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Creators/Authors contains: "Zhilyaeva, Elena I."

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  1. ; ; ; ; ; ; ; ( , Science Advances)
    Spins swaying collectively, inhomogeneously, and slowly, without ordering or freezing, emerge in an electric-dipole liquid. 
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  2. ; ; ; ; ; ; ; ; ; ; et al ( , Physical Review B)
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  3. ; ; ; ; ; ; ; ( , npj Quantum Materials)
    Abstract

    Strong electronic interactions can drive a system into a state with a symmetry breaking. Lattice frustration or competing interactions tend to prevent symmetry breaking, leading to quantum disordered phases. In spin systems frustration can produce a spin liquid state. Frustration of a charge degree of freedom also can result in various exotic states, however, experimental data on these effects is scarce. In this work we demonstrate how in a Mott insulator on a weakly anisotropic triangular lattice a charge ordered state melts on cooling down to low temperatures. Raman scattering spectroscopy finds that$$\kappa$$κ-(BEDT-TTF)$${}_{2}$$2Hg(SCN)$${}_{2}$$2Cl enters an insulating “dipole solid” state at$$T=30\,{\mathrm{K}}$$T=30K, but below$$T=15\,{\mathrm{K}}$$T=15Kthe order melts, while preserving the insulating energy gap. Based on these observations, we suggest a phase diagram relevant to other quantum paraelectric materials.

     
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  4. ; ; ; ; ; ; ; ( , Science)