scholarly journals Structural, magnetic, and insulator-to-metal transitions under pressure in the GaV4S8 Mott insulator: A rich phase diagram up to 14.7 GPa

2019 ◽  
Vol 100 (24) ◽  
Author(s):  
J. Mokdad ◽  
G. Knebel ◽  
C. Marin ◽  
J.-P. Brison ◽  
V. Ta Phuoc ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Mott Insulator ◽  
Rich Phase

TEM Characterization of Pseudotetragonal Mullite

2001 ◽  
Vol 7 (S2) ◽  
pp. 426-427
Author(s):  
Bradley R. Johnson ◽  
Waltraud M. Kriven
Keyword(s):  
Phase Diagram ◽  
Spatial Relationship ◽  
Equilibrium Structure ◽  
Lattice Parameters ◽  
Orthorhombic Structure ◽  
Containerless Processing ◽  
Rich Phase ◽  
Tem Characterization ◽  
Solution Field

Mullite (3Al2O3•2SiO2) exists in a solid solution field (∼57-63 mol% Al2O3) as the only stable compound in the Al2O3•SiO2 phase diagram at ambient pressures. Equilibrium 3:2 mullite has an orthorhombic structure with b>a (o-mullite). However, when initially crystallized from molecularly mixed, 3:2 precursors at temperatures < 1200°C, the first phase that forms has lattice parameters with a ≈b. This structure is often termed pseudotetragonal mullite (pt-mullite), since even when the ‘a’ and ‘b’ lattice parameters are identical, they are symmetrically independent. Pseudotetragonal mullite has been shown to contain approx. 70 mol% Al2O3. with increasing time and temperature, the structure gradually assimilates the residual SiO2, and the lattice parameters change, such that by 1400°C, the material has attained its equilibrium structure and composition.TEM was used to determine the spatial relationship between the crystalline phase and the residual, amorphous, SiO2-rich phase in pt-mullite. The starting materials were quenched, 3:2 mullite beads and fibers (made by containerless processing).

scholarly journals SUPERCONDUCTING PHASE TRANSITION IN THE NAMBU–JONA-LASINIO MODEL

2001 ◽  
Vol 16 (17) ◽  
pp. 1129-1138 ◽  
Author(s):  
M. SADZIKOWSKI
Keyword(s):  
Phase Transition ◽  
Phase Diagram ◽  
Phase Transitions ◽  
Superconducting Phase ◽  
Coupling Constants ◽  
Coupling Constant ◽  
Rich Phase ◽  
Quark Interaction ◽  
Quark Coupling ◽  
Superconducting Phase Transition

The Nambu–Bogoliubov–de Gennes method is applied to the problem of superconducting QCD. The effective quark–quark interaction is described within the framework of the Nambu–Jona-Lasinio model. The details of the phase diagram are given as a function of the strength of the quark–quark coupling constant G′. It is found that there is no superconducting phase transition when one uses the relation between the coupling constants G′ and G of the Nambu–Jona-Lasinio model which follows from the Fierz transformation. However, for other values of G′ one can find a rich phase structure containing both the chiral and the superconducting phase transitions.

scholarly journals Phase diagram of hard-core bosons on clean and disordered two-leg ladders: Mott insulator–Luttinger liquid–Bose glass

2011 ◽  
Vol 84 (5) ◽  
Author(s):  
François Crépin ◽  
Nicolas Laflorencie ◽  
Guillaume Roux ◽  
Pascal Simon
Keyword(s):  
Phase Diagram ◽  
Luttinger Liquid ◽  
Hard Core ◽  
Mott Insulator ◽  
Bose Glass

FRACTAL AND DYNAMICAL PROPERTIES OF THE KICKED HARPER MODEL

1994 ◽  
Vol 08 (03) ◽  
pp. 207-235 ◽  
Author(s):  
R. ARTUSO ◽  
G. CASATI ◽  
F. BORGONOVI ◽  
L. REBUZZINI ◽  
I. GUARNERI
Keyword(s):  
Magnetic Field ◽  
State Physics ◽  
Phase Diagram ◽  
Quantum Chaos ◽  
Multifractal Analysis ◽  
Model System ◽  
Magnetic Field Effects ◽  
Solid State Physics ◽  
Rich Phase ◽  
Dynamical Properties

We review recent work on the so-called kicked Harper model, which can be viewed either as a model system in the framework of quantum chaos, or as a pulsed version of the Harper model, which has been thoroughly investigated in the context of magnetic field effects in solid state physics. In particular we describe its rich phase diagram, by means of both dynamical methods and multifractal analysis of the spectrum.

