB - 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 IrTe 2 without the loss of metallicity, which involves localized spin-orbit Mott states with diamagnetic Ir 4+ -Ir 4+ dimers. The cascade in cooling, uncompensated in heating, consists of first order-type consecutive transitions from a pure Ir 3+ phase to Ir 3+ -Ir 4+ 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.

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ER -

Charge-ordering cascade with spin-orbit Mott dimer states in metallic iridium ditelluride

Abstract

Bibliographical note

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