Spin-orbit-induced orbital excitations in Sr2RuO4 and Ca2RuO4: A resonant inelastic x-ray scattering study

Fatuzzo C. G.; Dantz M.; Fatale S.Olalde-Velasco P.Shaik N. E.Piazza B. DallaToth S.Pelliciari J.Fittipaldi R.Vecchione A.Kikugawa N.Brooks J. S.Ronnow H. M.Grioni M.Rueegg Ch.Schmitt T.Chang J.

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Spin-orbit-induced orbital excitations in Sr2RuO4 and Ca2RuO4: A resonant inelastic x-ray scattering study

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High-resolution resonant inelastic x-ray scattering (RIXS) at the oxygen K edge has been used to study the orbital excitations of Ca2RuO4 and Sr2RuO4. In combination with linear dichroism x-ray absorption spectroscopy, the ruthenium 4d-orbital occupation and excitations were probed through their hybridization with the oxygen p orbitals. These results are described within a minimal model, taking into account crystal field splitting and a spin-orbit coupling lambda(so) = 200 meV. The effects of spin-orbit interaction on the electronic structure and implications for the Mott and superconducting ground states of (Ca,Sr)(2)RuO4 are discussed.

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《Physical review, B. Condensed matter and materials physics》 |2015年第15期|共5页
作者
Fatuzzo C. G.; Dantz M.; Fatale S.Olalde-Velasco P.Shaik N. E.Piazza B. DallaToth S.Pelliciari J.Fittipaldi R.Vecchione A.Kikugawa N.Brooks J. S.Ronnow H. M.Grioni M.Rueegg Ch.Schmitt T.Chang J.;
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作者单位

Ecole Polytech Fed Lausanne, Inst Condensed Matter Phys, CH-1015 Lausanne, Switzerland;

Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland;

Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, SwitzerlandCNR SPIN, I-84084 Salerno, ItalyNatl Inst Mat Sci, Tsukuba, Ibaraki 3050047, JapanNat High Magnet Field Lab, Tallahassee, FL 32310 USA;

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Spin-orbit-induced orbital excitations in Sr2RuO4 and Ca2RuO4: A resonant inelastic x-ray scattering study

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