Zobrazeno 1 - 10
of 1 591
pro vyhledávání: '"Lunkenheimer P"'
Autor:
Lunkenheimer, Peter, Loidl, Alois
Poly(ethylene oxide) is an important polymer with many applications, e.g., as solid-state electrolyte in batteries. Its relaxation dynamics, characterizing its molecular and submolecular motions, which is relevant for many of these applications, was
Externí odkaz:
http://arxiv.org/abs/2411.07807
Publikováno v:
Phys. Rev. B 110 (2024), 134110
Recently, a universal relation between the thermal expansion coefficient of glasses $\alpha_g$, their glass-transition temperature Tg, and the so-called fragility index m of the corresponding supercooled liquid state was found to be valid for more th
Externí odkaz:
http://arxiv.org/abs/2410.20434
In conventional ferroelectrics the electric dipoles are generated by off-center displacements of ions. In recent years, a new type of so-called electronic ferroelectrics has attracted great attention, where the polarization is driven by electronic de
Externí odkaz:
http://arxiv.org/abs/2409.13836
A detailed study of published experimental data for a variety of materials on the incremental variation of heat capacity, thermal expansion, and compressibility at glassy freezing reveals a striking dependence of the Prigogine-Defay ratio R on the fr
Externí odkaz:
http://arxiv.org/abs/2405.05612
Publikováno v:
J. Phys. Chem. B 128 (2024) 3454
Deep eutectic solvents with admixed lithium salts are considered as electrolytes in electrochemical devices like batteries or supercapacitors. Compared to eutectic mixtures of hydrogen-bond donors and lithium salts, their raw-material costs are signi
Externí odkaz:
http://arxiv.org/abs/2401.12186
Autor:
Zhou, L., Puntigam, L., Lunkenheimer, P., Bourret, E., Yan, Z., Kézsmárki, I., Meier, D., Krohns, S., Schultheiß, J., Evans, D. M.
Publikováno v:
Matter 7 (2024), 2996
A promising mechanism for achieving colossal dielectric constants is to use insulating internal barrier layers, which typically form during synthesis and then remain in the material. It has recently been shown that insulating domain walls in ferroele
Externí odkaz:
http://arxiv.org/abs/2401.10835
Publikováno v:
J. Chem. Phys. 160 (2024) 145103
We present a detailed study on the temperature-dependent THz spectra of the polycrystalline amino acids L-serine and L-cysteine for wave numbers from 20 to 120 cm-1 and temperatures from 4 to 300 K. Even though the structure of these two amino acids
Externí odkaz:
http://arxiv.org/abs/2312.07996
Publikováno v:
J. Chem. Phys. 160 (2024) 074503
The glass formation and the dipolar reorientational motions in deep eutectic solvents (DESs) are frequently overlooked, despite their crucial role in defining the room-temperature physiochemical properties. To understand the effects of these dynamics
Externí odkaz:
http://arxiv.org/abs/2311.17724
Publikováno v:
J. Chem. Phys. 160 (2024) 054502
Glass formation and reorientational motions are widespread, but often-neglected features of deep eutectic solvents, although both can be relevant for the technically important ionic conductivity at room temperature. Here we investigate these properti
Externí odkaz:
http://arxiv.org/abs/2311.09360
Autor:
Thomas, Tatjana, Agarmani, Yassine, Hartmann, Steffi, Kartsovnik, Mark, Kushch, Natalia, Winter, Stephen M., Schmid, Sebastian, Lunkenheimer, Peter, Lang, Michael, Mueller, Jens
Using a combination of resistance fluctuation (noise) and dielectric spectroscopy we investigate the nature of relaxor-type electronic ferroelectricity in the organic conductor $\kappa$-(BETS)$_2$Mn[N(CN)$_2$]$_3$, a system representative for a wider
Externí odkaz:
http://arxiv.org/abs/2310.17242