Spin locking at the apex of nano-scale platinum tips

SURFACE SCIENCE

卷:618

Article

Korytar, Richard¹  Evers, Ferdinand^1,2,3 

[1] KIT, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany

[2] KIT, Inst Theorie Kondensierten Mat, D-76128 Karlsruhe, Germany

[3] KIT, DFG Ctr Funct Nanostruct, D-76131 Karlsruhe, Germany

关键词: Molecular electronics;    Nano-magnetism;    Platinum electrode;    First-principles calculations;   

DOI  :  10.1016/j.susc.2013.09.008

来源: Elsevier

【 摘 要 】

Nanostructures based on platinum, such as small clusters or STM-tips, often exhibit an atomistic structure that relies upon one or very few strongly under-coordinated platinum atoms. Here, we analyze a paradigmatic example, an apex atom on a pyramidal platinum cluster employing the density functional theory. We show that such a pristine platinum tip exhibits a spin polarization of the apex atom with a remarkable robustness. Due to a depletion of the projected density of states at the apex position, the apex-magnetization is efficiently locked to about 0.6 mu(B). (C) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

Free