Electronic and magnetic excitations in the "half-stuffed" Cu--O planes of Ba$_2$Cu$_3$O$_4$Cl$_2$ measured by resonant inelastic x-ray scattering

S. Fatale; C. G. Fatuzzo; P. Babkevich; N. E. Shaik; J. Pelliciari; X. Lu; D. E. McNally; T. Schmitt; A. Kikkawa; Y. Taguchi; Y. Tokura; B. Normand; H. M. Rønnow; M. Grioni

doi:10.1103/PhysRevB.96.115149

paper

Electronic and magnetic excitations in the "half-stuffed" Cu--O planes of Ba $_{2}$ Cu $_{3}$ O $_{4}$ Cl $_{2}$ measured by resonant inelastic x-ray scattering

arXiv:1709.03427 · doi:10.1103/PhysRevB.96.115149

Abstract

We use resonant inelastic x-ray scattering (RIXS) at the Cu L $_{3}$ edge to measure the charge and spin excitations in the "half-stuffed" Cu--O planes of the cuprate antiferromagnet Ba $_{2}$ Cu $_{3}$ O $_{4}$ Cl $_{2}$ . The RIXS line shape reveals distinct contributions to the $dd$ excitations from the two structurally inequivalent Cu sites, which have different out-of-plane coordinations. The low-energy response exhibits magnetic excitations. We find a spin-wave branch whose dispersion follows the symmetry of a CuO $_{2}$ sublattice, similar to the case of the "fully-stuffed" planes of tetragonal CuO (T-CuO). Its bandwidth is closer to that of a typical cuprate material, such as Sr $_{2}$ CuO $_{2}$ Cl $_{2}$ , than it is to that of T-CuO. We interpret this result as arising from the absence of the effective four-spin inter-sublattice interactions that act to reduce the bandwidth in T-CuO.

10 pages, 8 figures

Electronic and magnetic excitations in the "half-stuffed" Cu--O planes of Ba $_{2}$ Cu $_{3}$ O $_{4}$ Cl $_{2}$ measured by resonant inelastic x-ray scattering

Abstract

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Electronic and magnetic excitations in the "half-stuffed" Cu--O planes of Ba2​Cu3​O4​Cl2​ measured by resonant inelastic x-ray scattering

Abstract

References in corpus (3)

Cited by in corpus (2)

Electronic and magnetic excitations in the "half-stuffed" Cu--O planes of Ba $_{2}$ Cu $_{3}$ O $_{4}$ Cl $_{2}$ measured by resonant inelastic x-ray scattering