Single-component molecular material hosting antiferromagnetic and spin-gapped Mott subsystems

Abstract

We investigated a system based solely on a single molecular species, Cu(tmdt)${}_2$, accommodating $d$ and $\pi$ orbitals within the molecule. ${}^{13}$C nuclear magnetic resonance measurements captured singlet-triplet excitations of $\pi$ spins indicating the existence of a $\pi$-electron-based spin-gapped Mott insulating subsystem, which has been hidden by the large magnetic susceptibility exhibited by the $d$ spins forming antiferromagnetic chains. The present results demonstrate a unique hybrid Mott insulator composed of antiferromagnetic and spin-singlet Mott subsystems with distinctive dimensionalities.

23 pages, 7 figures (including Supplemental Material)

References in corpus (24)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• Charge Ordering in Organic ET Compounds
• Orbital-selective Mott transitions in the degenerate Hubbard model
• Orbital-Selective Mott transition out of band degeneracy lifting
• Orbital selective Mott transition in multi-band systems: slave-spin representation and dynamical mean-field theory
• Observation of Temperature-Induced Crossover to an Orbital-Selective Mott Phase in A${}_x$Fe${}_{2-y}$Se${}_2$ (A=K, Rb) Superconductors
• Kondo Breakdown as a Selective Mott Transition in the Anderson Lattice
• Charge-cluster glass in an organic conductor
• Novel Mott Transitions in Non-Isotropic Two-Band Hubbard Model
• Dynamical behavior across the Mott transition of two bands with different bandwidths
• NMR relaxation in half-integer antiferromagnetic spin chains
• Is the Mott transition relevant to f-electron metals ?
• T=0 heavy fermion quantum critical point as an orbital selective Mott transition
• Single-Component Molecular Metals as Multiband π-d Systems
• NMR relaxation rates in spin-1/2 antiferromagnetic chains
• Tuning a Strain-Induced Orbital Selective Mott Transition in Epitaxial VO${}_2$
• Complete phase diagram for three-band Hubbard model with orbital degeneracy lifted by crystal field splitting
• A General Mechanism for Orbital Selective Phase Transitions
• NMR Evidence for Antiferromagnetic Transition in the Single-Component Molecular Conductor, [Au(tmdt)_{2}] at 110 K
• Superconductivity emerging from an electronic phase separation in the charge ordered phase of RbFe${}_2$As${}_2$
• Electronic States of Single-Component Molecular Conductors [M(tmdt)2]
• Orbital selective phase transition induced by different magnetic states: A dynamical cluster approximation study
• Electronic states and molecular dynamics of single-component molecular conductors [M(tmdt)${}_2$] (M=Ni, Pt) studied by ${}^{13}$C and ${}^1$H NMR
• NMR Evidence for Antiferromagnetic Transition in the Single-Component Molecular System, [Cu(tmdt)${}_2$]

Cited by in corpus (1)

• A spin-gapped Mott insulator with the dimeric arrangement of twisted molecules Zn(tmdt)${}_2$