Two-pulse photon echoes from zinc-meso-tetraphenylporphine/polymethylmethacrylate are not consistent with the tunneling two-level system model

被引：8

作者：

Geva, E ^{[1
]}

Skinner, JL

机构：

[1] Univ Wisconsin, Inst Theoret Chem, Madison, WI 53706 USA

[2] Univ Wisconsin, Dept Chem, Madison, WI 53706 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 1998年 / 108卷 / 20期

关键词：

D O I：

10.1063/1.476277

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We argue that the results of a recent two-pulse photon echo study below 2 K on the system zinc-meso-tetraphenyIporphine/polymethyl [S. J. Zilker and D. Haarer, J. Chem. Phys. 105, 10648 (1996)] are inconsistent with the tunneling two-level system model of low temperature glasses. More specifically, the experimental echo decay is exponential in time, and the decay rates are linear in temperature, while the theoretical predictions from the model are nonexponential in time and nonlinear in temperature, for the parameters that appear to be appropriate for this system. (C) 1998 American Institute of Physics. [S0021-9606(98)03120-1]

引用

页码：8485 / 8488

页数：4

共 21 条

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