纳米限制条件下镓的超导性与结构

Superconductivity and structure of gallium under nanoconfinement.

作者信息

Charnaya E V, Tien Cheng, Lee Min Kai, Kumzerov Yu A

机构信息

Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan, Republic of China.

出版信息

J Phys Condens Matter. 2009 Nov 11;21(45):455304. doi: 10.1088/0953-8984/21/45/455304. Epub 2009 Oct 23.

DOI:10.1088/0953-8984/21/45/455304

PMID:21694009

Abstract

Superconductivity and crystalline structure were studied for two nanocomposites consisting of gallium loaded porous glasses with different pore sizes. The superconducting transition temperatures were found to differ from those in known bulk gallium modifications. The transition temperatures 7.1 and 6.7 K were ascribed to two new confined gallium structures, ι- and κ-Ga, observed by synchrotron radiation x-ray powder diffraction. The evolution of superconductivity on decreasing the pore filling with gallium was also studied.

摘要

对由不同孔径的载镓多孔玻璃组成的两种纳米复合材料的超导性和晶体结构进行了研究。发现超导转变温度与已知的块状镓变体中的转变温度不同。转变温度7.1 K和6.7 K归因于通过同步辐射X射线粉末衍射观察到的两种新的受限镓结构，即ι-Ga和κ-Ga。还研究了随着镓填充量减少超导性的演变。