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

Nature Communications
Yonggang WangHo-Kwang Mao

Abstract

The discovery of iron-based superconductors (FeSCs), with the highest transition temperature (Tc) 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 Tc ~ 2.5 K at 9.0 GPa and the maximum Tc ~ 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.

References

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Citations

Sep 10, 2020·Journal of Computational Chemistry·Robert A Evarestov, Alexei Kuzmin
Nov 27, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·M J CoakJe-Geun Park
Feb 25, 2021·Physical Chemistry Chemical Physics : PCCP·Hanxing ZhangXianlong Wang
Jul 17, 2021·Physical Review Letters·Dylan DurkeeAshkan Salamat
Jul 7, 2021·The Journal of Physical Chemistry Letters·Zimin JiangYonggang Wang
Sep 5, 2019·Journal of the American Chemical Society·Weizhao CaiShanti Deemyad
Nov 30, 2018·Journal of the American Chemical Society·Ting WenHo-Kwang Mao
Sep 25, 2020·The Journal of Physical Chemistry Letters·Ting WenYonggang Wang

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Methods Mentioned

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Software Mentioned

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