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arXiv 1509.07772cond-mat.str-el
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单晶Sr2Ir1-xRuxO4(0 < x< 1)中从Jeff=1/2绝缘体到p波超导体

From Jeff=1/2 insulator to p-wave superconductor in single-crystal Sr2Ir1-xRuxO4 (0 < x< 1)

S. J. Yuan, S. Aswartham, J. Terzic, H. Zheng, H. D. Zhao, P. Schlottmann, G. Cao

摘要:

Sr_2IrO_4是一种强自旋轨道耦合的磁性绝缘体,而Sr_2RuO_4是一种p波超导体。对比的基态已被证明是由于在铱酸盐中的强SOC的关键作用。我们的结构,运输,和磁性的调查表明,取代4d Ru 4+(4d 4)离子的5d Ir 4+(5d 5)离子在Sr 2 IrO 4直接增加了空穴的t2 g带,减少SOC,从而重新平衡竞争的能量在单晶Sr 2 Ir 1-xRuxO 4。Ru掺杂驱动富相图的深刻影响是从扭曲的I41/acd到更理想的I4/mmm四元结构的结构相变,其在x=0.50附近伴随着从反铁磁绝缘状态到顺磁金属状态的相变。我们还与Rh掺杂Sr 2 IrO 4进行了比较,突出了重要的相似性和差异。

英文摘要:

Sr2IrO4 is a magnetic insulator assisted by strong spin-orbit coupling (SOC) whereas the Sr2RuO4 is a p-wave superconductor. The contrasting ground states have been shown to result from the critical role of the strong SOC in the iridate. Our investigation of structural, transport, and magnetic properties reveals that substituting 4d Ru4+ (4d4) ions for 5d Ir4+(5d5) ions in Sr2IrO4 directly adds holes to the t2g bands, reduces the SOC and thus rebalances the competing energies in single-crystal Sr2Ir1-xRuxO4. A profound effect of Ru doping driving a rich phase diagram is a structural phase transition from a distorted I41/acd to a more ideal I4/mmm tetragonal structure near x=0.50 that accompanies a phase transition from an antiferromagnetic-insulating state to a paramagnetic-metal state. We also make a comparison drawn with Rh doped Sr2IrO4, highlighting important similarities and differences.

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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