scholarly journals Two-dimensional ground-state mapping of a Mott-Hubbard system in a flexible field-effect device

2019 ◽  
Vol 5 (5) ◽  
pp. eaav7282 ◽  
Author(s):  
Yoshitaka Kawasugi ◽  
Kazuhiro Seki ◽  
Satoshi Tajima ◽  
Jiang Pu ◽  
Taishi Takenobu ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Ground State ◽  
Field Effect ◽  
Mott Insulator ◽  
Two Dimensional ◽  
Superconducting Transition ◽  
Microscopic Mechanism ◽  
One Dimensional ◽  
First Order ◽  
Insulating Phase

A Mott insulator sometimes induces unconventional superconductivity in its neighbors when doped and/or pressurized. Because the phase diagram should be strongly related to the microscopic mechanism of the superconductivity, it is important to obtain the global phase diagram surrounding the Mott insulating state. However, the parameter available for controlling the ground state of most Mott insulating materials is one-dimensional owing to technical limitations. Here, we present a two-dimensional ground-state mapping for a Mott insulator using an organic field-effect device by simultaneously tuning the bandwidth and bandfilling. The observed phase diagram showed many unexpected features such as an abrupt first-order superconducting transition under electron doping, a recurrent insulating phase in the heavily electron-doped region, and a nearly constant superconducting transition temperature in a wide parameter range. These results are expected to contribute toward elucidating one of the standard solutions for the Mott-Hubbard model.

Electric Quadrupole Orders in f-Electron Systems on the fcc Lattice

2021 ◽  
Vol 1 ◽  
Keyword(s):  
Phase Diagram ◽  
Heavy Fermion ◽  
Electric Quadrupole ◽  
Electron Systems ◽  
Rich Phase ◽  
Partially Ordered ◽  
Fcc Lattice ◽  
Ordered Phases ◽  
Heavy Fermion Materials

We theoretically showed that electric quadrupoles in some heavy fermion materials exhibit a very rich phase diagram including unique partially-ordered phases stabilized by an interaction specific to these systems.

scholarly journals Critical Casimir Forces and Colloidal Phase Transitions in a Near-Critical Solvent: A Simple Model Reveals a Rich Phase Diagram

2015 ◽  
Vol 114 (3) ◽  
Author(s):  
John R. Edison ◽  
Nikos Tasios ◽  
Simone Belli ◽  
Robert Evans ◽  
René van Roij ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Phase Transitions ◽  
Simple Model ◽  
Casimir Forces ◽  
Rich Phase

scholarly journals Phase Diagram of a Lattice Model for Ternary Mixtures of Water, Oil, and Surfactants

1991 ◽  
Vol 248 ◽  
Author(s):  
Mohamed Laradji ◽  
Hong Guo ◽  
Martin Grant ◽  
Martin J. Zuchkermann
Keyword(s):  
Phase Diagram ◽  
Monte Carlo ◽  
Phase Behavior ◽  
Lattice Model ◽  
Large Scale ◽  
Ternary Mixtures ◽  
Rich Phase ◽  
Component System ◽  
Chemical Potentials ◽  
Wide Range

AbstractLarge scale Monte-Carlo simulations have been performed on a lattice model for a three component system of water, oil, and surfactants to obtain the phase equilibria and scattering behavior for a wide range of temperatures and chemical potentials. We observed that this model has a rich phase behavior, namely a water-oil phase coexistence, a microemulsion phase, a lamellar phase, and a square phase. This phase diagram is consistent with experiments, and is in qualitative agreement with a model of Gompper and Schick [ Phys. Rev. Lett. 62, 1647 (1989)].

scholarly journals Specific heat ofCe1−xLaxRhIn5in zero and applied magnetic field: A rich phase diagram

2002 ◽  
Vol 66 (13) ◽  
Author(s):  
J. S. Kim ◽  
J. Alwood ◽  
D. Mixson ◽  
P. Watts ◽  
G. R. Stewart
Keyword(s):  
Magnetic Field ◽  
Phase Diagram ◽  
Specific Heat ◽  
Applied Magnetic Field ◽  
Rich Phase

scholarly journals New Verbeekite-type polymorphic phase and rich phase diagram in the PdSe2−xTex system

2021 ◽  
Vol 104 (2) ◽  
Author(s):  
Wenhao Liu ◽  
Mehrdad Rostami Osanloo ◽  
Xiqu Wang ◽  
Sheng Li ◽  
Nikhil Dhale ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Rich Phase
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