The phase diagram of ultra quantum liquids

Quantum Phase Transitions in 2d Quantum Liquids∗

Phase diagram of patchy colloids: towards empty liquids.

We report theoretical and numerical evaluations of the phase diagram for patchy colloidal particles of new generation. We show that the reduction of the number of bonded nearest neighbors offers the possibility of generating liquid states (i.e., states with temperature T lower than the liquid-gas critical temperature) with a vanishing occupied packing fraction (phi), a case which can not be rea...

Phase diagram of a quantum Coulomb wire

We report the quantum phase diagram of a one-dimensional Coulomb wire obtained using the path integral Monte Carlo (PIMC) method. The exact knowledge of the nodal points of this system permits us to find the energy in an exact way, solving the sign problem which spoils fermionic calculations in higher dimensions. The results obtained allow for the determination of the stability domain, in terms...

Ionic liquids: phase diagram characterisation with combined SAXS-WAXS

1-alkyl-3-methyl-imidazolium (Cn-mim) salts are examples of ionic liquids (ILs).[1] In these salts, the cation is a bulky organic molecule: accordingly, due to factors such as the hindered ion packing and low charge density, the melting point is relatively low compared with conventional inorganic salts. As a consequence, it is possible to synthesise ILs which are liquid at room temperature. The...

Quantum criticality and the phase diagram of the cuprates

I discuss a proposed phase diagram of the cuprate superconductors as a function of temperature, carrier concentration, and a strong magnetic field perpendicular to the layers. I show how the phase diagram gives a unified interpretation of a number of recent experiments. Keynote talk, 9th International Conference on Materials and Mechanisms of Superconductivity, Tokyo, Sep 7-12, 2009.