Unconventional magnetism and electronic state in frustrated layered system PdCrO${}_2$

Abstract

First-principles calculations and a model consideration of magnetically frustrated layered material PdCrO${}_2$ are performed. The results on the exchange parameters are in agreement with the experimental data on the Curie-Weiss temperature ($\theta$). We show that experimentally observed strong suppression of the Néel temperature ($T_N$) in comparison with the Curie-Weiss temperature is due to three main factors. First, as expected, this is connected with the layered structure and relatively small exchange interaction along the $c$ axis. Second, deformation of the ideal in-plane 120${}^{\circ }$ magnetic structure is crucial to provide finite $T_N$ value. However, these two factors are still insufficient to explain low $T_N$ and the large frustration factor $|\theta |/T_N$. Thus, we suggest a scenario of an exotic non-Fermi-liquid state in PdCrO${}_2$ above $T_N$ within the frameworks of the Anderson lattice model, which seems to explain qualitatively all its main peculiarities.

References in corpus (22)

• Weak magnetism and non-Fermi liquids near heavy-fermion critical points
• CrO2: a self-doped double exchange ferromagnet
• Spin-waves in triangular lattice antiferromagnet: decays, spectrum renormalization, and singularities
• Frustration and the Kondo effect in heavy fermion materials
• Orbital physics in transition metal compounds: new trends
• Frustration and quantum criticality
• Standard model of the rare-earths, analyzed from the Hubbard I approximation
• On the self-consistent spin-wave theory of layered Heisenberg magnets
• Frustrated two dimensional quantum magnets
• Critical behavior of the metallic triangular-lattice Heisenberg antiferromagnet PdCrO2
• Unusual magnetism of layered chromium sulfides MCrS2 (M=Li, Na, K, Ag, and Au)
• Quantum phase transitions out of the heavy Fermi liquid
• Locallized Magnetism in Low-Dimensional Systems
• Magnetic order and spin fluctuations in low-dimensional insulating systems
• Scaling picture of magnetism formation in the anomalous f-systems: interplay of the Kondo effect and spin dynamics
• Magnetic structure of the conductive triangular-lattice antiferromagnet PdCrO2
• Critical behavior and the Neel temperature of quantum quasi-two-dimensional Heisenberg antiferromagnets
• Anomalous Magnetothermopower in a Metallic Frustrated Antiferromagnet
• Magnetic interactions in PdCrO${}_2$ and their effects on its magnetic structure
• Hidden Mott insulator in metallic PdCrO${}_2$
• Three dimensional magnetism and coupling to conduction electrons in PdCrO2
• Scaling theory of magnetism in frustrated Kondo lattices

Cited by in corpus (7)

• From basic properties to the Mott design of correlated delafossites
• Fingerprinting Triangular-Lattice Antiferromagnet by Excitation Gaps
• Magnetic and electronic ordering phenomena in the [Ru${}_2$O${}_6$] honeycomb lattice compound AgRuO${}_3$
• The Duel of Magnetic Interactions & Structural Instabilities: Itinerant Frustration in the Triangular Lattice Compound LiCrSe${}_2$
• Magnetic States and Electronic Properties of Manganese-Based Intermetallic Compounds Mn${}_2$YAl and Mn${}_3$Z (Y = V, Cr, Fe, Co, Ni; Z = Al, Ge, Sn, Si, Pt)
• Intermediate-scale theory for electrons coupled to frustrated local-moments
• Heisenberg spins on an anisotropic triangular lattice: PdCrO2 under uniaxial stress