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 IrTe2 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.
authors.affiliation: c_CCMR &Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.|Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 790-784, Korea.|Max Plank Institute for Chemical Physics in Solid, 01187 Dresden, Germany.
authors.forename: K-T
authors.initials: KT
authors.lastname: Ko
authors.affiliation: c_CCMR &Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.|Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 790-784, Korea.
authors.forename: H-H
authors.initials: HH
authors.lastname: Lee
authors.affiliation: c_CCMR &Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.|Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 790-784, Korea.
authors.forename: D-H
authors.initials: DH
authors.lastname: Kim
authors.affiliation: Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 790-784, Korea.|l_PEM &Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.
authors.forename: J-J
authors.initials: JJ
authors.lastname: Yang
authors.affiliation: l_PEM &Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.|Department of Physics and Astronomy, Rutgers Center for Emergent Materials, Rutgers University, Piscataway, New Jersey 08854, USA.
authors.forename: S-W
authors.initials: SW
authors.lastname: Cheong
authors.affiliation: Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.
authors.forename: M J
authors.initials: MJ
authors.lastname: Eom
authors.affiliation: Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.
authors.forename: J S
authors.initials: JS
authors.lastname: Kim
authors.affiliation: Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.
authors.forename: R
authors.initials: R
authors.lastname: Gammag
authors.affiliation: Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.
authors.forename: K-S
authors.initials: KS
authors.lastname: Kim
authors.affiliation: Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.|Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science, Pohang 790-784, Korea.
authors.forename: H-S
authors.initials: HS
authors.lastname: Kim
authors.affiliation: Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.|Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science, Pohang 790-784, Korea.
authors.forename: T-H
authors.initials: TH
authors.lastname: Kim
authors.affiliation: Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.|Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science, Pohang 790-784, Korea.
authors.forename: H-W
authors.initials: HW
authors.lastname: Yeom
authors.affiliation: Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 790-784, Korea.
authors.forename: T-Y
authors.initials: TY
authors.lastname: Koo
authors.affiliation: Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 790-784, Korea.|Center for Correlated Electron Systems, Institute for Basic Science (IBS) &Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
authors.forename: H-D
authors.initials: HD
authors.lastname: Kim
authors.affiliation: c_CCMR &Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.|Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 790-784, Korea.|Division of Advanced Materials Science, Pohang University of Science and Technology, Pohang 790-784, Korea.
authors.forename: J-H
authors.initials: JH
authors.lastname: Park