關鍵字查詢 | 類別:期刊論文 | | 關鍵字:Low energy orbital excitations in strained LaCoO3 films

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序號 學年期 教師動態
1 108/1 物理系 杜昭宏 教授 期刊論文 發佈 Low energy orbital excitations in strained LaCoO3 films , [108-1] :Low energy orbital excitations in strained LaCoO3 films期刊論文Low energy orbital excitations in strained LaCoO3 filmsRu-Pan Wang; Jaap Geessinck; Hebatalla Elnaggar; Keisuke Tomiyasu; Jun Okamoto; Boyang Liu; Chao-Hung Du; Di-Jing Huang; Gertjan Koster,; Frank M. F. de GrootPhys. Rev. B 100(16), 165148We present 90 meV resolved Co 2p3d resonant inelastic x-ray scattering linear dichroism spectra of strained LaCoO3 films and a LaCoO3 single crystal. A polarization-dependent low-energy excitation is observed at ∼0.2eV on the tensile-strained LaCoO3/SrTiO3 film, while it is not observed in either bulk LaCoO3 or the compressive-strained LaCoO3/LaAlO 3 film. Guided by cluster calculations, we are able to distinguish the spin-state manifolds close to their transition point of Co3+ ions in LaCoO3 systems. Through a polarization analysis, we show that the spin state can easily flip from a low-spin 1A1g state in an octahedral symmetry to the high-spin 5B2g or 5Eg states with a small tetragonal
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