IN A CLEAN HIGH-TC SUPERCONDUCTOR YOU DO NOT SEE THE GAP
IN A CLEAN HIGH-TC SUPERCONDUCTOR YOU DO NOT SEE THE GAP
复制标题
DOI：
10.1103/physrevlett.64.84
复制
发表时间：
1990-01-01
影响因子：
8.6
通讯作者：
DUTTA, B
中科院分区：
文献类型：
--
作者：
KAMARAS, K;HERR, SL;DUTTA, B
激光沉积的YBa 2 Cu 3 O 7− δ薄膜的频率依赖性电导率显示出在140 cm− 1处的中红外吸收和在400-500 cm− 1区域的结构。这些低能量的涨落在Tc以上和以下都发生，使得它们不太可能是通常BCS意义上的超导能隙。由于高Tc材料处于清洁极限，所以穿过差距的吸收很弱;这种弱吸收被中红外吸收所掩盖。
The frequency-dependent conductivity of laser-deposited YBa 2 Cu 3 O 7− δ thin films shows an onset of midinfrared absorption at∼ 140 cm− 1 and structure in the 400–500-cm− 1 region. These low-energy absorptions occur both above and below T c, making them unlikely to be the superconducting gap in the usual BCS sense. The absorption across the gap is weak because the high-T c materials are in the clean limit; this weak absorption is masked by the midinfrared absorption.