X-ray photoemission study of CeTIn5 (T = Co, Rh, Ir)

作者：Treske U^*; Khoshkhoo M S; Roth F; Knupfer M; Bauer E D; Sarrao J L; Buechner B; Koitzsch A

来源：Journal of Physics: Condensed Matter , 2014, 26(20): 205601.

DOI：10.1088/0953-8984/26/20/205601

• x-ray photoemission spectroscopy
• heavy fermion superconductors
• Anderson impurity model
• strongly correlated electrons

We investigated CeTIn5 (T = Co, Rh, Ir) using temperature- and angle-dependent x-ray photoemission spectroscopy. The Ce 3d core level has a very similar shape for all three materials and is indicative of weak f-hybridization. The spectra were analyzed using a simplified version of the Anderson impurity model, which yields a Ce 4f occupancy that is larger than 0.9. The temperature dependence shows a continuous, irreversible and exclusive broadening of the Ce 3d peaks, due to oxidation of Ce at the surface.

• 出版日期2014-5-21
• 单位Los Alamos