Orbital-selective conductance of Co adatom on the Pt(111) surface

TL;DR

This paper presents an orbital-selective model explaining the magnetic and transport properties of a Co adatom on Pt(111), highlighting the role of different 3d states and their detectability via STM techniques.

Contribution

It introduces an orbital-selective approach combining an Anderson Hamiltonian with Kubo's theory to connect magnetic and transport behaviors of Co/Pt(111).

Findings

Different 3d states influence magnetization and conductance.

Spin polarization and tip distance can manipulate 3d states.

The model enables detection of specific 3d states in STM.

Abstract

We propose an orbital-selective model for the transport and magnetic properties of the individual Co impurity deposited on the Pt(111). Using the combination of the Anderson-type Hamiltonian and the Kubo's linear response theory we show that the magnetization and dI/dV spectrum of Co adatom are originated from the 3d states of the different symmetry. A textbook expression for the spin-dependent differential conductance provides a natural connection between magnetic and transport properties of Co/Pt(111). We found that it is possible to detect and to manipulate the different 3d states of the Co adatom by tuning the spin polarization of the tip and tip-impurity distance in STM experiments.