Article
Physics, Multidisciplinary
Keivan Esfarjani
Summary: This study develops a classical formalism based on the equation of motion method, the fluctuation-dissipation theorem and the Novikov theorem to describe heat flow in a multi-terminal geometry. The research shows that including a quartic term in the potential energy is essential for stability and accurate description of thermal expansion.
Article
Physics, Condensed Matter
J. Bouchet, F. Bottin, D. Antonangeli, G. Morard
Summary: In this study, the sound velocities and thermodynamical properties of hcp iron are computed using ab initio calculations. The results show excellent agreement with experimental data for various thermodynamical quantities. With increasing temperature, a strong decrease in phonon frequencies is observed, indicating the significance of intrinsic anharmonic effects. Previous theoretical data for sound velocities are compared and discrepancies with experiments are discussed. Additionally, a temperature dependent Birch's law is proposed and compared with previous experimental work.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Engineering, Mechanical
Soon Kim, Sung Youb Kim
Summary: The study discovered that dislocation mobility in FCC crystals at ultralow temperatures is influenced by the dislocation oscillation mode and drag mechanism, rather than material properties. This suggests that the description of FCC crystal plasticity might be consistent at ultralow temperatures, independent of materials.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Multidisciplinary Sciences
Suixuan Li, Zihao Qin, Huan Wu, Man Li, Martin Kunz, Ahmet Alatas, Abby Kavner, Yongjie Hu
Summary: This study conducted in-situ thermal transport measurements on the newly discovered semiconductor crystal boron arsenide under high hydrostatic pressure and observed anomalous pressure dependence of the thermal conductivity. By using ultrafast optics, Raman spectroscopy, and inelastic X-ray scattering measurements, as well as atomistic theory calculations, the researchers revealed the mechanism behind this anomalous behavior and verified the accuracy of the theoretical calculations. The study also showed phonon dynamics beyond classical models, providing fundamental insights into microscopic energy transport in materials of extreme properties.
Article
Biochemistry & Molecular Biology
Mingming Zhou, Jing Luo, Dong Xiang
Summary: The host-guest inclusion strategy can overcome the limitations of single explosives in terms of energy density and performance. Guest molecules can enhance the detonation performance and stability of host explosives. Therefore, it is necessary to analyze the influence of guest molecules on the pyrolysis decomposition of host-guest explosives.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Christiane Stephan-Scherb, Juho Lehmusto, Florian Falk, Oded Sobol, Bruce A. Pint
Summary: This study presents a comprehensive investigation on the combined oxidation/sulfidation induced by mixed-gas atmospheres using label molecules. Fe-Cr model alloys with varying Cr-content were exposed to different gas mixtures and characterized using secondary ion mass spectroscopy and energy dispersive X-ray diffraction. The results indicate that both S16O2 and H218O contribute to the oxidation of the alloys, with varying extents depending on the Cr-content.
Article
Physics, Applied
Jona Gruembel, Rudiger Goldhahn, Dae-Woo Jeon, Martin Feneberg
Summary: The Raman excitations of an alpha-Ga2O3 thin film were investigated, and the contributions of different decay mechanisms to the phonon modes were quantified through model calculations. The experimental data can be well described by the applied theoretical models, and the phonon modes of alpha-Ga2O3 show smaller frequency shifts and broadening under temperature variation compared to other materials.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Genki Horiguchi, Masahiro Ito, Atsuki Ito, Hidehiro Kamiya, Yohei Okada
Summary: This study clarified the role of phosphorus in particle adhesion at high temperatures using synthetic ashes, and found that the addition of iron oxide nanoparticles significantly decreased the adhesiveness of phosphorus-containing synthetic ashes. This information can be helpful in controlling the adhesiveness of ashes produced from sewage sludge incineration.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Prosper Ngabonziza, Yi Wang, Peter A. van Aken, Joachim Maier, Jochen Mannhart
Summary: Researchers have developed high-temperature-stable tunnel junctions for inelastic tunneling spectroscopy studies above room temperature. By analyzing the vibrational modes of O-H bonds in BaZrO3-based heterostructures, they achieved proton detection with a spectral resolution of 20 meV at 400 K, overturning previous predictions. This breakthrough enables high-temperature tunneling spectroscopy of ion conductors, making it a novel and valuable analytical tool for solid-state ionics.
ADVANCED MATERIALS
(2021)
Article
Astronomy & Astrophysics
Cheng-Jun Xia, Toshiki Maruyama, Nobutoshi Yasutake, Toshitaka Tatsumi
Summary: In this study, nuclear pasta structures at high temperatures are investigated using a relativistic mean field model with Thomas-Fermi approximation. Different crystalline configurations of pasta structures are obtained, and their properties are examined. It is found that different structures can evolve into each other, with small differences in the free energies per baryon.
Article
Astronomy & Astrophysics
Dietrich Boedeker, Jan Nienaber
Summary: This passage mainly discusses the motion of a scalar field interacting with a hot plasma, the damping process and the relation between the damping coefficient and bulk viscosity.
