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Intertwined Density Waves in a Metallic Nickelate



Junjie Zhang, D. Phelan, A. S. Botana, Yu-Sheng Chen, Hong Zheng, M. Krogstad, Suyin G. Wang, Yiming Qiu, Jose Rodriguez Rivera, R. Osborn, S. Rosenkranz, M. R. Norman, J. F. Mitchell


Nickelates are a rich class of materials, ranging from insulating magnets to superconductors. But for stoichiometric materials, insulating behavior is the norm, as for most late transition metal oxides. Notable exceptions are the 3D perovskite LaNiO3, an unconventional paramagnetic metal, and the layered Ruddlesden-Popper phases R4Ni3O10, (R=La, Pr, Nd). The latter are particularly intriguing because they exhibit an unusual metal-to-metal transition. Here, we demonstrate that this transition results from an incommensurate density wave with both charge and magnetic character that lies intermediate in behavior between the metallic density wave seen in chromium metal and the insulating stripes typically found in layered nickelates. As such, R4Ni3O10, which appears to be the first known example of an itinerant spin density wave in a 3d transition metal oxide, represents an important bridge between the paramagnetism of 3D metallic LaNiO3 at higher nickel valence and the polaronic behavior of quasi-2D Rd2-xSrxNiO4 at lower nickel valence.
Nature Materials


nickelate, density wave


Zhang, J. , Phelan, D. , Botana, A. , Chen, Y. , Zheng, H. , Krogstad, M. , Wang, S. , Qiu, Y. , Rodriguez Rivera, J. , Osborn, R. , Rosenkranz, S. , Norman, M. and Mitchell, J. (2020), Intertwined Density Waves in a Metallic Nickelate, Nature Materials (Accessed June 22, 2024)


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Created November 25, 2020, Updated October 1, 2021