The effect of temperature on the electronic structure of Nb-doped SrTiO_3(100) surface is investigated by highresolution synchrotron radiation photoemission spectroscopy.According to the x-ray photoemission spectroscopy(XPS)results,at an annealing temperature of less than 700 ℃,the adsorbed carbon and hydroxyl on the STO surface could be removed,to expose the fresh intrinsic surface with a constant ratio of Ti/O.It is obvious that the STO would be doped by Ca~+ impurities of bulks and O vacancies in the sur...
【英文摘要】
The effect of temperature on the electronic structure of Nb-doped SrTiO_3(100) surface is investigated by highresolution synchrotron radiation photoemission spectroscopy.According to the x-ray photoemission spectroscopy(XPS)results,at an annealing temperature of less than 700 ℃,the adsorbed carbon and hydroxyl on the STO surface could be removed,to expose the fresh intrinsic surface with a constant ratio of Ti/O.It is obvious that the STO would be doped by Ca~+ impurities of bulks and O vacancies in the sur...
【基金】
supported by the Funds from the Chinese Academy of Sciences(Grant No.1G2009312311750101);
the National Natural Science Foundation of China(Grant No.11375228)
【更新日期】
2015-04-08
【分类号】
O572.322
【正文快照】
1.Introduction treatment,which is simple,direct,rapid,and pure.[24_27]How-SrTi03(STO)is an oxide with a typical perovskite struc- ever’annealin^at MSh temperatures leads to Ca impurities,ture,and the electronic structure of the STO surface has at-〇vacan
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