ARPES study of the effect of Cu substitution on the electronic structure of NaFeAs

作者：Cui S T^*; Kong S; Ju S L; Wu P; Wang A F; Luo X G; Chen X H; Zhang G B; Sun Z

来源：Physical Review B, 2013, 88(24): 245112.

DOI：10.1103/PhysRevB.88.245112

Using high-resolution angle-resolved photoemission spectroscopy, we studied the electronic structure of NaFe1-xCuxAs (x = 0.019,0.045,0.14). With increasing the doping concentration, we found that the Cu dopant introduces extra charge carriers. The overall band dispersions barely change with doping, suggesting that the Cu substitution does not affect local correlations. Similar to the case of NaFe1-xCoxAs, one electron pocket emerges at the Brillouin zone center at high doping levels. Moreover, the near-E-F spectral weight decreases with increasing the Cu dopant, which explains why the NaFe1-xCuxAs shows a poor electronical conductivity at high doping levels.

• 出版日期2013-12-10
• 单位中国科学技术大学