Three-dimensional electronic instabilities in polymerized solid A1C60

Abstract

The low-temperature structure of A1C60 (A=K, Rb) is an ordered array of polymerized C60 chains, with magnetic properties that suggest a non-metallic ground state. We study the paramagnetic state of this phase using first-principles electronic-structure methods, and examine the magnetic fluctuations around this state using a model Hamiltonian. The electronic and magnetic properties of even this polymerized phase remain strongly three dimensional, and the magnetic fluctuations favor an unusual three-dimensional antiferromagnetically ordered structure with a semi-metallic electronic spectrum.

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References in corpus (2)

• Metal-Insulator Transitions in Degenerate Hubbard Models and A${}_x$C${}_{60}$
• Tight-Binding Parametrization of First-Principles Electronic Dispersion in Orientationally Disordered A3c60

Cited by in corpus (12)

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• A Survey of the Van Hove Scenario for High-T_c Superconductivity With Special Emphasis on Pseudogaps and Striped Phases
• Evidence for distinct polymer chain orientations in KC60 and RbC60
• Superconductivity in a spin liquid - a one dimensional example
• Metal-Insulator Transition in C60-Polymers
• The polymer phase of the TDAE-C${}_{60}$ organic ferromagnet
• Evidence of a structural anomaly at 14 K in polymerised CsC60
• Theory of Distinct Crystal Structures of Polymerized Fullerides AC60, A=K, Rb, Cs: the Specific Role of Alkalis
• Crystal Structures of Polymerized Fullerides AC60, A=K, Rb, Cs and Alkali-mediated Interactions
• Doping Effects and Electronic States in C60-Polymers
• Commensurate and modulated magnetic phases in orthorhombic A1C60
• Anomalous metallicity and electronic phase separation in the CsC60 polymerized fulleride