Positron lifetimes in TTF-TCNQ and kappa-(BEDT-TTF)(2)Cu(NCS)(2) single crystals

被引：0
|
作者：
Ishibashi, S
Tokumoto, M
Kinoshita, N
Terada, N
Ihara, H
Suzuki, R
Ohdaira, T
Mikado, T
Anzai, H
机构：
[1] ELECTROTECH LAB, QUANTUM RADIAT DIV, HIGH ENERGY RADIAT SECT, TSUKUBA, IBARAKI 305, JAPAN
[2] HIMEJI INST TECHNOL, KAMIGORI, HYOGO 67812, JAPAN
来源：
APPLIED SURFACE SCIENCE | 1997年 / 116卷
关键词：
D O I：
10.1016/S0169-4332(96)01073-2
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：
Positron lifetimes in TTF-TCNQ (tetrathiafulvalene-tetracyanoquinodimethane) and K-(BEDT-TTF)(2)Cu(SCN)(2) (BEDT-TTF: bis(ethylenedithio)tetrathiafulvalene) single crystals have been measured utilizing a pulsed variable-energy positron beam. The bulk positron lifetimes are 338 and 357 ps, respectively, The incident positron energy dependence of the lifetime is rather weak for both materials. Theoretical simulations have been also performed with several descriptions of the electronic wave functions and the electron-positron correlation. Results are compared with each other and the experiments.
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页码：300 / 303
页数：4
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