Electronic excitations of potassium intercalated manganese phthalocyanine investigated by electron energy-loss spectroscopy

TL;DR

This study investigates how potassium doping alters the electronic excitations of manganese phthalocyanine films, revealing phase changes and effects on magnetic properties through electron energy-loss spectroscopy.

Contribution

It provides new insights into doping-induced phase transitions and electronic structure modifications in MnPc films using EELS.

Findings

Identification of three doped phases: K₁MnPc, K₂MnPc, K₄MnPc

Doping fills orbitals with Mn 3d character affecting magnetic moments

Electronic excitation spectrum changes with doping level

Abstract

The electronic excitations of manganese phthalocyanine (MnPc) films were studied as a function of potassium doping using electron energy-loss spectroscopy in transmission. Our data reveal doping induced changes in the excitation spectrum, and they provide evidence for the existence of three doped phases: K$_1$MnPc, K$_2$MnPc, and K$_4$MnPc. Furthermore, the addition of electrons first leads to a filling of orbitals with strong Mn 3d character, a situation which also affects the magnetic moment of the molecule.