INTERPRETATION OF RESISTIVITY OF ND1.85CE0.15CUO4-Y USING THE ELECTRON-PHONON SPECTRAL-FUNCTION DETERMINED FROM TUNNELING DATA

被引:26
作者
TRALSHAWALA, N [1 ]
ZASADZINSKI, JF [1 ]
COFFEY, L [1 ]
HUANG, Q [1 ]
机构
[1] ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA
关键词
D O I
10.1103/PhysRevB.44.12102
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Tunneling measurements of alpha-2F(omega) of Nd1.85Ce0.15CuO4-y, are shown to be in good agreement with recent published results of the phonon density of states F(omega) from neutron scattering. The locations of peaks and valleys in both functions are similar but the spectral weights differ suggesting that alpha-2 has a strong energy dependence. We have used alpha-2F(omega) to estimate the phonon Contribution, rho(phonon)(T), to published data of the temperature-dependent resistivity, rho(T), for thin films and single crystals of Nd1.85Ce0.15CuO4-7. When the phonon contribution is subtracted from the experimental data, a clear T2 Contribution remains over most of the temperature range. The T2 contribution is interpreted to be due to three-dimensional electron-electron scattering, rho(e-e). There is also a correlation between the magnitude of rho(e-e), and the value of the plasma frequency, omega(p) [obtained from the determination of rho(phonon)(T)], with a scaling which approximates omega(p)-10/3. Such a scaling is expected from the carrier concentration dependence of electron-electron scattering.
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页码:12102 / 12105
页数:4
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