Phys. Rev. Lett. 79, 1094–1097 (1997)Surface Phonons of InP(110) Studied by Raman SpectroscopyReceived 25 March 1997; published in the issue dated 11 August 1997 We demonstrate that surface phonons of clean semiconductor surfaces can be studied by Raman spectroscopy. In this work the vibrational properties of clean InP(110) surfaces are investigated. Two surface phonons of A′ symmetry at 254 and 270cm-1 in the band gap between acoustical and optical bulk branches are observed in agreement with theoretical calculations. Because of their limited resolution previous high-resolution electron-energy-loss spectroscopy experiments found only one surface phonon mode near this energy range. Additionally, three other surface modes at 69, 146, and 347cm-1 are identified by Raman spectroscopy. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.79.1094
DOI:
10.1103/PhysRevLett.79.1094
PACS:
68.35.Ja, 78.30.Fs
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