2005/03/04 by C. Ulrich, A. Gößling, A. Gössling +19
Materials Science · Medicine · Physics and Astronomy · #Crystal Structures and Properties #FOS: Physical sciences #Facial Trauma and Fracture Management #Ferroelectric and Piezoelectric Materials #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0503106
4 pages, 4 figures
arxiv created 2005/03/04 · openalex publication_date 2005/03/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Raman scattering is used to observe pronounced electronic excitations around 230 meV - well above the two-phonon range - in the Mott insulators LaTiO3 and YTiO3. Based on the temperature, polarization, and photon energy dependence, the modes are identified as orbital excitations. The observed profiles bear a striking resemblance to magnetic Raman modes in the insulating parent compounds of the superconducting cuprates, indicating an unanticipated universality of the electronic excitations in transition metal oxides.