Momentum-resolved charge excitations in high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si5.gif" overflow="scroll"><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:math> cuprates studied by resonant inelastic X-ray scattering

Ishii, Kenji; Hoesch, Moritz; Inami, Toshiya; Kuzushita, Kaori; Ohwada, Kenji; Tsubota, Masami; Murakami, Youichi; Мizuki, J.; Endoh, Y.; Tsutsui, Kenji; Tohyama, Takami; Maekawa, Sadamichi; Yamada, K.; Masui, T.; Tajima, S.; Kawashima, Hirokazu; Akimitsu, Jun

doi:10.1016/j.jpcs.2008.06.041

Cited by 3 publications

(5 citation statements)

References 30 publications

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“…On the other hand, the spectral weight increases almost at the same energy with doping at high |q || | and high energy, for example, h > 0.2 for q || = (h,0) and above 1 eV. The latter has been confirmed by the K-edge RIXS [22,25]. This doping evolution is reproduced in the theoretical calculation of the dynamical charge correlation function, N(q,ω) [See Supplementary Fig.…”

Section: Resultsmentioning

confidence: 53%

High-energy spin and charge excitations in electron-doped copper oxide superconductors

et al. 2014

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The evolution of electronic (spin and charge) excitations upon carrier doping is an extremely important issue in superconducting layered cuprates and the knowledge of its asymmetry between electron-and hole-dopings is still fragmentary. Here we combine X-ray and neutron inelastic scattering measurements to track the doping dependence of both spin and charge excitations in electron-doped materials. Copper L 3 resonant inelastic X-ray scattering spectra show that magnetic excitations shift to higher energy upon doping. Their dispersion becomes steeper near the magnetic zone centre and they deeply mix with charge excitations, indicating that electrons acquire a highly itinerant character in the doped metallic state. Moreover, above the magnetic excitations, an additional dispersing feature is observed near the G-point, and we ascribe it to particle-hole charge excitations. These properties are in stark contrast with the more localized spin excitations (paramagnons) recently observed in hole-doped compounds even at high doping levels.

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Section: Resultsmentioning

confidence: 53%

High-energy spin and charge excitations in electron-doped copper oxide superconductors

et al. 2014

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“…6 which is consistent with the case of La 2Àx Sr x CuO 4 . A small dispersion was also observed in Ca 1:8 Na 0:2 CuO 2 Br 2 , 85) which is shown in Fig. 8(b).…”

Section: Cupratesmentioning

confidence: 61%

“…They measured the Mott gap excitation in Ca 2 CuO 2 Cl 2 , which is a parent material of high-T c superconducting cuprates, and found that the energy of the Mott gap excitation is lowest at the zone center of the CuO 2 plane and the magnitude of the dispersion along the ½; direction is larger than that along the ½; 0 direction. Following this work, other parent compounds were studied, including La 2 CuO 4 , 81-84) Nd 2 CuO 4 , 85,86) and YBa 2 Cu 3 O 6 . 85) In Fig.…”

Section: Cupratesmentioning

confidence: 99%

“…Following this work, other parent compounds were studied, including La 2 CuO 4 , 81-84) Nd 2 CuO 4 , 85,86) and YBa 2 Cu 3 O 6 . 85) In Fig. 6, we show the momentum dependence of RIXS spectra in the three parent compounds, La 2 CuO 4 , YBa 2 -Cu 3 O 6 , and Nd 2 CuO 4 , where the momentum is reduced to the first Brillouin zone of the CuO 2 plane.…”

Section: Cupratesmentioning

confidence: 99%

“…In particular, the intraband excitation is enhanced resonantly when the corehole is created at a site with a doped electron. In their subsequent study, 85) the doping dependence of Nd 2Àx -Ce x CuO 4 was measured and is shown in Fig. 10(b).…”

Section: Cupratesmentioning

confidence: 99%

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Inelastic X-ray Scattering Studies of Electronic Excitations

2013

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Inelastic x-ray scattering (IXS) has developed into one of the most powerful momentum-resolved spectroscopies. Especially in the last decade, it has achieved significant progress utilizing brilliant x-rays from third-generation synchrotron radiation facilities. Simultaneously, theoretical efforts have been made to predict or interpret the experimental spectra. One of the scientific fields studied intensively by IXS is strongly correlated electron systems, where the interplay of charge, spin, and orbital degrees of freedom determines their physical properties. IXS can provide a new insight into the electron dynamics of the systems through the observation of charge, spin, and orbital excitations. Focusing on the momentum-resolved electronic excitations in strongly correlated electron systems, we review IXS studies and the present capabilities of IXS for the study of the dynamics of materials. With nonresonant inelastic x-ray scattering (NIXS), one can directly obtain dynamical charge correlation and we discuss its complementary aspects with inelastic neutron scattering. NIXS also has a unique capability of measuring higher multipole transitions, which are usually forbidden in conventional optical absorption. Resonant inelastic x-ray scattering (RIXS) is now established as a valuable tool for measuring charge, spin, and orbital excitations in a momentum-resolved manner. We describe RIXS works on cuprates in detail and show what kind of electronic excitations have been observed. We also discuss RIXS studies on other transition-metal compounds. Finally, we conclude with an outlook on IXS using next-generation x-ray sources.

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Resonant Inelastic X-Ray Scattering in Strongly Correlated Copper Oxides

Ishii

2016

Resonant X-Ray Scattering in Correlated Systems

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Momentum-resolved charge excitations in high-Tc cuprates studied by resonant inelastic X-ray scattering

Cited by 3 publications

References 30 publications

High-energy spin and charge excitations in electron-doped copper oxide superconductors

High-energy spin and charge excitations in electron-doped copper oxide superconductors

Inelastic X-ray Scattering Studies of Electronic Excitations

Resonant Inelastic X-Ray Scattering in Strongly Correlated Copper Oxides

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