Results 141 to 150 of about 661,161 (337)

Ferroelectricity in Single‐Crystalline BaTiO3 Nanodisks on Silicon

Advanced Functional Materials, EarlyView.
Ferroelectricity is studied in 20 nm thick single crystalline BaTiO3 nanodisks when scaling their diameter from ≈ 400 down to 100 nm. For 100 nm diameter, the vertical polarization component adopts three distinct patterns, and the lateral one shows a rotational invariance in‐plane, suggesting a combination of center‐type and flux‐closure domains.
Ibukun Olaniyan, Jürgen Albert, Beatriz Canabarro, Haidong Lu, Sven Wiesner, Nikolay Cherkashin, Alexei Gruverman, Sylvie Schamm‐Chardon, Dong‐Jik Kim, Catherine Dubourdieu   +9 more
wiley   +1 more source

Cold Dark Matter and Self-interacting Dark Matter Interpretations of the Strong Gravitational Lensing Object JWST-ER1

The Astrophysical Journal Letters
van Dokkum et al. reported the discovery of JWST-ER1, a strong lensing object at redshift z ≈ 2, using data from the James Webb Space Telescope. The lens mass within the Einstein ring is 5.9 times higher than the expected stellar mass from a Chabrier ...
Demao Kong, Daneng Yang, Hai-Bo Yu
doaj   +1 more source

Structural and Chemical Studies of the Nanoscale Modifications Induced by Swift Heavy Ion Irradiation in SrTiO3 at Grazing Incidence

Advanced Functional Materials, EarlyView.
The nanoscale structural and chemical transformations in SrTiO3 under Swift‐Heavy‐Ion irradiation at grazing incidence are investigated, emphasizing the formation of well‐ordered nanohillocks at the surface of the material, demonstrating significant material decomposition in the created hillocks with: a phase separation of SrO and TiOx, a reduction in ...
Mohammad S. Jamal, Victor Pierron, Tagi Tagiyev, Jérémy Blond, Stéphane Guillous, Clara Grygiel, Stéphane Flament, Bruno Guillet, Zhe Wang, Darrell G. Schlom, Isabelle Monnet, Laurence Méchin, Mamour Sall   +12 more
wiley   +1 more source

On a Critical Acceleration Scale of Dark Matter in ΛCDM and Dynamical Dark Energy

The Astrophysical Journal
Universal acceleration a _0 emerges in various empirical laws, yet its fundamental nature remains unclear. Using Illustris and Virgo N -body simulations, we focus on the velocity and acceleration fluctuations in collisionless dark matter involving long ...
Zhijie Xu
doaj   +1 more source

Peculiar velocities of galaxy clusters: a comparison of mixed dark matter and low-density cold dark matter [PDF]

, 1994
Rupert A. C. Croft, G. Efstathiou
openalex   +1 more source

Unlocking the Full Potential of MgAgSb by Unravelling the Interrelation of Phase Constitution and Thermoelectric Properties

Advanced Functional Materials, EarlyView.
Persistent secondary phases govern the performance of many thermoelectric materials, particularly of high performance MgAgSb. In this study advanced microstructural characterization for unequivocal phase identification combined with transport modeling and statistical analysis enabled the quantification of each phase's impact, revealing the most ...
Amandine Duparchy, Frederic Kreps, Eckhard Müller, Johannes de Boor   +3 more
wiley   +1 more source

Axino as Cold Dark Matter Candidate [PDF]

, 2002
LaTeX file of 10 pages including 2 eps figures. Talk presented at DM-2002 Conference at Cape Town, South Africa, Feb.
openaire   +3 more sources

CO2 Reduction on Copper‐Nitrogen‐Doped Carbon Catalysts Tuned by Pulsed Potential Electrolysis: Effect of Pulse Potential

Advanced Functional Materials, EarlyView.
This study demonstrates that pulsed potential electrolysis significantly improves CO2 reduction performance on copper‐nitrogen doped carbon electrodes. The formation of cationic copper sites and metallic clusters as a function of applied intermittent potential leads to notable selectivity changes compared to potentiostatic reduction.
Dorottya Hursán, Janis Timoshenko, Andrea Martini, Hyo Sang Jeon, Eduardo Ortega, Martina Rüscher, Arno Bergmann, Aram Yoon, Uta Hejral, Antonia Herzog, Clara Rettenmaier, Felix T. Haase, Philipp Grosse, Beatriz Roldan Cuenya   +13 more
wiley   +1 more source

A MARVEL-ous Study of How Well Galaxy Shapes Reflect Dark Matter Halo Shapes in Cold Dark Matter Simulations

The Astrophysical Journal
We present a 3D shape analysis of both dark matter (DM) and stellar matter (SM) in simulated dwarf galaxies to determine whether stellar shape traces DM shape. Using 80 central and satellite dwarf galaxies from three simulation suites (“Marvelous Massive
Blake Keith, Ferah Munshi, Alyson M. Brooks, Jordan Van Nest, Anna Engelhardt, Akaxia Cruz, Ben Keller, Thomas Quinn, James Wadsley   +8 more
doaj   +1 more source

Phase-space structure of cold dark matter halos [PDF]

, 1992
P. Sikivie, James R. Ipser
openalex   +1 more source