Variation of carrier density in semimetals via short-range correlation: A case study with nickelate NdNiO${}_2$

Abstract

Carrier density is one of the key controlling factors of material properties, particularly in controlling the essential correlations in strongly correlated materials. Typically, carrier density is externally tuned by doping or gating and remains fixed below room temperature. Strangely, the carrier density in correlated semimetals is often found to vary sensitively against weak external controls such as temperature, magnetic field, and pressure. Here, we develop a realistic simulation scheme that incorporates interatomic noncollinear magnetic correlation without a long-range order. Using the recently discovered nickelate superconductor as an example, we demonstrate a rather generic low-energy mechanism that in semimetals short-range correlation can reversely modulate the carrier density as well. Such a mutual influence between correlation and carrier density provides an extra ingredient for sensitive bifurcating behavior. This special feature of correlated semimetals explains their versatile carrier density at low energy and opens up new possibilities of functionalizing these materials.

References in corpus (7)

• Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
• Quantum Monte Carlo Impurity Solver for Cluster DMFT and Electronic Structure Calculations in Adjustable Base
• Unfolding first-principles band structures
• Self-doped Mott insulator for parent compounds of nickelate superconductors
• Pressure-induced monotonic enhancement of Tc to over 30 K in the superconducting Pr0.82Sr0.18NiO2 thin films
• Role of $4f$ states in infinite-layer NdNiO${}_2$
• Fluctuation-frustrated flat band instabilities in NdNiO2

Cited by in corpus (6)

• Pressure Driven Fractionalization of Ionic Spins Results in Cupratelike High-$T_c$ Superconductivity in La${}_3$Ni${}_2$O${}_7$
• Cuprate-like Electronic Structures in Infinite-Layer Nickelates with Substantial Hole Dopings
• Charge ordering as the driving mechanism for superconductivity in rare-earth nickel oxides
• Observation of Electride-like $s$ States Coexisting with Correlated $d$ Electrons in NdNiO${}_2$
• Magnetism-Enhanced Strong Electron-Phonon Coupling in Infinite-Layer Nickelate
• Effective Ionic Valence and Local Magnetic Moment in Kagome Superconductors