Results 51 to 60 of about 108,889 (317)

Quantum “contact” friction: The contribution of kinetic friction coefficient from thermal fluctuations

Friction, 2023
A thermal model of kinetic friction is assigned to a classical loaded particle moving on a fluctuating smooth surface. A sinusoidal wave resembles surface fluctuations with a relaxation time. The Hamiltonian is approximated to the mean energy of the wave
Rasoul Kheiri
doaj   +1 more source

Studies of Optical, Dielectric, Ferroelectric, and Structural Phase Transitions in 0.9[KNbO₃]-0.1 [BaNi_1/2Nb_1/2O_3−δ]

Crystals, 2021
The compound 0.9[KNbO3]-0.1[(BaNi1/2Nb1/2O3−δ] (KBNNO), a robust eco-friendly (lead-free) ferroelectric perovskite, has diverse applications in electronic and photonic devices.
Blanca Yamile Rosas, Alvaro A. Instan, Karuna Kara Mishra, Srungarpu Nagabhusan Achary, Ram S. Katiyar   +4 more
doaj   +1 more source

Ultrasensitive Anti‐Stokes Luminescence Thermometry in Transition Metal Dichalcogenide Monolayers

Advanced Functional Materials, EarlyView.
We demonstrate a highly sensitive nanothermometer using anti‐Stokes photoluminescence, also known as photoluminescence upconversion (UPL), in monolayer tungsten disulfide. A strong resonantly enhanced UPL is observed, confirming the central role of optical phonons in the PL upconversion mechanism.
Sharada Nagarkar, Fahrettin Sarcan, Elanur Hut, Emiliano R. Martins, Stuart A. Cavill, Thomas F. Krauss, Yue Wang   +6 more
wiley   +1 more source

Electrically and Magnetically Tunable Charge–Density–Wave Transport in Quasi‐2D h‐BN/1T‐TaS2 Field Effect Devices

Advanced Electronic Materials
Controlling collective electronic phases in low‐dimensional materials is a central challenge for developing technologies based on charge‐density‐waves.
Jonas O. Brown, Maedeh Taheri, Nicholas R. Sesing, Tina T. Salguero, Alexander A. Balandin   +4 more
doaj   +1 more source

Phonon manipulation with phononic crystals [PDF]

, 2012
In this work, we demonstrated engineered modification of propagation of thermal phonons, i.e. at THz frequencies, using phononic crystals. This work combined theoretical work at Sandia National Laboratories, the University of New Mexico, the University of Colorado Boulder, and Carnegie Mellon University; the MESA fabrication facilities at Sandia; and ...
Bongsang, Kim, Hopkins, Patrick Edward, Leseman, Zayd C., Goettler, Drew F., Su, Mehmet F. (University of New Mexico, Albuquerque, NM), El-Kady, Ihab Fathy, Reinke, Charles M., Olsson, Roy H., III   +10 more
openaire   +2 more sources

Valence Band Modification and Enhanced Phonon-Phonon Interactions for High Thermoelectric Performance in GeTe [PDF]

The strong coupling between carrier and phonon transport in thermoelectric (TE) materials severely limits improvements to the figure of merit (ZT). In this work, an approach is proposed to weaken electron-phonon coupling, effectively enhancing the TE ...
Li, Ruiheng, Tan, Xiaobo, Hong, Min, Zhu, Jianglong, Sun, Qiang, Ang, Ran, Song, Pingan, Feng, Fan   +7 more
core   +1 more source

Quantifying Subsurface Weak in‐Plane Magnetization of Mixed Phase BiFeO3 by Scanning Nitrogen Vacancy Magnetometry

Advanced Functional Materials, EarlyView.
We use scanning nitrogen vacancy magnetometry to directly image the weak in‐plane magnetic moments in mixed phase BiFeO3 at the nanoscale and quantify the local magnetic moments to be 18.8±2.0 μB/nm2 in the rhombohedral‐like phase and 1.5±0.6 μB/nm2 in the well‐known non‐magnetic tetragonal‐like phase.
Lei Wang, Zhewen Xu, Yuwen Xu, Björn Josteinsson, Simon Josephy, Dawei Zhang, Yunlong Sun, Heung‐Sik Park, Jihun Kim, Kanghyun Chu, Kyung Song, Danyang Wang, Chan‐Ho Yang, Andrea Morales, Jan Seidel   +14 more
wiley   +1 more source

Multifunctional Native Defects Boosting the Thermoelectric Transport in Few‐Layer PdPS

Advanced Electronic Materials
As a unique Cairo pentagonal 2D material, palladium phosphide sulfide (PdPS) has garnered immense interests due to its excellent optoelectronic properties, anisotropic electronic transport behavior, and good air‐stability.
Zehao Yu, Meilin Li, Yu Yang, Peng Yu, Ady Suwardi, Lifa Zhang, Yunshan Zhao   +6 more
doaj   +1 more source

Phonon-induced decoherence of a charge quadrupole qubit

New Journal of Physics, 2018
Many quantum dot qubits operate in regimes where the energy splittings between qubit states are large and phonons can be the dominant source of decoherence.
Viktoriia Kornich, Maxim G Vavilov, Mark Friesen, S N Coppersmith   +3 more
doaj   +1 more source

A Thermal Transport Study of Branched Carbon Nanotubes with Cross and T-Junctions

Applied Sciences, 2021
This study investigated the thermal transport behaviors of branched carbon nanotubes (CNTs) with cross and T-junctions through non-equilibrium molecular dynamics (NEMD) simulations.
Wei-Jen Chen, I-Ling Chang
doaj   +1 more source