arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1004.2332cond-mat.supr-con
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d波超导体中H // ab的涡旋态和场角分辨Specific Heat振荡

Vortex State and Field-Angle Resolved Specific Heat Oscillation for H // ab in d-Wave Superconductors

Masayuki Hiragi, Kenta M. Suzuki, Masanori Ichioka, Kazushige Machida

摘要:

在自洽Eilenberger理论的基础上,定量计算了磁场平行于d_{x^2-y^2}波超导体ab平面时,稳定涡旋晶格结构的转变、局域态密度的空间结构以及由磁场取向旋转引起的比热振荡.我们估计了涡旋态随超导能隙节点方向与磁场方向的相对夹角的变化。为了再现CeCoIn_5中观察到的比热振荡的符号变化,我们的研究是通过包括强顺磁效应来完成的。定量的理论计算提供了决定性的信息来分析实验数据的场角依赖性,并建立角分辨比热实验作为光谱手段来确定超导能隙的节点位置。

英文摘要:

When magnetic field is applied parallel to the ab plane in d_{x^2-y^2}-wave superconductors, the transition of stable vortex lattice structure, spatial structure of local density of states, and specific heat oscillation by rotation of magnetic field orientation are investigated by quantitative calculations based on the selfconsistent Eilenberger theory. We estimate how the vortex state changes depending on the relative angle between the node-direction of the superconducting gap and magnetic field orientation. To reproduce the sign-change of specific heat oscillation observed in CeCoIn_5, our study is done by including strong paramagnetic effect. The quantitative theoretical calculations give decisive information to analyze the experimental data on the field-angle dependence, and establish the angle-resolved specific heat experiment as a spectroscopic means to identify the node-position of the superconducting gap.

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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