Fe-Vacancy-Induced Ferromagnetism in Tetragonal FeSe Thin Films  

作　　者：李永峰 刘贵斌 石丽洁 刘邦贵 

机构地区：[1]Institute of Physics, Chinese Academy of Sciences, Beijing 100190Beijing National Laboratory for Condensed Matter Physics, Beijing 100190

出　　处：《Chinese Physics Letters》2009年第12期229-231,共3页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10874232, 10774180 and 60621091, the Knowledge Innovation Project of Chinese Academy,of Sciences under Grant No KJCX2.YW.W09-5, and the National Basic Research Program of China under Grant No 2005CB623602.

摘　　要：Motivated by recent experiments, we investigate structural, electronic, and magnetic properties of tetragonal FeSe with Fe vacancies using the state-of-the-art first-principles method. We show that Fe vacancies tend to stay in the same one of the two sublattices and thus induce ferromagnetism in the ground-state phase. Our calculated net moment is in good agreement with the experimental data available. Therefore, the ferromagnetism observed in tetragonal FeSe thin films is explained. It could be made controllable soon for spintronic applications.Motivated by recent experiments, we investigate structural, electronic, and magnetic properties of tetragonal FeSe with Fe vacancies using the state-of-the-art first-principles method. We show that Fe vacancies tend to stay in the same one of the two sublattices and thus induce ferromagnetism in the ground-state phase. Our calculated net moment is in good agreement with the experimental data available. Therefore, the ferromagnetism observed in tetragonal FeSe thin films is explained. It could be made controllable soon for spintronic applications.

关 键 词：Condensed matter: electrical magnetic and optical Surfaces interfaces and thin films Condensed matter: structural mechanical & thermal 

分 类 号：O484.43[理学—固体物理] O4-33[理学—物理]