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@arXiv_condmatmtrlsci_bot@mastoxiv.page
2025-09-18 08:10:51

Proximity Ferroelectricity in Compositionally Graded Structures
Eugene A. Eliseev, Anna N. Morozovska, Sergei V. Kalinin, Long-Qing Chen, Venkatraman Gopalan
https://arxiv.org/abs/2509.13443

Proximity Ferroelectricity in Compositionally Graded Structures
Proximity ferroelectricity is a novel paradigm for inducing ferroelectricity in a non-ferroelectric polar material such as AlN or ZnO that are typically unswitchable with an external field below their dielectric breakdown field. When placed in direct contact with a thin switchable ferroelectric layer (such as Al1-xScxN or Zn1-xMgxO), they become a practically switchable ferroelectric. Using the thermodynamic Landau-Ginzburg-Devonshire theory, in this work we performed the finite element modelin…

@gideonstar@mastodon.gideonstar.de
2025-08-14 22:01:52

#Nachtschicht auf 3Sat war echt gut. Aber es tut mir leid das sagen zu müssen, @…, Albrecht Ganskopf hat allen die Show gestohlen. "Hände desinfizieren, Abstand halten!"

@arXiv_astrophGA_bot@mastoxiv.page
2025-09-09 10:54:32

ALMA-IMF XX: Core fragmentation in the W51 high-mass star-forming region
T. Yoo, A. Ginsburg, J. Braine, N. Budaiev, F. Louvet, F. Motte, A. M. Stutz, B. Thomasson, M. Armante, M. Bonfand, S. Bontemps, L. Bronfman, G. Busquet, T. Csengeri, N. Cunningham, J. Di Francesco, D. J. D\'iaz-Gonz\'alez, M. Fern\'andez-Lopez, R. Galv\'an-Madrid, C. Goddi, A. Gusdorf, N. Kessler, A. Koley, H. -L Liu, T. Nony, F. Olguin, P. Sanhueza, M. Valeille-Manet, L. A. Zapata, Q. Zhang
…

ALMA-IMF XX: Core fragmentation in the W51 high-mass star-forming region
We present a study of core fragmentation in the W51-E and W51-IRS2 protoclusters in the W51 high-mass star-forming region. The identification of core fragmentation is achieved by the spatial correspondence of cores and compact sources which are detected in the short (low resolution) and the long baseline (high resolution) continuum images with the Atacama Large Millimeter/submillimeter Array (ALMA) in Bands 3 (3 mm) and 6 (1.3 mm), respectively. We characterize the compact sources found in the …

@arXiv_mathAP_bot@mastoxiv.page
2025-07-29 09:00:21

A further remark on the density estimate for degenerate Allen-Cahn equations: $\Delta_{p}$-type equations for $1<p<\frac{n}{n-1}$ with rough coefficients
Chilin Zhang
https://arxiv.org/abs/2507.19820

A further remark on the density estimate for degenerate Allen-Cahn equations: $Δ_{p}$-type equations for $1
In this short remark on a previous paper \cite{SZ25}, we continue the study of Allen-Cahn equations associated with Ginzburg-Landau energies \begin{equation*} J(v,Ω)=\int_Ω\Big\{F(\nabla v,v,x)+W(v,x)\Big\}dx, \end{equation*} involving a Dirichlet energy $F(\vecξ,τ,x)\sim|\vecξ|^{p}$ and a degenerate double-well potential $W(τ,x)\sim(1-τ^{2})^{m}$. In contrast to \cite{SZ25}, we remove all regularity assumptions on the Ginzburg-Landau energy. Then, with further assumptions th…

@arXiv_csIT_bot@mastoxiv.page
2025-09-30 08:53:01

RIS- and Multi-Snapshot-Enabled SISO 3D Position and Velocity Estimation With Single Base Station
Yirun Wang, Yongqing Wang, Yuyao Shen, Gongpu Wang, Chintha Tellambura
https://arxiv.org/abs/2509.23274

RIS- and Multi-Snapshot-Enabled SISO 3D Position and Velocity Estimation With Single Base Station
Reconfigurable intelligent surface (RIS) panels can act as cost-effective anchors for radio localization, complementing conventional base station (BS) anchors. This paper investigates joint three-dimensional position and velocity estimation (3D-JPVE) in single-input single-output (SISO) systems with only one BS available. We first theoretically show that 3D-JPVE is infeasible when relying solely on a single RIS or on multiple snapshots alone. To address this, we propose combining RIS deployment…

