Interplay between plasmons and the band structure for the Mo(112) surface

被引:35
作者
Yakovkin, IN
Zhang, JD
Dowben, PA
机构
[1] Natl Acad Sci Ukraine, Inst Phys, UA-03039 Kiev, Ukraine
[2] Florida Int Univ, Dept Phys, Miami, FL 33199 USA
[3] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA
[4] Univ Nebraska, Ctr Mat Res & Anal, Behlen Lab Phys, Lincoln, NE 68588 USA
关键词
D O I
10.1103/PhysRevB.63.115408
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Recent photoemission and inverse photoemission results for the Mo(112) surface are discussed in the framework of the calculated band structure. For the Mo(112) surface, the main photoemission features combine contributions from both the surface and the bulk. Except for those photon energies near to excitations of the bulk and multipole surface plasmons, the comparison of the bulk band structure, along the k points normal to the surface, shows a good agreement with photoemission spectra in the position of the critical points. The dominant surface states at <(<Gamma>)over bar> are found to have the a(1) symmetry, while the band along <(<Gamma>)over bar>-(Y) over bar at about 0.8 eV binding energy is found to be odd with respect to the <(<Gamma>)over bar>-(X) over bar mirror plane. The surface-induced enhancement of photoemission-the surface photoeffect-is indicated and is shown to be responsible for dramatic changes in the spectra when the photon energy falls into the region of the multipole surface plasmons.
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页数:7
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