Publications related to Sublimation (phase transition)

Magnetic excitations near the quantum phase transition in the Ising ferromagnet LiHoF4

Henrik Moodysson Rønnow, Conradin Kraemer

Effective-medium theory and inelastic neutron scattering are used to study the magnetic excitations in the Ising ferromagnet LiHoF4 near its magnetic-field-induced quantum phase transition (QPT). As expected, the dominant mode softens at the QPT, but reach ...

AMERICAN PHYSICAL SOC2007

Development of a scanning near-field microscope and investigations of solid C60 luminescence

Jinquan Liu

This thesis presents the development of a scattering scanning near-field microscope (s-SNOM) and investigations on the photoluminescence study of solid C60. The first part concerns setting up of such a scattering SNOM where a tuning fork with an attached A ...

EPFL2007

Pressure-Induced Chemical Decomposition and Structural Changes of Boric Acid

Philip Pattison, Vladimir Dmitriev

A combined synchrotron X-ray diffraction, Raman scattering, and infrared spectroscopy study of the pressure-induced changes in H3BO3 to 10 GPa revealed a new high-pressure phase transition between 1 and 2 GPa followed by chemical decomposition into cubic H ...

2006

Two-dimensional tetramer-cuprate Na5RbCu4(AsO4)4Cl2: phase transitions and AFM order as seen by 87Rb NMR

Wendy Lee Queen

We report the 87Rb NMR results in a recently synthesized Na5RbCu4(AsO4)Cl2. This complex novel two-dimensional (2D) cuprate is an unique magnetic material, which contains layers of coupled Cu4O4 tetramers. In zero applied magnetic field, it orders antiferr ...

2006

Dynamics of the quantum dimer model on the triangular lattice: Soft modes and local resonating valence-bond correlations

Frédéric Mila, Dmitri Ivanov

We report on an exhaustive investigation of the dynamical dimer-dimer correlations in imaginary time for the quantum dimer model on the triangular lattice using the Green’s function Monte Carlo method. We show in particular that soft modes develop upon red ...

2006

Correlation between dielectric anisotropy and positive or zero transverse piezoelectric coefficients in perovskite ferroelectric single crystals

Nava Setter, Dragan Damjanovic, Matthew Davis

The transverse piezoelectric coefficient (d(31)(star)) has been calculated for tetragonal barium titanate (BT) and lead titanate (PT) cut along nonpolar axes, over a range of temperatures, using the phenomenological Landau-Ginzburg-Devonshire theory. It is ...

2005

Vacuum decay on a brane world

Sylvain Bréchet

The bubble nucleation rate for a first order phase transition occurring on a brane world is calculated. Both the Coleman-de Luccia thin wall instanton and the Hawking-Moss instanton are considered. The results are compared with the corresponding nucleation ...

American Physical Society2005

α-relaxation processes in binary hard-sphere mixtures

Giuseppe Foffi, Francesco Sciortino

Molecular-dynamics simulations are presented for two correlation functions formed with the partial density fluctuations of binary hard-sphere mixtures in order to explore the effects of mixing on the evolution of glassy dynamics upon compressing the liquid ...

2004

Star polymers: A study of the structural arrest in the presence of attractive interactions

Giuseppe Foffi

The structural arrest and the dynamics in star polymer solutions in the presence of attractive forces between microparticles were studied. The effect of the interplay between attractive interactions of different range and ultrasoft core repulsion, on the d ...

2004

Structural Arrest in Dense Star-Polymer Solutions

Giuseppe Foffi, Francesco Sciortino

The dynamics of star polymers is investigated via extensive molecular and Brownian dynamics simulations for a large range of functionality f and packing fraction

\eta

. The calculated isodiffusivity curves display both minima and maxima as a function of $ ...

2003

Sublimation (phase transition)

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Magnetic excitations near the quantum phase transition in the Ising ferromagnet LiHoF4

Development of a scanning near-field microscope and investigations of solid C60 luminescence

Pressure-Induced Chemical Decomposition and Structural Changes of Boric Acid

Two-dimensional tetramer-cuprate Na5RbCu4(AsO4)4Cl2: phase transitions and AFM order as seen by 87Rb NMR

Dynamics of the quantum dimer model on the triangular lattice: Soft modes and local resonating valence-bond correlations

Correlation between dielectric anisotropy and positive or zero transverse piezoelectric coefficients in perovskite ferroelectric single crystals

Vacuum decay on a brane world

α-relaxation processes in binary hard-sphere mixtures

Star polymers: A study of the structural arrest in the presence of attractive interactions

Structural Arrest in Dense Star-Polymer Solutions

Two-dimensional tetramer-cuprate Na5RbCu4(AsO4)4Cl2: phase transitions and AFM order as seen by 87Rb NMR

α-relaxation processes in binary hard-sphere mixtures

Correlation between dielectric anisotropy and positive or zero transverse piezoelectric coefficients in perovskite ferroelectric single crystals

Pressure-Induced Chemical Decomposition and Structural Changes of Boric Acid

Magnetic excitations near the quantum phase transition in the Ising ferromagnet LiHoF4

Development of a scanning near-field microscope and investigations of solid C60 luminescence

Dynamics of the quantum dimer model on the triangular lattice: Soft modes and local resonating valence-bond correlations

Vacuum decay on a brane world

Star polymers: A study of the structural arrest in the presence of attractive interactions

Structural Arrest in Dense Star-Polymer Solutions