Microscopic theory of superconducting phase diagram in infinite-layer nickelates
نویسندگان
چکیده
Since the discovery of superconductivity in infinite-layer nickelates ${\mathrm{RNiO}}_{2}$ (R = La, Pr, Nd), great research efforts have been made to unveil its underlying superconducting mechanism. However, physical origin intriguing hole-doped phase diagram, characterized by a dome sandwiched between two weak insulators, is still unclear. Here we present microscopic theory for electronic structure from fundamental model-based perspective. We found that appearance insulator lightly and heavily regime dominated Mottness Hundness, respectively, exhibiting unique orbital-selective doping originated competition Hund interaction crystal field splitting. Moreover, can also be created ``mixed'' transition Mott-insulator Hund-induced correlated state, exactly reproducing experimentally observed diagram. Our findings not only demonstrate orbital-dependent strong-correlation physics Ni $3d$ states but provide unified understanding diagram nickelates, which are distinct well-established paradigms cuprates iron pnictides.
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ژورنال
عنوان ژورنال: Physical review
سال: 2022
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevb.106.035111