Controlling the Spin of Co Atoms on Pt(111) by Hydrogen Adsorption

被引：53

作者：

Dubout, Q. ^{[1
]}

Donati, F. ^{[1
]}

Waeckerlin, C. ^{[1
]}

Calleja, F. ^{[1
,2
]}

Etzkorn, M. ^{[1
,3
]}

Lehnert, A. ^{[1
]}

Claude, L. ^{[1
]}

Gambardella, P. ^{[1
,4
]}

Brune, H. ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Condensed Matter Phys, CH-1015 Lausanne, Switzerland

[2] IMDEA Nanosci, Madrid Inst Adv Studies, E-28049 Madrid, Spain

[3] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

[4] ETH, Dept Mat, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 10期

基金：

瑞士国家科学基金会;

关键词：

OXIDE/AG TUNNEL-JUNCTIONS; MAGNETIC-ANISOTROPY; EXCHANGE SCATTERING; ANOMALIES; FIELD; TEMPERATURE; MODEL;

D O I：

10.1103/PhysRevLett.114.106807

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the effect of H adsorption on the magnetic properties of individual Co atoms on Pt(111) with scanning tunneling microscopy. For pristine Co atoms, we detect no inelastic features in the tunnel spectra. Conversely, CoH and CoH2 show a number of low-energy vibrational features in their differential conductance identified by isotope substitution. Only the fcc-adsorbed species present conductance steps of magnetic origin, with a field splitting identifying their effective spin as S-eff = 2 for CoH and 3/2 for CoH2. The exposure to H-2 and desorption through tunnel electrons allow the reversible control of the spin in half-integer steps. Because of the presence of the surface, the hydrogen-induced spin increase is opposite to the spin sequence of CoHn molecules in the gas phase.

引用

页数：5

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