Controlled Complete Suppression of Single-Atom Inelastic Spin and Orbital Cotunneling

被引:23
|
作者
Bryant, Benjamin [1 ]
Toskovic, Ranko [1 ]
Ferron, Alejandro [2 ,3 ]
Lado, Jose L. [2 ]
Spinelli, Anna [1 ]
Fernandez-Rossier, Joaquin [2 ,4 ]
Otte, Alexander F. [1 ]
机构
[1] Delft Univ Technol, Kavli Inst Nanosci, Dept Quantum Nanosci, NL-2628 CJ Delft, Netherlands
[2] Int Iberian Nanotechnol Lab INL, P-4715330 Braga, Portugal
[3] CONICET UNNE, Inst Modelado & Innovac Tecnol, Corrientes, Argentina
[4] Univ Alicante, Dept Fis Aplicada, San Vicente Del Raspeig 03690, Spain
关键词
Magnetocrystalline anisotropy; strain; spin excitation; scanning tunneling microscopy; MAGNETIC-ANISOTROPY; SEMICONDUCTOR; SPECTROSCOPY; NANOMAGNETS; MOLECULE;
D O I
10.1021/acs.nanolett.5b02200
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The inelastic portion of the tunnel current through an individual magnetic atom grants unique access to read out and change the atom's spin state, but it also provides a path for spontaneous relaxation and decoherence. Controlled closure of the inelastic channel would allow for the latter to be switched off at will, paving the way to coherent spin manipulation in single atoms. Here, we demonstrate complete closure of the inelastic channels for both spin and orbital transitions due to a controlled geometric modification of the atom's environment, using scanning tunneling microscopy (STM). The observed suppression of the excitation signal, which occurs for Co atoms assembled into chains on a Cu2N substrate, indicates a structural transition affecting the d(z)(2) orbital, effectively cutting off the STM tip from the spin-flip cotunneling path.
引用
收藏
页码:6542 / 6546
页数:5
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