CeFePO：f-d 杂化与超导猝灭。

CeFePO: f-d hybridization and quenching of superconductivity.

机构信息

Institut für Festkörperphysik, Technische Universität Dresden, D-01062 Dresden, Germany.

出版信息

Phys Rev Lett. 2010 Mar 5;104(9):096402. doi: 10.1103/PhysRevLett.104.096402.

DOI:10.1103/PhysRevLett.104.096402

PMID:20366999

Abstract

As a homologue to the new, Fe-based type of high-temperature superconductors, the electronic structure of the heavy-fermion compound CeFePO was studied by means of angle-resolved resonant photoemission. It was experimentally found-and later on confirmed by local-density approximation (LDA) as well as dynamical mean-field theory (DMFT) calculations-that the Ce 4f states hybridize to the Fe 3d states of d{3z{2}-r{2}} symmetry near the Fermi level that discloses their participation in the occurring electron-correlation phenomena and provides insight into mechanism of superconductivity in oxopnictides.

摘要

通过角分辨共振光发射研究了新型 Fe 基高温超导体的同系物——重费米子化合物 CeFePO 的电子结构。实验发现（后来通过局域密度近似（LDA）和动态平均场理论（DMFT）计算也得到证实），在费米能级附近，Ce 4f 态与具有 d{3z{2}-r{2}}对称性的 Fe 3d 态发生杂化，揭示了它们参与发生的电子相关现象，并深入了解了 oxopnictides 中超导性的机制。