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

Mingyu Xu; Greeshma C. Jose; Aya Rutherford; Haozhe Wang; Stephen Zhang; Robert J. Cava; Haidong Zhou; Wenli Bi; Weiwei Xie

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

Materials Science 2024-10-25 v1 Superconductivity

Authors: Mingyu Xu , Greeshma C. Jose , Aya Rutherford , Haozhe Wang , Stephen Zhang , Robert J. Cava , Haidong Zhou , Wenli Bi , Weiwei Xie

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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.

Keywords

pressure-induced phase transition bilayer La$_3$Ni$_2$O$_7$ structural phase transition resistivity

Cite

@article{arxiv.2410.18840,
  title  = {Pressure-Induced Phase Transitions in Bilayer La$_3$Ni$_2$O$_7$},
  author = {Mingyu Xu and Greeshma C. Jose and Aya Rutherford and Haozhe Wang and Stephen Zhang and Robert J. Cava and Haidong Zhou and Wenli Bi and Weiwei Xie},
  journal= {arXiv preprint arXiv:2410.18840},
  year   = {2024}
}

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13+5 pages, 4+2 figures

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

Abstract

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