Superconductivity at 20 K in yttrium metal at pressures exceeding 1 Mbar

被引：41
|
作者：
Hamlin, J. J.
Tissen, V. G.
Schilling, J. S.
机构：
[1] Washington Univ, Dept Phys, St Louis, MO 63130 USA
[2] Inst Solid State Phys, Chernogolovka 142432, Russia
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2007年 / 451卷 / 02期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/j.physc.2006.10.012
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In experiments in a diamond anvil cell, yttrium metal is found to display a superconducting transition temperature in the ac susceptibility which increases monotonically from 3.5 K at 30 GPa to 19.5 K at 115 GPa, where the transition onset lies at 20 K. This is the second highest value of T-c ever observed for an elemental superconductor. A fit to the Y data using the McMillan equation is consistent with electron-phonon superconductivity with moderately strong coupling. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：82 / 85
页数：4
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