Surface phonons of TiC(310)

M. Wuttig; C. Oshima; T. Aizawa; R. Souda; S. Otani; Y. Ishizawa

doi:10.1016/0039-6028(88)90330-5

Surface phonons of TiC(310)

M. Wuttig, C. Oshima, T. Aizawa, R. Souda, S. Otani, Y. Ishizawa

Research output: Contribution to journal › Article

12 Citations (Scopus)

Abstract

We have observed the vibrational spectrum of a stepped surface, the TiC(310) surface by means of electron energy loss spectroscopy (EELS). Apart from two losses at 61 and 80 meV, which are similar to those observed for the flat TiC(100) surface in specular direction, three new loss features appear at the G{cyrillic}-point at 18, 28 and 49 meV respectively. These loss peaks are due to a "backfolding" of surface phonons. Small frequency shifts are caused by a "mixing" of these modes. All frequencies can be reproduced by our lattice dynamical calculations if we assume that the force constants for the terrace atoms are very similar to the force constants at the flat TiC(100) surface. Only the force constants in the vicinity of the steps have to be changed.

Original language	English
Pages (from-to)	180-192
Number of pages	13
Journal	Surface Science
Volume	193
Issue number	1-2
DOIs	https://doi.org/10.1016/0039-6028(88)90330-5
Publication status	Published - 1988

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ASJC Scopus subject areas

Physical and Theoretical Chemistry
Condensed Matter Physics
Surfaces and Interfaces

Cite this

Wuttig, M., Oshima, C., Aizawa, T., Souda, R., Otani, S., & Ishizawa, Y. (1988). Surface phonons of TiC(310). Surface Science, 193(1-2), 180-192. https://doi.org/10.1016/0039-6028(88)90330-5

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T1 - Surface phonons of TiC(310)

AU - Wuttig, M.

AU - Oshima, C.

AU - Aizawa, T.

AU - Souda, R.

AU - Otani, S.

AU - Ishizawa, Y.

PY - 1988

Y1 - 1988

N2 - We have observed the vibrational spectrum of a stepped surface, the TiC(310) surface by means of electron energy loss spectroscopy (EELS). Apart from two losses at 61 and 80 meV, which are similar to those observed for the flat TiC(100) surface in specular direction, three new loss features appear at the G{cyrillic}-point at 18, 28 and 49 meV respectively. These loss peaks are due to a "backfolding" of surface phonons. Small frequency shifts are caused by a "mixing" of these modes. All frequencies can be reproduced by our lattice dynamical calculations if we assume that the force constants for the terrace atoms are very similar to the force constants at the flat TiC(100) surface. Only the force constants in the vicinity of the steps have to be changed.

AB - We have observed the vibrational spectrum of a stepped surface, the TiC(310) surface by means of electron energy loss spectroscopy (EELS). Apart from two losses at 61 and 80 meV, which are similar to those observed for the flat TiC(100) surface in specular direction, three new loss features appear at the G{cyrillic}-point at 18, 28 and 49 meV respectively. These loss peaks are due to a "backfolding" of surface phonons. Small frequency shifts are caused by a "mixing" of these modes. All frequencies can be reproduced by our lattice dynamical calculations if we assume that the force constants for the terrace atoms are very similar to the force constants at the flat TiC(100) surface. Only the force constants in the vicinity of the steps have to be changed.

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10.1016/0039-6028(88)90330-5