BROWSE

Related Scientist

Kim, Bumjoon's photo.

Kim, Bumjoon
원자제어 저차원 전자계 연구단
more info

ITEM VIEW & DOWNLOAD

Spin and charge excitations in the correlated multiband metal Ca3Ru2O7

Cited 0 time in webofscience Cited 0 time in scopus
8 Viewed 0 Downloaded
Title
Spin and charge excitations in the correlated multiband metal Ca3Ru2O7
Author(s)
Bertinshaw, J.; Krautloher, M.; Suzuki, H.; Takahashi, H.; Ivanov, A.; Yavas, H.; Kim, Bumjoon; Gretarsson, H.; Keimer, B.
Publication Date
2021-02
Journal
PHYSICAL REVIEW B, v.103, no.8
Publisher
AMER PHYSICAL SOC
Abstract
We use Ru L-3-edge resonant inelastic x-ray scattering to study the full range of excitations in Ca3Ru2O7 from meV-scale magnetic dynamics through to the eV-scale interband transitions. This bilayer 4d-electron correlated metal expresses a rich phase diagram, displaying long-range magnetic order below 56 K followed by a concomitant structural, magnetic, and electronic transition at 48 K. In the low-temperature phase, we observe a magnetic excitation with a bandwidth of similar to 30 meV and a gap of similar to 8 meV at the zone center, in excellent agreement with inelastic neutron scattering data. The dispersion can be modeled using a Heisenberg Hamiltonian for a bilayer S = 1 system with single-ion anisotropy terms. At a higher energy loss, dd-type excitations show heavy damping in the presence of itinerant electrons, giving rise to a fluorescencelike signal appearing between the t(2g) and e(g) bands. At the same time, we observe a resonance originating from localized t(2g) excitations, in analogy to the structurally related Mott insulator Ca2RuO4. But whereas Ca2RuO4 shows sharp separate spin-orbit excitations and Hund's-rule driven spin-state transitions, here we identify only a single broad asymmetric feature. These results indicate that local intraionic interactions underlie the correlated physics in Ca3Ru2O7, even as the excitations become strongly mixed in the presence of itinerant electrons.
URI
https://pr.ibs.re.kr/handle/8788114/9520
DOI
10.1103/PhysRevB.103.085108
ISSN
2469-9950
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse