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{\Large \bf Surface Physics Group}\\

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Professor          &:&Shozo~Suto\\
Assistant Professor&:&Kazuyuki~Sakamoto\\
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(http://surface.phys.tohoku.ac.jp/)\\
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      We are interested in the physics at surfaces, interfaces, 
    nano-structures and other novel low dimensional structures,
    where electrons behave quite differently from the electrons 
    in the bulk.  
    The first goal of our group is to investigate 
    electronic states and phase transitions in the low
    dimensional structures.  
    The second goal is to understand the 
    surface potential to control initial stages of film growth 
    and nano-structure formation.
    The third goal is to understand electronic 
    excitations at metal and semiconductor surfaces manifested 
    by surface plasmons and interband transitions. 
    Our main 
    experimental techniques are high 
    resolution electron energy loss  spectroscopy (HREELS)
    with 0.5 meV resolution, photo-electron spectroscopy(PES) 
    and variable temperature scanning tunneling microscopy(VT-STM). 
    The low energy electrons of about 10eV are very sensitive for 
    vibrational and electronic excitations.  We measure the surface 
    band structures using an ultraviolet light source and the core level
    states at surface atoms using a soft xray source. 
    In order to correlate the macroscopic information on electronic and
    vibrational excitations with microscopic structures, we have constructed
    a combined measurement system of HREELS and STM.

  
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