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arXiv 0904.4079cond-mat.supr-concond-mat.str-el
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(Bi,Pb)_2Sr_2CuO_6超导体超导能隙的成对诱导赝能隙演化

Evolution of a pairing-induced pseudogap from the superconducting gap of (Bi,Pb)2Sr2CuO6

K. Nakayama, T. Sato, Y. Sekiba, K. Terashima, P. Richard, T. Takahashi, K. Kudo, N. Okumura, T. Sasaki, N. Kobayashi

摘要:

我们已经进行了超高分辨率角分辨光电子能谱研究轻微过掺杂的(Bi,Pb)2Sr2CuO6的赝能隙的起源阐明。利用一种新研制的氙等离子体光源,测量了超导能隙和赝能隙的动量和温度的综合关系。我们发现,波腹赝能隙在远高于超导转变温度时仍然存在,并且与波节能隙平滑地连接。赝能隙的特征温度与超导能隙的大小成比例关系,与动量位置无关。目前的实验结果指出的pseudogap的配对起源。

英文摘要:

We have performed an ultrahigh-resolution angle-resolved photoemission spectroscopy study of slightly-overdoped (Bi,Pb)2Sr2CuO6 to elucidate the origin of pseudogap. By using a newly developed xenon-plasma light source, we determined the comprehensive momentum and temperature dependences of the superconducting gap and the pseudogap. We found that the antinodal pseudogap persists far above the superconducting transition temperature and is smoothly connected to the nodal gap. The characteristic temperature of the pseudogap scales well with the superconducting-gap size irrespective of the momentum location. The present experimental results point to the pairing origin of the pseudogap.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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