Electronic Transport in Single-Molecule Magnets on Metallic Surfaces

摘要

An electron transport is studied in the system which consists of scanningtunneling microscopy-single molecule magnet-metal. Due to quantum tunneling ofmagnetization in single-molecule magnet, linear response conductance exhibitsstepwise behavior with increasing longitudinal field and each step is maximizedat a certain value of field sweeping speed. The conductance at each steposcillates as a function of the additional transverse magnetic field along thehard axis. Rigorous theory is presented that combines the exchange model withthe Landau-Zener model.