1D-3D crossover in hopping conduction of carbynes

被引：9
|
作者：
Demishev, SV
Pronin, AA
Sluchanko, NE
Samarin, NA
Lyapin, AG
Brazhkin, VV
Varfolomeeva, TD
Popova, SV
机构：
[1] Russian Acad Sci, Inst Gen Phys, Moscow 117942, Russia
[2] Russian Acad Sci, Inst High Pressure Phys, Troitsk 142092, Moscow Region, Russia
来源：
JETP LETTERS | 2000年 / 72卷 / 07期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1134/1.1331151
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
D.C. and A.C. conductivities of carbyne samples were studied over the temperature range 1.8-300 K at frequencies 10 MHz-1 GHz. It was established that a variation in the fraction of sp(2) bonds in carbynes induces transition from one- to two- and then to three-dimensional conduction. In the one-dimensional hopping conduction regime, the resistivity of carbynes depends on temperature as rho = rho (0) exp[(T-0/T)(1/2)], whereas Coulomb correlations are insignificant. The Hunt model of one-dimensional A.C. conductivity is experimentally confirmed. (C) 2000 MAIK "Nauka/Interperiodica".
引用
收藏
页码：381 / 384
页数：4
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