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Pressure-Induced Phase Transitions in Bilayer La$_3$Ni$_2$O$_7$

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arxiv 2410.18840 v1 pith:T3E7NOKT submitted 2024-10-24 cond-mat.mtrl-sci cond-mat.supr-con

Mingyu Xu , Greeshma C. Jose , Aya Rutherford , Haozhe Wang , Stephen Zhang , Robert J. Cava , Haidong Zhou , Wenli Bi
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Weiwei Xie
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classification cond-mat.mtrl-scicond-mat.supr-con
keywords phaseclassicaldouble-layeredpressuresunderadditionallyalternatingbilayer
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abstract

La$_3$Ni$_2$O$_7$ exists in two polymorphs: an unconventional structure with alternating layers of single- and triple-layered nickel-oxygen octahedra, and a classical double-layered Ruddlesden-Popper phase. In this study, we report the growth of single crystals of classical double-layered La$_3$Ni$_2$O$_7$ using the floating zone method. Structural characterization under pressures up to 15.4 GPa reveals a gradual transition from orthorhombic to tetragonal symmetry near 12 GPa. Additionally, we present pressure and field-dependent electrical resistance measurements under pressures as high as 27.4 GPa, from which we construct a phase diagram.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Origin of the Diagonal Double-Stripe Spin-Density-Wave and Potential Superconductivity in Bulk La$_3$Ni$_2$O$_{7}$ at Ambient Pressure

    cond-mat.supr-con 2024-12 conditional novelty 6.0 of 10

    An RPA analysis of an eight-band tight-binding model for ambient-pressure La3Ni2O7 reproduces the experimentally observed unidirectional diagonal double-stripe spin-density-wave and predicts enhanced pairing under hol...

  2. Spin-density wave and superconductivity in La$_4$Ni$_3$O$_{10}$ under ambient pressure

    cond-mat.supr-con 2024-11 conditional novelty 6.0 of 10

    In La4Ni3O10 at ambient pressure, a stripe spin-density wave with wave vector near (0.7π,0) is driven by Hund's coupling, and hole doping around δ=-0.4 is predicted to induce superconductivity.

  3. Low-temperature mean valence of nickel ions in pressurized La$_3$Ni$_2$O$_7$

    cond-mat.supr-con 2024-12 conditional novelty 4.0 of 10

    Nickel valence in La3Ni2O7 stays close to 2.5+ from ambient pressure to 40 GPa at 20 K, so pressure-induced superconductivity is tied to a structural transition rather than a change in nickel charge.

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