Speaker
Kun Jiang
Description
We present a systematic study of the electronic structure of La3Ni2O7, focusing on the roles of the \gamma band, Jahn–Teller (JT) distortion, and apical oxygen vacancies. We show that the \gamma band is highly sensitive to details of the numerical approximations, and can therefore strongly influence the low-energy electronic states. For thin films, epitaxial strain predominantly enhances the JT splitting between d_{z^2} and d_{x^2-y^2} orbitals, thereby reshaping the Fermi surface, while the interlayer coupling remains comparatively unchanged. In contrast, apical oxygen deficiency significantly reconstructs the band structure by suppressing interlayer hybridization.
Author
Kun Jiang
Co-authors
Prof.
Fuchun Zhang
Dr
Yuxin Wang
Dr
Zhan Wang