arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0709.0220cond-mat.supr-con
收藏

面外无序对Bi2Sr2-xRxCuOy(R=La和Eu)赝能隙和费米弧形成的影响

The influence of out-of-plane disorder on the formation of pseudogap and Fermi arc in Bi2Sr2-xRxCuOy (R=La and Eu)

Y. Okada, T. Takeuchi, A. Shimoyamada, S. Shin, H. Ikuta

摘要:

我们发现,费米弧的长度随着增加的面外无序进行角分辨光电子能谱(ARPES)测量在超导状态的最佳掺杂的R=La和Eu的Bi2Sr2 xRxCuOy样品。由于面外无序稳定了正常态的波腹赝能隙,本研究结果表明,这种波腹赝能隙持续到超导态,并减小了费米弧长度。我们认为费米弧的收缩降低了超流密度,这解释了当面外无序增加时超导转变温度的大幅度抑制。

英文摘要:

We found that the length of the Fermi arc decreases with increasing out-of-plane disorder by performing angle resolved photoemission spectroscopy (ARPES) measurements in the superconducting state of optimally doped R=La and Eu samples of Bi2Sr2−xRxCuOy. Since out-of-plane disorder stabilizes the antinodal pseudogap as was shown in our previous study of the normal state, the present results indicate that this antinodal pseudogap persists into the superconducting state and decreases the Fermi arc length. We think that the shrinkage of the Fermi arc reduces the superfluid density, which explains the large suppression of the superconducting transition temperature when out-of-plane disorder is increased.

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。

↑