Scanning Tunneling Microscope Study For Manipulating The Kondo Effect Of Magnetic Atom With Molecular Orbital

Manipulating the spin states of magnetic atom in a single molecular or single atomic scale is important for the construction of artificial structures and functional nanodevices in the"bottom-up" scheme.Scanning Tunneling Microscope(STM)with its high spatial resolution and ability to manipulate the molecule is widely used in the research of molecular adsorption system.In this thesis,we use ultra-high vacuum low temperature scanning tunneling microscope(UHV LT-STM)to investigate the manipulation of Kondo effect of magnetic atom with molecular orbital and the metalation reaction between phthalocyanine and metal atom.In Chapter I,we first introduce the invention,development and fundamental principles of scanning tunneling microscope.We also discuss recent progresses in the STM study of molecular adsorption system.Finally,we briefl y describe the UHV LT-STM system we used in our experiment.In Chapter ?,we use UHV LT-STM to study the Kondo effect of adsorbed cobalt atoms on the gold(111)surface,and manipulate the Kondo effect of cobalt atom through the molecular orbital of cobalt phthalocyanine.We also construct a coupled multi Kondo center complex in a single molecular template.In this complex,the Kondo center is independent,but strongly coupled through the hybridization with delocalized molecular orbital.In Chapter ?,We use copper phthalocyanine and H2 phthalocyanine as the molecular template to construct multi Kondo center complex and manipulate the Kondo effect through different molecule tamplate.In Chapter ?;we investigate metalation reaction of single H2Pc molecule with single cobalt atom.We use STM to manipulate single H2Pc molecule to capture single cobalt atom and construct H2Pc-Col complex.Further manipulating this complex will lead the direct formation of CoPc molecule.The two central H atoms can dissociate when a+3.0V pulse is applied onto the center of H2Pc molecule.We find that the metalation reaction can also take place between the cobalt atom and Pc molecule.This indicates the central H atom is not important in the metalation reaction process.Redox reaction as bond breaking and bond forming is proposed from our experimental results.