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WORK FUNCTION AND CHARGE TRANSFER OF OVERLAYER-SUBSTRATE SYSTEM: Cs ON Ir (001)

CHEN LU-JUN WANG NING LUO EN-ZE

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WORK FUNCTION AND CHARGE TRANSFER OF OVERLAYER-SUBSTRATE SYSTEM: Cs ON Ir (001)

CHEN LU-JUN, WANG NING, LUO EN-ZE
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  • The work function of Ir(100) surface coated with Cs overlayer is investigated by using jellium sphere/slab model containing three layers of Ir slab. A work function-coverage curve much reasonably closer to the experimental one is lbtained. The theoretical value of work function of clean surface is reduced to 5. 84 eV from the former result of 6.6 eV, which is in good agreement with experiment (5.5 eV). At the minimum, work function rises to 1.02 eV from former one (about 0.2 eV), which is much closer to the experimental result (about 1.3 eV). The relationship between the appearance of work function-coverage curve and the transfer of valence electrons in jellium sphere-vacuum region is analyzed.
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  • Received Date:  31 August 1992
  • Published Online:  10 July 2005

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