A High-pressure Investigation of the Synthetic Analogue of Chalcomenite, CuSeO3∙2H2O

**phase**

**transition**at 4.5(2) GPa and by the first-principles computing simulations. Expand abstract.

**phase**undergoes an isostructural

**phase**

**transition**at 4.0(5) GPa with the thermodynamic character being first-order. This conclusion is supported by Raman spectroscopy studies which have detected the

**phase**

**transition**at 4.5(2) GPa and by the first-principles computing simulations. The structure solution at different pressures has provided information on the change with pressure of unit-cell parameters as well as on the bond and polyhedral compressibility. A Birch-Murnaghan equation of state has been fitted to the unit-cell volume data. We found that chalcomenite is highly compressible with a bulk modulus of 42 – 49 GPa. The possible mechanism driving changes in the crystal structure is discussed, being the behavior of CuSeO3∙2H2O mainly dominated by the large compressibility of the coordination polyhedron of Cu. On top of that, an assignation of Raman modes is proposed based upon density-functional theory and the pressure dependence of Raman modes discussed. Finally, the pressure dependence of phonon frequencies is also reported.

5/10 relevant

Preprints.org

Quantum **Phase** **Transitions** of the Distorted Diamond Spin Chain

**phases**; the ferrimagnetic

**phase**, the spin gap one, and the gapless Tomonaga-Luttinger liquid depending on the exchange coupling parameters. Expand abstract.

**phase**diagram is presented.

7/10 relevant

arXiv

Shear Banding, Intermittency, Jamming and Dynamic **Phases** for Skyrmions
in Inhomogeneous Pinning Arrays

**transitions**into a moving crystal

**phase**. Expand abstract.

**transition**occurs to a

**phase**in which motion also appears within the pinned region, creating a shear band in the skyrmion velocity, while the skyrmion Hall angle is still zero. As the drive increases further, the flow becomes disordered and the skyrmion Hall angle increases with drive until saturating at the highest drives when the system

**transitions**into a moving crystal

**phase**. The different dynamic

**phases**are associated with velocity and density gradients across the pinning boundaries. We map out the dynamic

**phases**as a function of pinning strength, skyrmion density, and Magnus force strength, and correlate the

**phase**boundaries with features in the velocity-force curves and changes in the local and global ordering of the skyrmion structure. For large Magnus forces, the shear banding instability is replaced by large scale intermittent flow in the pinned region accompanied by simultaneous motion perpendicular to the direction of the drive, which appears as oscillations in the transport curves. We also examine the case of a drive applied perpendicular to the strip, where we find a jamming effect in which the skyrmion flow is blocked by skyrmion-skyrmion interactions until the drive is large enough to induce plastic flow.

4/10 relevant

arXiv

Bandwidth-tuning from insulating Mott quantum spin liquid to Fermi liquid via chemical substitution in $\kappa$-[(BEDT-TTF)$_{1-x}$(BEDT-STF)$_x$]$_2$Cu$_2$(CN)$_3$

**phase**

**transition**, metallic regions coexist in the insulating matrix leading to pronounced percolative effects most obvious in a strong enhancement of the dielectric constant at low temperatures. Expand abstract.

**phase**

**transition**by reducing electronic correlations U/W. Here we introduce an alternative path by increasing the molecular orbitals when partially replacing sulfur by selenium in the constituting bis-(ethylenedithio)-tetrathiafulvalene (BEDT-TTF) molecules of the title compound. We characterize the tuning of the insulating quantum spin liquid state via a Mott

**transition**to the metallic Fermi-liquid state by transport, dielectric, and optical measurements. At this first-order

**phase**transition, metallic regions coexist in the insulating matrix leading to pronounced percolative effects most obvious in a strong enhancement of the dielectric constant at low temperatures.

