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arXiv 2202.04071cond-mat.supr-con
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负化学压对Cu0- xZrxTe2超导电性和电荷密度波的影响

Negative Chemical Pressure Effect on Superconductivity and Charge Density Wave of Cu0.5Ir1-xZrxTe2

Lingyong Zeng, Yi Ji, Dongpeng Yu, Shu Guo, Yiyi He, Kuan Li, Yanhao Huang, Chao Zhang, Peifeng Yu, Shaojuan Luo, Huichao Wang, Huixia Luo

摘要:

本研究以Zr部分取代Ir作为负化学压,设计并合成了Cu_(0.5)Ir_(1-x)Zr_xTe_2体系。随着Zr的掺杂,晶胞参数显著扩大,意味着有效的负化学压。实验结果发现,电荷密度波(CDW)的顺序立即淬火微妙的Zr替代Ir和一个经典的圆顶形状的Tc(x),峰值在2.80 K的证据。最佳的Cu_(0.5)Ir_(0.95)Zr_(0.05)Te_2化合物是BCS型超导体,表现出II型超导特性。本研究表明,Cu0.5Ir1-xZrxTe 2体系可能为进一步理解过渡金属二硫属化合物的多电子序提供了一个新的平台.

英文摘要:

This study demonstrates the design and synthesis of Cu0.5Ir1-xZrxTe2 system by partial substitution of Ir with Zr acting as a negative chemical pressure. With the doping of Zr, the cell parameters significantly expand, signifying an effective negative chemical pressure. The experimental results found evidence that the charge density wave (CDW)-like order is immediately quenched by subtle Zr substitution for Ir and a classical dome-shape Tc(x) that peaked at 2.80 K can be observed. The optimal Cu0.5Ir0.95Zr0.05Te2 compound is a BCS-type superconductor and exhibits type-II SC. However, high Zr concentration can provoke disorder, inducing the reappearance of CDW order. The present study shows that the Cu0.5Ir1-xZrxTe2 system may provide a new platform for further understanding of multiple electronic orders in transition metal dichalcogenides.

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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