Transport properties of 2H-NbSe2: Effect of Ga-intercalation

被引：25
|
作者：
Naik, I. [1 ]
Rastogi, A. K. [2 ]
机构：
[1] N Orissa Univ, Dept Phys, Takatpur 757003, Baripada, India
[2] Jawaharlal Nehru Univ, Sch Phys Sci, New Delhi 110067, India
来源：
PHYSICA B-CONDENSED MATTER | 2010年 / 405卷 / 03期
关键词：
Charge density wave; Transition-metal compounds; Superconductivity; CHARGE-DENSITY WAVES; DICHALCOGENIDES; TRANSITION; SUPERCONDUCTIVITY;
D O I：
10.1016/j.physb.2009.10.028
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We have prepared compounds of 2H-NbSe2 and 2H-GaxNbSe2 (x=5% and 10%) at 700 degrees C. 2H-NbSe2 single crystal exhibits superconducting and charge density wave (CDW) transition at 7.4 K and 35 K, respectively, whereas in polycrystalline pellet of poor residual resistance ratio (RRR) value, the CDW is absent. In Ga-intercalated compounds, the rapid decrease of superconducting transition temperature was noticed. Here we report the occurrence of two-band model in which the temperature dependence of mean free path length 'l(epsilon)' is the main factor for overall behavior of resistivity and thermopower. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：955 / 957
页数：3
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