Abstract
We report the three-dimensional (3D) momentum-resolved soft x-ray photoemission spectroscopy of the Fermi liquid . The out-of-plane and in-plane cuts of the 3D electron- and hole-Fermi surfaces (FSs) are observed by energy- and angle-dependent photoemission measurements. The energy bands forming the electron FS suggest an dependence of the imaginary part of the self-energy and a “correlation kink” at an energy scale of 0.25 eV. In contrast, the bands which form nesting character hole FSs do not show kinks and match local-density approximation calculations. The results indicate a momentum-dependent mass renormalization, leading to electron-hole asymmetry in strongly correlated .
- Received 10 December 2008
DOI:https://doi.org/10.1103/PhysRevB.79.115122
©2009 American Physical Society