Meissner effect of Superconducting InN
Meissner effect of Superconducting InN
复制标题
超导 InN 的迈斯纳效应
DOI：
10.1002/pssc.200983112
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
D. Muto and Y. Nanishi
中科院分区：
文献类型：
--
作者：
T. Inushima;D. K. Maude;D. Muto and Y. Nanishi
我们报道了InN的BCS型超导电性。载流子浓度为7×1018 cm-3的样品在∼为0.8K时为零电阻，在0.2K时表现为BCS型迈斯纳效应。尽管涡旋固体在∼2.5K的热涨落和外加磁场的作用下熔化，但10̄1 0的局域载流子抑制了迈斯纳相的出现，使超导电性转变为BCS型，相干长度与理想金属In相当。基于4d和N_2S杂化产生的次近邻In-In原子之间相互作用产生的残余载流子，提出了InN超导电性的一种机制(2010Wiley-VCH Verlag GmbH&Co.KGaA，Weinheim)
We report on the BCS‐type superconductivity of InN. A sample with a carrier concentration ne of 7× 1018cm–3 is found to become zero resistance at∼ 0.8 K and show BCS type Meissner effect at 0.2 K onset. Though the vortex solid is melted by thermal fluctuation and by external magnetic field from∼ 2.5 K, the occurrence of the Meissner phase is suppressed by localized carriers along 10 ̄1 0, which changes the character of the superconductivity into BCS type and the coherent length becomes comparable to that of ideal metal In. A mechanism which causes superconductivity in InN is proposed on the basis of the residual carriers produced by the interaction among the second nearest neighbor In‐In atoms originating from In 4d and N 2s hybridization (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)