2024/07/30 by Wu, Beilun, Martínez, Andrés, Obladen, Paula +6 · 1 citation
#FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Strongly Correlated Electrons (cond-mat.str-el)
paper · doi:10.48550/arxiv.2407.20577
We measure Au and Ag atomic-size contacts in magnetic fields, from zero field to 20 T. We find a magnetic field induced torque which leads to atomic binding at shorter distances than at zero field. Furthermore, the conductance drops below G0 at high magnetic fields by about 15% in Au. We calculate the conduction through nanosized Au contacts containing residual O2 molecules attached to the contact region and find a spin polarized current when O2 is located at the atomic contact. We discuss the role of spin-orbit coupling in the magnetic properties of O2 attached to Au.