排序方式: 共有15条查询结果,搜索用时 156 毫秒
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C. F. J. Flipse G. van der Laan B. T. Thole S. Myhra 《Zeitschrift für Physik B Condensed Matter》1993,90(1):89-91
Polarization dependent X-ray absorption measurements on single crystal Bi2Sr2CuO6 (T
c
=9 K) and Bi2Sr2CaCu2O8 (T
c
=80 K) with one and two CuO2 layers, respectively, show no energy shift of the Cu 2p main peak, and no relation between the amount of 3d(m=0, ±1) character and the critical temperatureT
c
. At grazing incidence a structure in Bi2Sr2CaCu2O8 is found at 937 eV, which can be ascribed to a composite state of Cu 3d(z
2), Cu 4s ando–2p(z). 相似文献
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J.W. Niemantsverdriet C.F.J. Flipse B. Selman J.J. Van Loef A.M. Van der Kraan 《Physics letters. A》1984,100(8):445-447
Particle motion due to thermal agitation causes the recoilless fraction, ?, of microcrystals α-FeOOH to decrease more strongly with temperature than expected on the base of lattice vibrations only. Hence, Debye temperatures, θD, derived from data are too low. Analysis of the second-order Doppler shift yields the correct values of θD. For bulk α-FeOOH both methods yield identical values of θD. 相似文献
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v Laarhoven HA Flipse CF Koeberg M Bonn M Hendry E Orlandi G Jurchescu OD Palstra TT Troisi A 《The Journal of chemical physics》2008,129(4):044704
Terahertz transient conductivity measurements are performed on pentacene single crystals, which directly demonstrate a strong coupling of charge carriers to low frequency molecular motions with energies centered around 1.1 THz. We present evidence that the strong coupling to low frequency motions is the factor limiting the conductivity in these organic semiconductors. Our observations explain the apparent paradox of the "bandlike" temperature dependence of the conductivity beyond the validity limit of the band model. 相似文献
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We present thermoelectric measurements of the heat dissipated due to ferromagnetic resonance of a Permalloy strip. A microwave magnetic field, produced by an on-chip coplanar strip waveguide, is used to drive the magnetization precession. The generated heat is detected via Seebeck measurements on a thermocouple connected to the ferromagnet. The observed resonance peak shape is in agreement with the Landau-Lifshitz-Gilbert equation and is compared with thermoelectric finite-element modeling. Unlike other methods, this technique is not restricted to electrically conductive media and is therefore also applicable to for instance ferromagnetic insulators. 相似文献
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Otero G González C Pinardi AL Merino P Gardonio S Lizzit S Blanco-Rey M Van de Ruit K Flipse CF Méndez J de Andrés PL Martín-Gago JA 《Physical review letters》2010,105(21):216102
We have studied large areas of (√3×√3)R30° graphene commensurate with a Pt(111) substrate. A combination of experimental techniques with ab initio density functional theory indicates that this structure is related to a reconstruction at the Pt surface, consisting of an ordered vacancy network formed in the outermost Pt layer and a graphene layer covalently bound to the Pt substrate. The formation of this reconstruction is enhanced if low temperatures and polycyclic aromatic hydrocarbons are used as molecular precursors for epitaxial growth of the graphene layers. 相似文献
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