Year: 2020
Type: article
Abstract: Motivated by analyses of the reported electrical resistivity and Hall coefficient data in the normal state, the authors propose that the parent compound of the newly discovered superconducting nickelate Nd${}_{1\ensuremath{-}x}$Sr${}_{x}$NiO${}_{2}$ is a self-doped Mott insulator, in which the low-density Nd $5d$ conduction electrons couple to localized Ni 3${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$ electrons to form Kondo spin singlets at low temperature. The antiferromagnetic long-range order is suppressed and an insulator-metal transition results.
Authors: Guang-Ming Zhang, Yi-feng Yang, Fu-Chun Zhang
Institutions: State Key Laboratory of Low-Dimensional Quantum Physics, Frontier Science Center for Quantum Information of the Ministry of Education of China, Tsinghua University, Chinese Academy of Sciences, Songshan Lake Materials Laboratory, Institute of Physics, University of Chinese Academy of Sciences, Kavli Institute for Theoretical Sciences
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2977075310