@arXiv_astrophGA_bot@mastoxiv.page
2025-10-07 09:02:12

ALMA-IMF. XXI.: N$_2$H$^ $ kinematics in the G012.80 protocluster: Evidence for filament rotation and evolution
J. Salinas, A. M. Stutz, R. H. \'Alvarez-Guti\'errez, N. A. Sandoval-Garrido, F. Louvet, R. Galv\'an-Madrid, F. Motte, M. Armante, T. Csengeri, J. Braine, A. Ginsburg, M. Valeille-Manet, L. Bronfman, P. Sanhueza, D. D\'iaz, G. Busquet, A. Koley, M. Bonfand, M. Fern\'andez-L\'opez, N. Castro-Toledo, R. Veyry, G. Bernal-Mesina

ALMA-IMF. XXI.: N$_2$H$^+$ kinematics in the G012.80 protocluster: Evidence for filament rotation and evolution
(abridged) We aim to characterize kinematic processes in the G012.80 protocluster. We principally focus on the N$_2$H$^+$(1$-$0) emission to trace the dense and cold gas. Additionally, we use lines such as DCN(3$-$2), H41$α$, C$^{18}$O(1$-$0), and SiO(5$-$4), as well as continuum maps. We perform a N$_2$H$^+$ hyperfine spectral line fitting to analyze multiple velocity components and spectral parameters. We estimate velocity gradients, column densities, and line-mass profiles for the two main …

@arXiv_astrophGA_bot@mastoxiv.page
2025-07-22 09:10:40

ALMA-IMF XIX: C18O (J=2-1): Measurements of turbulence in 15 massive protoclusters
A. Koley, A. M. Stutz, F. Louvet, F. Motte, A. Ginsburg, R. Galv\'an-Madrid, R. H. \'Alvarez-Guti\'errez, P. Sanhueza, T. Baug, N. Sandoval-Garrido, J. Salinas, G. Busquet, J. Braine, H. -L. Liu, T. Csengeri, A. Gusdorf, M. Fern\'andez-L\'opez, N. Cunningham, L. Bronfman, M. Bonfand

ALMA-IMF XIX: C18O (J=2-1): Measurements of turbulence in 15 massive protoclusters
ALMA-IMF is a large program of the Atacama Large Millimeter/submillimeter Array (ALMA) that aims to determine the origin of the core mass function (CMF) of 15 massive Galactic protoclusters (~ 1.0-25.0 x 10^3 solar mass within ~ 2.5 x 2.5 pc^2 ) located towards the Galactic plane. In addition, the objective of the program is to obtain a thorough understanding of their physical and kinematic properties. Here we study the turbulence in these protoclusters with C18O (2-1) emission line using the s…

@arXiv_astrophGA_bot@mastoxiv.page
2025-10-02 09:22:10

The Colors of Ices: Measuring ice column density through photometry
Adam Ginsburg, Savannah R. Gramze, Matthew L. N. Ashby, Brandt A. L. Gaches, Nazar Budaiev, Miriam G. Santa-Maria, Alyssa Bulatek, A. T. Barnes, Desmond Jeff, Neal J. Evans II, Cara D. Battersby
https://arxiv.org/abs/2510.00292

The Colors of Ices: Measuring ice column density through photometry
Ices imprint strong absorption features in the near- and mid-infrared, but until recently they have been studied almost exclusively with spectroscopy toward small samples of bright sources. We show that JWST photometry alone can reveal and quantify interstellar ices and present a new open-source modeling tool, icemodels, to produce synthetic photometry of ices based on laboratory measurements. We provide reference tables indicating which filters are likely to be observably affected by ice absor…

@arXiv_astrophGA_bot@mastoxiv.page
2025-09-29 09:04:18

Mapping CO Ice in a Star-Forming Filament in the 3 kpc Arm with JWST
Savannah Gramze, Adam Ginsburg, Nazar Budaiev, Alyssa Bulatek, Theo Richardson, A. T. Barnes, Miriam G. Santa-Maria, Mattia C. Sormani, Xing Lu, Francisco Nogueras-Lara, Brandt A. L. Gaches, Cara D. Battersby, Jennifer Wallace, Daniel L. Walker, Elisabeth A. C. Mills, Michael Mattern
https://

Mapping CO Ice in a Star-Forming Filament in the 3 kpc Arm with JWST
CO gas emission is a fundamental tool for measuring column density, but in cold, dark clouds, much of the CO is locked away in ice. We present JWST results from observations of a star forming filament (G0.342+0.024) that that appears to be associated with the 3 kpc arm. This filament is backlit by the Galactic Center, which has allowed us to construct a high-resolution extinction map (mean separation between stars of ~1" outside the filament, ~2" in the filament). ALMA Band 3 data reveals embed…