Self-Doping of Ultrathin Insulating Films by Transition Metal Atoms

被引：20

作者：

Li, Z. ^{[1
]}

Chen, H. -Y. T. ^{[2
]}

Schouteden, K. ^{[1
]}

Lauwaet, K. ^{[1
]}

Giordano, L. ^{[2
]}

Trioni, M. I. ^{[3
]}

Janssens, E. ^{[1
]}

Iancu, V. ^{[1
]}

Van Haesendonck, C. ^{[1
]}

Lievens, P. ^{[1
]}

Pacchioni, G. ^{[2
]}

机构：

[1] Katholieke Univ Leuven, Lab Solid State Phys & Magnetism, BE-3001 Louvain, Belgium

[2] Univ Milano Bicocca, Dipartimento Sci Mat, I-20125 Milan, Italy

[3] ISTM, CNR Natl Res Council Italy, I-20133 Milan, Italy

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 02期

关键词：

TOTAL-ENERGY CALCULATIONS;

D O I：

10.1103/PhysRevLett.112.026102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Single magnetic Co atoms are deposited on atomically thin NaCl films on Au(111). Two different adsorption sites are revealed by high-resolution scanning tunneling microscopy (STM), i.e., at Na and at Cl locations. Using density functional based simulations of the STM images, we show that the Co atoms substitute with either a Na or Cl atom of the NaCl surface, resulting in cationic and anionic Co dopants with a high thermal stability. The dependence of the magnetic coupling between neighboring Co atoms on their separation is investigated via spatially resolved measurement of the local density of states.

引用

页数：5

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