Results 101 to 110 of about 35,127 (280)

Phase Diagrams of Carbonate Materials at High Pressures, with Implications for Melting and Carbon Cycling in the Deep Earth

open access: yesGeophysical Monograph Series, Page 137-165., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Konstantin Litasov   +3 more
wiley  

+1 more source

Isoelectronic Alloying in Zintl Phases Mediated the Avoided Crossing and Phonon Softening

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A small amount of Hf doping endows Zr3Ni3Sb4‐Zintl with an unusually low thermal conductivity far exceeding that of similar systems. Two unique phonon mechanisms—avoided crossing and phonon softening—significantly suppress the lattice thermal conductivity. The average thermoelectric figure of merit is improved by 21%.
Zesong Wang   +6 more
wiley   +1 more source

First-Principles Investigation on Type-II Aluminum-Substituted Ternary and Quaternary Clathrate Semiconductors R8Al8Si128 (R = Cs, Rb), Cs8Na16Al24Si112

open access: yesApplied Sciences, 2019
Structural and vibrational properties of the aluminium-substituted ternary and quaternary clathrates R8Al8Si128 (R = Cs, Rb), Cs8Na16Al24Si112 are investigated.
Dong Xue, Charles W. Myles
doaj   +1 more source

Stepwise Optimization of Thermoelectric Performance in Cu3SbSe4‐Based Compounds via Alloying and Hierarchical Structuring

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Under the stepwise optimization strategy, (Sn, Te) co‐alloying functions as the primary initiative to enhance the power factor (PF), while the subsequent incorporation of AgCuTe operates as a synergistic maneuver to suppress lattice thermal conductivity (κlat), thereby concomitantly boosting the dimensionless figure of merit (ZT).
Wenying Wang   +7 more
wiley   +1 more source

Balancing the Competing Effects of Carrier and Phonon Transport Mechanisms to Enhance the Thermoelectric Properties of p‐Type Ti2Zr2−xHf2Nb2Fe5.6Ni2.4Sb8 Double Half‐Heusler Alloys via Cation Vacancy Engineering

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
By designing Zr vacancy‐filled p‐type Ti2Zr2Hf2Nb2Fe5.6Ni2.4Sb8‐based thermoelectric materials, multi‐physics mechanisms and multi‐scale microstructural defects are induced to optimize electrical properties and phonon transport while suppressing the bipolar diffusion effect.
Chaoyue Wang   +8 more
wiley   +1 more source

High coherence hybrid superconducting qubit

open access: yes, 2010
We measure the coherence of a new superconducting qubit, the {\em low-impedance flux qubit}, finding $T_2^* \sim T_1 \sim 1.5\mu$s. It is a three-junction flux qubit, but the ratio of junction critical currents is chosen to make the qubit's potential ...
DiVincenzo, David P.   +6 more
core   +1 more source

Superionic Conduction Through Lattice Engineering of Fluorites Stabilizing Periodic Oxygen Vacancy Network

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Lattice‐engineered fluorite oxide with periodic oxygen vacancy network achieves superionic conduction, Ce4+–Al3+ fluorite cation ordering enables dielectric‐enhanced superionic conduction, surpassing the limitations of conventional doped electrolytes and high fuel cell performance at low temperature through a flattened energy landscape.
Shahzad Rasool   +18 more
wiley   +1 more source

From Phonons to Domain Walls, the Central Peak and “Critical Slowing Down”

open access: yesCondensed Matter
We investigate perovskite oxides from different perspectives, namely their pseudo-harmonic dynamical properties, their dynamical properties when strong anharmonicity exists, and the intriguing functionalities arising from domain walls.
Ekhard K. H. Salje   +1 more
doaj   +1 more source

Design of High‐Performance MnCo1.5Cu0.5O4 Spinel Contact Material with Optimized Electrical Conductivity and Thermal Stability for Solid Oxide Electrolysis Cells by Cu Doping

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Cu‐doped spinel MnCo1.5Cu0.5O4 exhibits excellent conductivity and stability as SOC contact material. After 1000‐h aging at 850 °C, the contact layer maintains a 10 mΩ cm2 ASR value, and a single‐cell stack achieves a H2O/CO2 co‐electrolysis power density of 0.52 W cm−2.
Haozhen Li   +7 more
wiley   +1 more source

Energy of Crystal Lattice Thermal Oscillations in TlGaS2 Semiconductor Compound

open access: yesEast European Journal of Physics
This article presents the results of a study of the temperature dependences of the coefficients of thermal expansion and isothermal compressibility of the ternary compound TlGaS2.
Kamala М. Guseinova   +4 more
doaj   +1 more source

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