4/10 relevant

arXiv

Strong First Order Electroweak **Phase** **Transition** in Gauge-Higgs
Unification at Finite Temperature

**phase**

**transition**at finite temperature in a model of gauge-Higgs unification where the fermion mass hierarchy including top quark mass, a viable electroweak symmetry breaking and an observed Higgs mass are successfully reproduced. To study the

**phase**transition, we derive the general formula of the 1-loop effective potential at finite temperature by using the $\zeta$ function regularization method. It is remarkable that the functions determining the Kaluza-Klein mass spectrum have only to be necessary in calculations. This potential can be applicable to any higher dimensional theory in flat space where one extra spatial dimension is compactified. Applying to our model of gauge-Higgs unification, the strong first

**phase**

**transition**compatible with 125 GeV Higgs mass is found to happen.

10/10 relevant

arXiv

Partial-Symmetry-Breaking **Phase** **Transitions**

**phase**

**transitions**in theories with large rank symmetry group that exhibit specific types of non-local interactions. A typical example of such a theory is a large-$N$ gauge theory where by `non-local interaction' we mean the all-to-all coupling of color degrees of freedom. % Recently it has been pointed out that nontrivial features of the confinement/deconfinement

**transition**are understood as consequences of the coexistence of the confinemed and deconfinemed

**phases**on the group manifold describing the color degrees of freedom. While these novel features of the confinement/deconfinement

**transition**are analogous to the two-

**phase**coexistence at the first order

**transition**of more familiar local theories, various differences such as the partial breaking of the symmetry group appear due to the non-local interaction. % In this article, we show that similar

**phase**

**transitions**with partially broken symmetry can exist in various examples from QFT and string theory. Our examples include the deconfinement and chiral

**transition**in QCD, Gross-Witten-Wadia

**transition**in two-dimensional lattice gauge theory, Douglas-Kazakov

**transition**in two-dimensional gauge theory on sphere, and black hole/black string

**transition**

7/10 relevant

arXiv

Axisymmetric flows on the torus geometry

**phase**

**transition**in the equilibrium location of the stripe as a function of area, and this phase transition leads to a complex dependence of the Laplace pressure on the stripe area. Expand abstract.

**phase**

**transition**in the equilibrium location of the stripe as a function of area, and this

**phase**

**transition**leads to a complex dependence of the Laplace pressure on the stripe area. We also derive the underdamped oscillatory dynamics as the stripes approach equilibrium. In all cases, the analytical results are confirmed numerically using a finite-difference Navier-Stokes solver. Thus, the results presented here can be used to provide non-trivial benchmarking problems to assess the accuracy and performance of computational methods designed for flows on curved surfaces.

4/10 relevant

arXiv

0-1 **phase** **transitions** in sparse spiked matrix estimation

**phase**

**transitions**for the asymptotic minimum mean-square-error. Expand abstract.

**phase**

**transitions**for the asymptotic minimum mean-square-error. A similar

**phase**

**transition**was analyzed recently in the context of sparse high-dimensional linear regression (compressive sensing).

10/10 relevant

arXiv

Exponential growth and continuous **phase** **transitions** for the contact
process on Galton-Watson trees

6/10 relevant

arXiv

Magnetic glassy state at low spin state of Co3+ in EuBaCo2O5+{\delta} ({\delta} = 0.47) cobaltite

**transitions**and the kinetic arrest induced magnetic glassy phenomena in complex materials. Expand abstract.

**phase**

**transition**. Interesting properties, such as metastable magnetization and nonequilibrium magnetic phases, are naturally developed in the magnetic glassy state. Here, we report magnetic glass property in the low spin state of Co3+ in EuBaCo2O5+{\delta} ({\delta} = 0.47) cobaltite at low temperature (T < 60 K). The measurements of magnetization under the cooling and heating in unequal fields, magnetization relaxation and thermal cycling of magnetization show the kinetic arrest of low magnetization state below 60 K. The kinetically arrested low temperature magnetic

**phase**is further supported through the study of isothermal magnetic entropy, which shows the significant entropy change. The present results will open a new window to search the microscopic relation between the spin state

**transitions**and the kinetic arrest induced magnetic glassy phenomena in complex materials.

4/10 relevant

arXiv