Article
Chemistry, Physical
Ivan A. Kruglov, Alexey V. Yanilkin, Yana Propad, Arslan B. Mazitov, Pavel Rachitskii, Artem R. Oganov
Summary: Crystal structure prediction, a long-standing problem in crystallography and materials science, has been largely solved with methods such as energy landscape exploration and global optimization. However, existing methods neglect temperature and may miss high-temperature phases. In this study, a new and cost-effective solution is developed to predict crystal structures at finite temperatures, taking into account thermal effects and providing accurate results.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Canjun Zhao, Yukai Lin, Xiaomin Wu
Summary: This study investigated the wetting characteristics of a lead droplet on an iron surface at high temperatures. Results showed that the wetting process leads to corrosion of the iron substrate.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Ousman Boukar, Jean Jules Fifen, Alhadji Malloum, Mama Nsangou, Hassen Ghalila, Jeanet Conradie
Summary: In this study, the structures and energy parameters of the ferrous ion in methanol were investigated to determine the solvation free energies and solvation enthalpies. It was found that the solvation free energies were more affected by temperature, while the solvation enthalpies remained relatively constant.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Multidisciplinary
M. Bernal-Choban, H. L. Smith, C. N. Saunders, D. S. Kim, L. Mauger, D. L. Abernathy, B. Fultz
Summary: The phonon densities of states (DOSs) of body-centered cubic chromium were studied above the Néel temperature using time-of-flight inelastic neutron scattering. Experimental results showed a significant softening of the phonon DOSs with increasing temperature. The high-transverse phonon branch softened by about 17%, while the low-transverse branch softened by approximately half of that. The calculated vibrational entropies from phonons and electrons agreed well with the entropy obtained by calorimetry, suggesting that there were no explicit temperature-dependent magnetic contributions above 330 K.
Article
Materials Science, Multidisciplinary
Tian Lan, C. W. Li, O. Hellman, D. S. Kim, J. A. Munoz, H. Smith, D. L. Abernathy, B. Fultz
Article
Materials Science, Multidisciplinary
C. W. Li, H. L. Smith, T. Lan, J. L. Niedziela, J. A. Munoz, J. B. Keith, L. Mauger, D. L. Abernathy, B. Fultz
Article
Engineering, Electrical & Electronic
Kevin L. Lin, Graham L. W. Cross, Peter Gleeson, Johann P. de Silva, Alejandro Levander, Jorge A. Munoz, Chytra Pawashe, Alexis Potie, Patrick Theofanis, John J. Boland, Kelin J. Kuhn
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2016)
Article
Physics, Multidisciplinary
F. C. Yang, J. A. Munoz, O. Hellman, L. Mauger, M. S. Lucas, S. J. Tracy, M. B. Stone, D. L. Abernathy, Yuming Xiao, B. Fultz
PHYSICAL REVIEW LETTERS
(2016)
Article
Physics, Applied
M. S. Lucas, L. Mauger, J. A. Munoz, I. Halevy, J. Horwath, S. L. Semiatin, S. O. Leontsev, M. B. Stone, D. L. Abernathy, Yuming Xiao, Paul Chow, B. Fultz
JOURNAL OF APPLIED PHYSICS
(2013)
Article
Chemistry, Physical
David G. Abrecht, Jorge A. Munoz, Hillary L. Smith, Brent Fultz
JOURNAL OF PHYSICAL CHEMISTRY C
(2014)
Article
Physics, Condensed Matter
Fritz Koermann, Abed Al Hasan Breidi, Sergei L. Dudarev, Nathalie Dupin, Gautam Ghosh, Tilmann Hickel, Pavel Korzhavyi, Jorge A. Munoz, Ikuo Ohnuma
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2014)
Article
Materials Science, Multidisciplinary
J. A. Munoz, M. S. Lucas, L. Mauger, I. Halevy, J. Horwath, S. L. Semiatin, Yuming Xiao, Paul Chow, M. B. Stone, D. L. Abernathy, B. Fultz
Article
Materials Science, Multidisciplinary
S. J. Tracy, L. Mauger, H. J. Tan, J. A. Munoz, Yuming Xiao, B. Fultz
Article
Physics, Nuclear
Jorge A. Munoz, Marcos A. Garcia, Jorge A. Lopez
Summary: We study the change in internal rotational energy during the transformation of protons to neutrons in the collapse of the iron core of massive stars that precede Type II supernova explosions. We treat the protons and neutrons as triatomic rotors and evaluate the equilibrium constant to estimate this change.
INTERNATIONAL JOURNAL OF MODERN PHYSICS E
(2022)
Proceedings Paper
Astronomy & Astrophysics
J. A. Lopez, J. A. Munoz, C. O. Dorso, G. A. Frank
27TH INTERNATIONAL NUCLEAR PHYSICS CONFERENCE (INPC2019)
(2020)
Article
Materials Science, Multidisciplinary
L. Mauger, J. E. Herriman, O. Hellman, S. J. Tracy, M. S. Lucas, J. A. Munoz, Yuming Xiao, J. Li, B. Fultz
Proceedings Paper
Physics, Applied
Jorge A. Munoz, Brent Fultzt
RADIATION PHYSICS: XI INTERNATIONAL SYMPOSIUM ON RADIATION PHYSICS
(2015)