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85037503780
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Specifically, the TO frequency was observed to increase with decreasing film thickness below 100 Å, the opposite of (1) the effect seen in chemically etched films studied both herein and by other workers (see Ref. 10), and (2) the effect seen in films grown (see Ref. 38) to thicknesses of 7-25 Å (no chemical etching involved)
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Specifically, the TO frequency was observed to increase with decreasing film thickness below 100 Å, the opposite of (1) the effect seen in chemically etched films studied both herein and by other workers (see Ref. 10), and (2) the effect seen in films grown (see Ref. 38) to thicknesses of 7-25 Å (no chemical etching involved).
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22
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85037505336
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To simplify the analysis we have neglected the effects of a parallel-oriented image dipole, under the assumption that the effect of the perpendicular image dipole is significantly stronger
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To simplify the analysis we have neglected the effects of a parallel-oriented image dipole, under the assumption that the effect of the perpendicular image dipole is significantly stronger.
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24
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85037517717
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In fact, addition of 1 Å slabs overestimates the effect of the image charge shift in the thinnest slabs, since this analysis does not take into account Coulombic coupling between layers which will weigh the higher frequency components of the LO more heavily than the lower frequency ones
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In fact, addition of 1 Å slabs overestimates the effect of the image charge shift in the thinnest slabs, since this analysis does not take into account Coulombic coupling between layers which will weigh the higher frequency components of the LO more heavily than the lower frequency ones.
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26
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85037494124
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2 films into the central force model (see Ref. 10)
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2 films into the central force model (see Ref. 10).
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27
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85037521317
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note
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2, respectively.
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33645691733
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R. W. Cohen, D. G. Cody, M. D. Coutts, and B. Abeles, Phys. Rev. B 8, 3689 (1973).
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Abeles, B.4
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33
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0012354789
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A. B. Gurevich, M. K. Weldon, Y. J. Chabal, R. L. Opila, and J. Sapjeta, Appl. Phys. Lett. 74, 1257 (1999).
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Sapjeta, J.5
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34
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0001593944
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M. K. Weldon, B. B. Stefanov, K. Raghavachari, and Y. J. Chabal, Phys. Rev. Lett. 79, 2851 (1997).
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Weldon, M.K.1
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35
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33847571146
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P. G. Pai, S. S. Chao, Y. Takagi, and G. Lucovsky, J. Vac. Sci. Technol. A 4, 689-694 (1986).
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Pai, P.G.1
Chao, S.S.2
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Lucovsky, G.4
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37
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85037518525
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2 in the unetched sample yields a thickness of 4.5 Å for the substoichiometric region. While this result is somewhat larger than the amount of suboxide estimated from the thinnest films, it is still less than 6 Å and is therefore consistent with the conclusion that the substoichiometric region is thinner than the thinnest film. Furthermore, the experimental error is expected to be much larger in the thicker film due to the very small amount of suboxide intensity detected in this sample
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2 in the unetched sample yields a thickness of 4.5 Å for the substoichiometric region. While this result is somewhat larger than the amount of suboxide estimated from the thinnest films, it is still less than 6 Å and is therefore consistent with the conclusion that the substoichiometric region is thinner than the thinnest film. Furthermore, the experimental error is expected to be much larger in the thicker film due to the very small amount of suboxide intensity detected in this sample.
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