Journal
PHYSICAL REVIEW B
Volume 87, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.235308
Keywords
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Funding
- JSPS [KAKENHI 23560020]
- National Science Council of Taiwan [NSC 98-2112-M-007-017-MY3]
- Grants-in-Aid for Scientific Research [23560020] Funding Source: KAKEN
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Time-resolved measurement of photoemission spectroscopy was made to trace a change of surface potential after the surface photovoltage effect on a Si(111) 7 x 7 surface. Two relaxation processes were found with decay times of nanoseconds and hundreds of nanoseconds, which are explained in terms of the tunneling and the thermionic relaxation schemes, respectively. At the high laser power density, the relaxation has become oscillatory with a temporal period of several tens of nanoseconds.
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