Acceder al contenido principalAcceder al menú principal'>Formulario de contacto'>La UAM

Facultad de CienciasFacultad de Ciencias

Influence of Magnetic Ordering between Cr Adatoms on the Yu-Shiba-Rusinov States of the β−Bi2Pd Superconductor

24/04/2018
Influence of Magnetic Ordering between Cr Adatoms on the Yu-Shiba-Rusinov States of the β−Bi2Pd Superconductor

Article: published in Physical Review Letters by Isabel Guillamón and Hermann Suderow, IFIMAC researchers and members of the Department of Condensed Matter Physics.

We show that the magnetic ordering of coupled atomic dimers on a superconductor is revealed by their intragap spectral features. Chromium atoms on the superconductor β−Bi2Pd surface display Yu-Shiba-Rusinov bound states, detected as pairs of intragap excitations in tunneling spectra. By means of atomic manipulation with a scanning tunneling microscope’s tip, we form Cr dimers with different arrangements and find that their intragap features appear either shifted or split with respect to single atoms. These spectral variations are associated with the magnetic coupling, ferromagnetic or antiferromagnetic, of the dimer, as confirmed by density functional theory simulations. The striking qualitative differences between the observed tunneling spectra prove that intragap Shiba states are extremely sensitive to the magnetic ordering on the atomic scale. [Full article]

Universidad Autónoma de Madrid © 2008 · Ciudad Universitaria de Cantoblanco · 28049 Madrid · Información y Conserjería: 91 497 43 31 E-mail:  informacion.ciencias@uam.es
Gestión de estudiantes de Grado y Posgrado: 91 497 8264 / 4329 / 4353 / 4349 / 6879 / 8362 E-mail:  administracion.ciencias@uam.es