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arXiv 1111.5388cond-mat.supr-concond-mat.str-el
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场角分辨测量CeIrIn5的超导能隙结构及其specific heat

Superconducting gap structure of CeIrIn5 from field-angle-resolved measurements of its specific heat

Shunichiro Kittaka, Yuya Aoki, Toshiro Sakakibara, Akito Sakai, Satoru Nakatsuji, Yasumasa Tsutsumi, Masanori Ichioka, Kazushige Machida

摘要:

为了确定CeIrIn 5的间隙结构,我们通过在低至80 mK的低温下围绕c轴锥形旋转磁场H来测量场角分辨比热C(phi)。我们揭示了C(phi)具有四重角振动,其振幅随H倾斜出ab平面而单调减小.基于准经典Eilenberger方程的详细微观计算证实,通过假设dx 2-y2-波隙,可以唯一地解释所观察到的特征。这些结果表明CeIrIn_5是一种dx ~ 2-y ~ 2波超导体,并暗示了CeMIn_5(M = Co,Rh,Ir)中普遍的配对机制.

英文摘要:

In order to identify the gap structure of CeIrIn5, we measured field-angle-resolved specific heat C(phi) by conically rotating the magnetic field H around the c axis at low temperatures down to 80 mK. We revealed that C(phi) exhibits a fourfold angular oscillation, whose amplitude decreases monotonically by tilting H out of the ab plane. Detailed microscopic calculations based on the quasiclassical Eilenberger equation confirm that the observed features are uniquely explained by assuming the dx2-y2-wave gap. These results strongly indicate that CeIrIn5 is a dx2-y2-wave superconductor and suggest the universal pairing mechanism in CeMIn5 (M = Co, Rh, and Ir).

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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