Enhanced surface anharmonicity observed in vibrations on Cu(110).
作者： A. P. Baddorf , E. W. Plummer
DOI: 10.1103/PHYSREVLETT.66.2770
关键词: Phonon 、 Condensed matter physics 、 Center (category theory) 、 Materials science 、 Resonance 、 Anharmonicity 、 Molecular physics 、 Brillouin zone 、 Surface phonon 、 Surface energy 、 Energy (signal processing)
摘要: Surface anharmonicity has been measured on Cu(110) by examining the temperature dependence of surface phonons with atomic motion normal to using high-resolution electron-energy-loss spectroscopy. At Brillouin zone center {bar {Gamma}} energy {ital MS}{sub 7} resonance decreases 3.2 meV and intrinsic width increased 8.6 as increases from 21 766 K. Energy decrease increase are also observed at edge Y}} in S}{sub 3} phonon. The percentage is same both phonons. Direct comparison bulk-phonon measurements shows that 4.1--4.8 times greater than bulk.
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sci-hub.se 参考文章(19)
S.K.S. Ma, F.W. De Wette, G.P. Alldredge, Surface relaxation and thermal expansion for the (001) face of α-Fe and Cu Surface Science. ,vol. 78, pp. 598- 624 ,(1978) , 10.1016/0039-6028(78)90236-4
C. S. Jayanthi, E. Tosatti, L. Pietronero, SURFACE MELTING OF COPPER Physical Review B. ,vol. 31, pp. 3456- 3459 ,(1985) , 10.1103/PHYSREVB.31.3456
Joost W. M. Frenken, Frank Huussen, J. F. van der Veen, Evidence for anomalous thermal expansion at a crystal surface Physical Review Letters. ,vol. 58, pp. 401- 404 ,(1987) , 10.1103/PHYSREVLETT.58.401
J. Kirschner, R. Feder, Experimental and theoretical analysis of temperature effects in spin-polarized low energy electron diffraction from W(001) Surface Science. ,vol. 104, pp. 448- 462 ,(1981) , 10.1016/0039-6028(81)90071-6
G. Armand, J. R. Manson, Inelastic Low-Energy Atom-Surface Scattering Physical Review Letters. ,vol. 53, pp. 1112- 1115 ,(1984) , 10.1103/PHYSREVLETT.53.1112
D. Gorse, J. Lapujoulade, A study of the high temperature stability of low index planes of copper by atomic beam diffraction Surface Science. ,vol. 162, pp. 847- 857 ,(1985) , 10.1016/0039-6028(85)90988-4
G Armand, D Gorse, J Lapujoulade, J. R Manson, The Dynamics of Cu(100) Surface Atoms at High Temperature EPL. ,vol. 3, pp. 1113- 1118 ,(1987) , 10.1209/0295-5075/3/10/010
RS Williams, PS Wehner, J Stöhr, DA Shirley, None, THERMALLY INDUCED BREAKDOWN OF THE DIRECT-TRANSITION MODEL IN COPPER Physical Review Letters. ,vol. 39, pp. 302- 305 ,(1977) , 10.1103/PHYSREVLETT.39.302
S. G. J. Mochrie, Thermal roughening of the copper (110) surface: An x-ray diffraction experiment. Physical Review Letters. ,vol. 59, pp. 304- 307 ,(1987) , 10.1103/PHYSREVLETT.59.304
Peter Zeppenfeld, Klaus Kern, Rudolf David, George Comsa, No thermal roughening on Cu(110) up to 900 K. Physical Review Letters. ,vol. 62, pp. 63- 66 ,(1989) , 10.1103/PHYSREVLETT.62.63