期刊论文详细信息
Evidence of phonon-mediated coupling between charge transfer and ligand field excitons in Sr2CuO2Cl2 | |
Article | |
关键词: TEMPERATURE-DEPENDENCE; ELECTRONIC-STRUCTURE; EXCITATIONS; ABSORPTION; SPECTRA; | |
DOI : 10.1103/PhysRevB.63.235104 | |
来源: SCIE |
【 摘 要 】
We present a comparative experimental and theoretical investigation of the two-dimensional charge transfer gap in the strongly correlated material Sr2CuO2Cl2. We observe an Urbach behavior in the absorption profile over a surprisingly wide range of energies and temperatures. We present a model that accounts for phonon scattering to infinite order and that allows us to explain the data accurately by assuming coupling of the charge transfer gap exciton to lower-energy electronic excitations.
【 授权许可】
Free