中国物理B ›› 2009, Vol. 18 ›› Issue (7): 2734-2738.doi: 10.1088/1674-1056/18/7/018
王宝义1, 魏龙1, 奎热西1, 钱海杰1, 刘应书2, 张辉3
Zhang Hui(张辉)a)b)†, Liu Ying-Shu(刘应书)a), Wang Bao-Yi(王宝义)b), Wei Long(魏龙)b), Kui Re-Xi(奎热西)b), and Qian Hai-Jie(钱海杰)b)
摘要: This paper reports how pyrite films were prepared by thermal sulfurization of magnetron sputtered iron films and characterized by x-ray absorption near edge structure spectra and x-ray photoelectron spectroscopy on a 4B9B beam line at the Beijing Synchrotron Radiation Facility. The band gap of the pyrite agrees well with the optical band gap obtained by a spectrophotometer. The octahedral symmetry of pyrite leads to the splitting of the d orbit into t_{\rm 2g} and e_{\rm g} levels. The high spin and low spin states were analysed through the difference of electron exchange interaction and the orbital crystal field. Only when the crystal field splitting is higher than 1.5 eV, the two weak peaks above the white lines can appear, and this was approved by experiments in the present work.
中图分类号: (Adsorbed layers and thin films)