Doping-dependent character and possible magnetic ordering of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>NdNiO</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
نویسندگان
چکیده
The novel nickelate superconductors of infinite-layer type feature challenging electronic pecularities in the normal-state phase diagram with doping. Distinct many-body behavior and different dispersion regimes entangled $\{$Ni-$d_{z^2}$, Ni-$d_{x^2-y^2}$$\}$ orbital sector give rise to highly rich physics, which is here studied for case NdNiO$_2$ system. An analysis based on advanced realistic dynamical mean-field theory unveils that superconducting hole-doped region meeting place a (self-)doped Mott insulator from underdoped side, bad Hund metal overdoped side. Fermi-level crossing Ni-$d_{z^2}$ flat-band ties both together form singular arena unconventional superconductivity. We furthermore shed light intriguing problem elusive magnetism nickelates. Antiferromagnetic (AFM) order small Ni moments shown be vital competitor at low temperature. At stoichiometry, C-AFM ferromagnetic spin-alignment along $c$-axis benefits conceivable coexistence Kondo(-lattice) screening.
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ژورنال
عنوان ژورنال: Physical Review Materials
سال: 2021
ISSN: ['2476-0455', '2475-9953']
DOI: https://doi.org/10.1103/physrevmaterials.5.044803