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

Tutkimustuotos: Lehtiartikkeli


  • Benjamin Bryant
  • Ranko Toskovic
  • Alejandro Ferrón
  • Jose Lado

  • Anna Spinelli
  • Joaquín Fernández-Rossier
  • Alexander F. Otte


  • Department of Quantum Nanoscience, TU Delft
  • International Iberian Nanotechnology Laboratory
  • Consejo Nacional de Investigaciones Científicas y Técnicas
  • University of Alicante


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.


JulkaisuNano Letters
TilaJulkaistu - 14 lokakuuta 2015
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 36720413