IMIT   21220
INSTITUTO DE MODELADO E INNOVACION TECNOLOGICA
Unidad Ejecutora - UE
artículos
Título:
Controlled complete suppression of single-atom inelastic spin and orbital cotunnelling
Autor/es:
BEN BRYANT; RANKO TOSKOVIC; ALEJANDRO FERRON; JOSE LUIS LADO; ANDREA SPINELLI; JOAQUÍN FERNANDEZ-ROSSIER; ALEXANDER OTTE
Revista:
NANO LETTERS (PRINT)
Editorial:
AMER CHEMICAL SOC
Referencias:
Lugar: Washington; Año: 2015 vol. 15 p. 6542 - 6546
ISSN:
1530-6984
Resumen:
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 dz2 orbital, effectively cutting off the STM tip from the spin-flip cotunneling path.