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arXiv 1002.1304cond-mat.supr-concond-mat.str-el
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用de Haas-van Alphen效应研究超导体BaFe PDMATHAAB(As $_{1-x}$ P $_x$)$_2$中费米面嵌套的增强

Enhanced Fermi surface nesting in superconducting BaFe$_2$(As$_{1-x}$P$_x$)$_2$ revealed by de Haas-van Alphen effect

J. G. Analytis, J. -H. Chu, R. D. McDonald, S. C. Riggs, I. R. Fisher

摘要:

本文用de Haas-van Alphen效应(dHvA)测量了BaFe_2(As_0.37} P_0.63)_2(T_c= 9 K)的三维费米面形貌。内层电子袋的面积和kz面间翘曲与空穴袋相似,表明费米面在(π,π)方向上几何嵌套良好。这些结果与非超导磷化物(x=1)的费米学形成鲜明对比,因此表明嵌套在磷属元素化物超导性中的重要作用。

英文摘要:

The three-dimensional Fermi surface morphology of superconducting BaFe_2(As_0.37}P_0.63)_2 with T_c=9K, is determined using the de Haas-van Alphen effect (dHvA). The inner electron pocket has a similar area and k_z interplane warping to the observed hole pocket, revealing that the Fermi surfaces are geometrically well nested in the (π,π) direction. These results are in stark contrast to the Fermiology of the non-superconducting phosphides (x=1), and therefore suggests an important role for nesting in pnictide superconductivity.

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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