Electron-lattice coupling and the broken symmetries of the molecular salt (TMTTF)${}_2$SbF${}_6$

Abstract

(TMTTF)${}_2$SbF${}_6$ is known to undergo a charge ordering (CO) phase transition at $T_{CO}\approx 156K$ and another transition to an antiferromagnetic (AF) state at $T_N\approx 8K$. Applied pressure $P$ causes a decrease in both $T_{CO}$ and $T_N$. When $P>0.5GPa$, the CO is largely supressed, and there is no remaining signature of AF order. Instead, the ground state is a singlet. In addition to establishing an expanded, general phase diagram for the physics of TMTTF salts, we establish the role of electron-lattice coupling in determining how the system evolves with pressure.

4 pages, 5 figures

References in corpus (10)

• Charge ordering in the TMTTF family of molecular conductors
• The ferroelectric Mott-Hubbard phase of organic (TMTTF)2X conductors
• Antiferromagnetic Phases of One-Dimensional Quarter-Filled Organic Conductors
• Competition and coexistence of bond and charge orders in (TMTTF)2AsF6
• Theory of Coexisting Charge and Spin-Density Waves in (TMTTF)_2Br, (TMTSF)_2PF_6 and alpha-(BEDT-TTF)_2MHg(SCN)_4
• Bond and charge density waves in the isotropic interacting two-dimensional quarter-filled band and the insulating state proximate to organic superconductivity
• Influence of the anion potential on the charge ordering in quasi-one dimensional charge transfer salts
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• Influence of Charge Order on the Ground States of TMTTF Molecular Salts

Cited by in corpus (26)

• Theoretical Aspects of Charge Ordering in Molecular Conductors
• Absence of charge order in the dimerized κ-phase BEDT-TTF salts
• Ordering phenomena in quasi one-dimensional organic conductors
• Evidence for Lattice Effects at the Charge-Ordering Transition in (TMTTF)${}_2$X
• From charge- and spin-ordering to superconductivity in the organic charge-transfer solids
• Charge order and antiferromagnetism in the extended Hubbard model
• Dielectric Spectroscopy on Organic Charge-Transfer Salts
• Tuning the magnetic dimensionality by charge ordering in the molecular TMTTF salts
• Electronic properties of Fabre charge-transfer salts under various temperature and pressure conditions
• Finite-Temperature Phase Diagram of Quasi-One-Dimensional Molecular Conductors: Quantum Monte Carlo Study
• Temperature-driven transition from the Wigner Crystal to the Bond-Charge-Density Wave in the Quasi-One-Dimensional Quarter-Filled band
• Charge-Ordering Transition in (TMTTF)${}_2$X Explored via Dilatometry
• Charge-Ordered State versus Dimer-Mott Insulator at Finite Temperatures
• 13C NMR study of the magnetic properties of the quasi-one-dimensional conductor, (TMTTF)2SbF6
• Exploring the Charge-Ordering Transition in (TMTTF)${}_2$X via Thermal Expansion Measurements
• Probing the Ionic Dielectric Constant Contribution in the Ferroelectric Phase of the Fabre-Salts
• Spin frustration, charge ordering, and enhanced antiferromagnetism in TMTTF${}_2$SbF${}_6$
• Phase competitions and coexistences in quasi-one-dimensional molecular conductors: exact diagonalization study
• High pressure x-ray study of spin-Peierls physics in the quantum spin chain material TiOCl
• Phase diagram of quarter-filled band organic salts, [EDT-TTF-CONMe2]2X, X = AsF6 and Br
• Comment on "Tuning the Magnetic Dimensionality by Charge Ordering in the Molecular TMTTF Salts"
• Combined X-ray diffraction, electrical resistivity, and $ab$ $initio$ study of (TMTTF)${}_2$PF${}_6$ under pressure: implications to the unified phase diagram
• From valence bond solid to unconventional superconductivity in the organic charge-transfer solids
• Finite-temperature phase transitions in quasi-one-dimensional molecular conductors
• Charge- and anion-orderings in the quasi-one-dimensional organic conductor (TMTTF)${}_2$NO${}_3$
• Stability of correlated insulating states in molecular conductors from first-principles calculation