| 1. |
- Nyholm, R., et al.
(författare)
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The surface core-level shift of the Pd(100) single-crystal surface
- 1992
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Ingår i: Journal of Physics: Condensed Matter. - : IOP Publishing. - 0953-8984 .- 1361-648X. ; 4:1, s. 277-283
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Tidskriftsartikel (refereegranskat)abstract
- The surface core-level shift of the Pd(100) single-crystal surface has been measured from high-resolution Pd 3d core-level spectra. The surface atoms are found to have 0.44+or-0.03 eV lower binding energy than the bulk atoms. The result is compared with theoretical estimates.
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| 2. |
- Andersson, Staffan, 1952-, et al.
(författare)
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Thermal conductivity and heat capacity of amorphous SiO2 : pressure and volume dependence
- 1992
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Ingår i: Journal of Physics. - : Institute of Physics (IOP). - 0953-8984 .- 1361-648X. ; 4:29, s. 6209-6216
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Tidskriftsartikel (refereegranskat)abstract
- The thermal conductivity (lambda) and heat capacity per unit volume (rho-c(p)) of amorphous SiO2 have been measured under hydrostatic pressure up to 1 GPa at room temperature using a transient two-strip method. The thermal conductivity was found to decrease slightly with increasing pressure. For the volume dependence of lambda expressed by the Bridgman parameter, g = -(partial derivative ln lambda/partial derivative ln V)T, we obtained g = -1.5. The experimental value of g is discussed in conjunction with predicted g-values based on theoretical models of lambda(T). The specific heat capacity (c(p)) calculated from measured rho-c(p) was found to be almost constant with increasing pressure.
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| 3. |
- Karlsson, Krister, 1961-, et al.
(författare)
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Chemical shifts for monovalent, divalent and trivalent Cu compounds
- 1992
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Ingår i: Journal of Physics. - : Institute of Physics Publishing (IOPP). - 0953-8984 .- 1361-648X. ; 4:3, s. 895-909
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Tidskriftsartikel (refereegranskat)abstract
- The authors study the chemical shift of the Cu 2p core level for Cu 2O, CuO and NaCuO2, where Cu is formally monovalent, divalent and trivalent, respectively. They find that the binding energy increases with the valence, as expected, although the variation in the number of 3d electrons is small and the trivalent Cu atom is found to have a smaller net positive charge than the monovalent or divalent Cu. The origin of the calculated chemical shifts is analysed and the relation with the chemical valence is discussed.
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| 4. |
- Karlsson, Krister, 1961-, et al.
(författare)
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Shape of the Cu 2p core level photoemission spectrum for monovalent, divalent and trivalent Cu compounds
- 1992
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Ingår i: Journal of Physics. - : Institute of Physics Publishing (IOPP). - 0953-8984 .- 1361-648X. ; 4:11, s. 2801-2816
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Tidskriftsartikel (refereegranskat)abstract
- We calculate the shape of the 2p core level photoemission spectrum for Cu2O, CuO and NaCuO2, where Cu is formally mono-, di- and trivalent, respectively. Although the number of 3d electrons is similar in the three compounds, there is a large variation in the strength of the d9-like satellite and in the width of the main line. We relate the differences between Cu2O and CuO to the difference in the valence, while for NaCuO2 the detailed form of the hopping matrix elements is also found to be important. © 1992 IOP Publishing Ltd.
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