Structure of Self-Assembled Mn Atom Chains on Si(001).
作者信息
Villarreal R, Longobardi M, Köster S A, Kirkham Ch J, Bowler D, Renner Ch
机构信息
Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland.
Division of Precision Science and Technology and Applied Physics, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan.
出版信息
Phys Rev Lett. 2015 Dec 18;115(25):256104. doi: 10.1103/PhysRevLett.115.256104.
Mn has been found to self-assemble into atomic chains running perpendicular to the surface dimer reconstruction on Si(001). They differ from other atomic chains by a striking asymmetric appearance in filled state scanning tunneling microscopy (STM) images. This has prompted complicated structural models involving up to three Mn atoms per chain unit. Combining STM, atomic force microscopy, and density functional theory we find that a simple necklacelike chain of single Mn atoms reproduces all their prominent features, including their asymmetry not captured by current models. The upshot is a remarkably simpler structure for modeling the electronic and magnetic properties of Mn atom chains on Si(001).
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