Probing inter- and intrachain Zhang-Rice excitons in Li2CuO2 and determining their binding energy

Monney, Claude; Bisogni, Valentina; Zhou, Ke-Jin; Kraus, Roberto; Strocov, Vladimir N.; Behr, Günter; Drechsler, Stefan-Ludwig; Rosner, Helge; Johnston, Steve; Geck, Jochen; Schmitt, Thorsten

doi:10.1103/PhysRevB.94.165118

Title: Probing inter- and intrachain Zhang-Rice excitons in ${Li}_{2} {CuO}_{2}$ and determining their binding energy

Journal Article · Mon Oct 10 00:00:00 EDT 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.94.165118· OSTI ID:1341697

Monney, Claude ^[1]; Bisogni, Valentina ^[2]; Zhou, Ke-Jin ^[3]; Kraus, Roberto ^[4]; Strocov, Vladimir N. ^[5]; Behr, Günter ^[4]; Drechsler, Stefan-Ludwig ^[4]; Rosner, Helge ^[6]; Johnston, Steve ^[7]; Geck, Jochen ^[8]; Schmitt, Thorsten ^[9]

Paul Scherrer Inst. (PSI), Villigen (Switzerland). Research Dept. Synchrotron Radiation and Nanotechnology; Univ. of Zurich (Switzerland). Inst. of Physics
Paul Scherrer Inst. (PSI), Villigen (Switzerland). Research Dept. Synchrotron Radiation and Nanotechnology; Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II); Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany)
Paul Scherrer Inst. (PSI), Villigen (Switzerland). Research Dept. Synchrotron Radiation and Nanotechnology; Science and Technology Facilities Council (STFC), Harwell Campus, Oxford (United Kingdom). Diamond Light Source, Ltd.
Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany)
Paul Scherrer Inst. (PSI), Villigen (Switzerland). Research Dept. Synchrotron Radiation and Nanotechnology
Max-Planck Inst. for Chemical Physics of Solids, Dresden (Germany)
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Univ. of Tennessee, Knoxville, TN (United States). Joint Inst. for Advanced Materials
Paris Lodron Univ. Salzburg, Salzburg (Austria)
Paul Scherrer Inst. (PSI), Villigen (Switzerland). Research Dept. Synchrotron Radiation and Nanotechnologyv

Cuprate materials, such as those hosting high-temperature superconductivity, represent a famous class of materials where the correlations between the strongly entangled charges and spins produce complex phase diagrams. Several years ago, the Zhang-Rice singlet was proposed as a natural quasiparticle in hole-doped cuprates. The occurrence and binding energy of this quasiparticle, consisting of a pair of bound holes with antiparallel spins on the same CuO₄ plaquette, depends on the local electronic interactions, which are fundamental quantities for understanding the physics of the cuprates. Here, we employ state-of-the-art resonant inelastic x-ray scattering (RIXS) to probe the correlated physics of the CuO₄ plaquettes in the quasi-one-dimensional chain cuprate Li₂CuO₂. By tuning the incoming photon energy to the O K edge, we populate bound states related to the Zhang-Rice quasiparticles in the RIXS process. Both intra- and interchain Zhang-Rice singlets are observed and their occurrence is shown to depend on the nearest-neighbor spin-spin correlations, which are readily probed in this experiment. Finally, we also extract the binding energy of the Zhang-Rice singlet and identify the Zhang-Rice triplet excitation in the RIXS spectra.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC00112704; PZ00P2_154867; GE 1647/3-1; 200021L_141325

OSTI ID:: 1341697

Report Number(s):: BNL-113444-2017-JA; PRBMDO; TRN: US1701544

Journal Information:: Physical Review B, Vol. 94, Issue 16; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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Signatures of a magnetic field-induced unconventional nematic liquid in the frustrated and anisotropic spin-chain cuprate LiCuSbO4 Grafe, H. -J.; Nishimoto, S.; Iakovleva, M. Scientific Reports, Vol. 7, Issue 1 https://doi.org/10.1038/s41598-017-06525-0	journal	July 2017
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Title: Probing inter- and intrachain Zhang-Rice excitons in ${Li}_{2} {CuO}_{2}$ and determining their binding energy