Emergent superconductivity in an iron-based honeycomb lattice initiated by pressure-driven spin-crossover

被引：134

作者：

Wang, Yonggang ^{[1
,2
]}

Ying, Jianjun ^{[3
,4
]}

Zhou, Zhengyang ^{[5
,6
]}

Sun, Junliang ^{[5
]}

Wen, Ting ^{[1
]}

Zhou, Yannan ^{[7
]}

Li, Nana ^{[1
]}

Zhang, Qian ^{[1
]}

Han, Fei ^{[1
,2
]}

Xiao, Yuming ^{[4
]}

Chow, Paul ^{[4
]}

Yang, Wenge ^{[1
,2
]}

Struzhkin, Viktor V. ^{[3
]}

Zhao, Yusheng ^{[8
]}

Mao, Ho-Kwang ^{[1
,3
]}

机构：

[1] Ctr High Pressure Sci & Technol Adv Res HPSTAR, Beijing 100094, Peoples R China

[2] Carnegie Inst Sci, Geophys Lab, HPSynC, Argonne, IL 60439 USA

[3] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA

[4] Carnegie Inst Sci, Geophys Lab, HPCAT, Argonne, IL 60439 USA

[5] Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China

[6] Chongqing Univ, Coll Chem & Chem Engn, Chongqing 400044, Peoples R China

[7] Huanghe Sci & Technol Coll, Inst Nanostruct Funct Mat, Zhengzhou 450006, Henan, Peoples R China

[8] Southern Univ Sci & Technol, Shenzhen 518055, Peoples R China

来源：

NATURE COMMUNICATIONS | 2018年 / 9卷

基金：

中国国家自然科学基金;

关键词：

METAL TRANSITION; VOLUME COLLAPSE; DIFFRACTION; KELVIN; STATE;

D O I：

10.1038/s41467-018-04326-1

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The discovery of iron-based superconductors (FeSCs), with the highest transition temperature (T-c) up to 55 K, has attracted worldwide research efforts over the past ten years. So far, all these FeSCs structurally adopt FeSe-type layers with a square iron lattice and superconductivity can be generated by either chemical doping or external pressure. Herein, we report the observation of superconductivity in an iron-based honeycomb lattice via pressure-driven spin-crossover. Under compression, the layered FePX3 (X = S, Se) simultaneously undergo large in-plane lattice collapses, abrupt spin-crossovers, and insulator-metal transitions. Superconductivity emerges in FePSe3 along with the structural transition and vanishing of magnetic moment with a starting T-c similar to 2.5 K at 9.0 GPa and the maximum T-c similar to 5.5 K around 30 GPa. The discovery of superconductivity in iron-based honeycomb lattice provides a demonstration for the pursuit of transition-metal-based superconductors via pressure-driven spin-crossover.

引用

页数：7

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