JOURNAL CLUB DO DEPARTAMENTO DE FÍSICA DOS MATERIAIS E MECÂNICA – FMT
Nesta semana o pós-graduando Ivan de Paula Miranda, do Grupo Teórico de Materiais, apresentará o artigo: “Tailoring the Chiral Magnetic Interaction Between Two Individual Atoms”.
Dia: 17 de maio, terça-feira, Sala de Seminários José Roberto Leite Ed. Alessandro Volta (bloco C) – Sala 110, IFUSP, às 12h10
Abstract:
Chiral magnets are a promising route towards dense magnetic storage technology due to their inherent nano-scale dimensions and energy efficient properties. Engineering chiral magnets requires atomic-level control of the magnetic exchange interactions, including the Dzyaloshinskii–Moriya interaction, which defines a rotational sense for the magnetization of two coupled magnetic moments. Here we show that the indirect conduction electron-mediated Dzyaloshinskii–Moriya interaction between two individual magnetic atoms on a metallic surface can be manipulated by changing the interatomic distance with the tip of a scanning tunnelling microscope. We quantify this interaction by comparing our measurements to a quantum magnetic model and ab-initiocalculations yielding a map of the chiral ground states of pairs of atoms depending on the interatomic separation. The map enables tailoring the chirality of the magnetization in dilute atomic-scale magnets.
http://www.nature.com/ncomms/2016/160223/ncomms10620/full/ncomms10620.html
