期刊
PHYSICAL REVIEW B
卷 84, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.113106
关键词
-
资金
- Department of Science and Technology, Government of India through the S. N. Bose National Centre for Basic Science, India
- Department of Atomic Energy (DAE), Government of India
We report the observation of anomalous bands in graphite valence band structure in angle-resolved photoemission spectroscopy (ARPES) experiments. The photon energy dependence of these bands shows a constant kinetic energy nature. Our results are supported by the very low energy electron diffraction data reported on graphite surfaces which essentially map the unoccupied states representing the photoemission final states. This suggests that the ARPES technique is capable of probing the unoccupied electronic states governed by the secondary electron emission process, along with the occupied bands of solids.
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