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Jianjun Ying

As seen in: Nature, Physical Review B
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Articles

Unconventional density-wave state in Ruddlesden‒Popper nickelate La 4 Ni 3 O 10

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By Yu Wang, Dan Zhao, Enkang Zhang, Lixing Chen, Yanbing Zhou, Mengzhu Shi, Yinghao Zhu, Jianjun Ying, Jun Zhao, Tao Wu
| Nature Verified
Abstract The recent discovery of superconductivity in Ruddlesden‒Popper (RP) nickelates Rn+1NinO3n+1 (R = rare earth) under high pressure provides a new platform to understand the underlying physics of high-temperature superconductivity. Previous transport measurements suggest a notable correlation between pressure-induced high-temperature superconductivity and a density-wave (DW) state.
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Spin density wave rather than tetragonal structure is prerequisite for superconductivity in La3Ni2O7-δ - Nature Communications

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By Mengzhu Shi, Di Peng, Binghui Ge, Zhidan Zeng, Qiaoshi Zeng, Jianjun Ying, Tao Wu
| Nature Verified
Abstract The pressure-induced high-temperature (Tc) superconductivity in nickelates La3Ni2O7-δ has sparked significant interest to explore its superconductivity at ambient pressure. Whether the pressure-stabilized tetragonal structure is a prerequisite for achieving nickelate superconductivity at ambient pressure is under hot debate.
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Pressure induced superconductivity in hybrid Ruddlesden‒Popper La5Ni3O11 single crystals - Nature Physics

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By Mengzhu Shi, Di Peng, Binghui Ge, Zhidan Zeng, Qiaoshi Zeng, Jianjun Ying, Tao Wu
| Nature Verified
Abstract The discovery of high-temperature superconductivity under high pressure in Ruddlesden–Popper phase nickelates has captured notable attention in the condensed matter physics community. Here we report superconductivity in a distinct hybrid nickelate, La5Ni3O11, formed by alternating stacks of La3Ni2O7 and La2NiO4 layers. This nickelate also exhibits a density-wave transition at approximately 170 K near ambient pressure.
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