Results 141 to 150 of about 129,819 (311)

Bright‐Dark Exciton Splitting in Lead Iodide Perovskite Crystals Accessed via Quantum Beats in Photon Echoes

open access: yesAdvanced Optical Materials, EarlyView.
Understanding exciton fine structure is crucial for optoelectronic and quantum photonic applications of lead halide perovskites. It is demonstrated that polarization‐sensitive photon‐echo spectroscopy in a magnetic field resolves exciton fine‐structure splittings hidden by inhomogeneous broadening, enabling direct determination of the bright‐dark ...
M. Alex Hollberg   +9 more
wiley   +1 more source

Ab-initio phonon calculation for BaSr2I6 / P4_2/mnm (136) / materials id 754224

open access: yes
Ab-initio phonon calculation for BaSr2I6 / P4_2/mnm (136) Phonon band structure, phonon DOS, thermal properties at constant volume, and phonon raw data are presented.
Atsushi Togo
core  

An Examination of the Cs2NaInCl6 Luminescence: Interplay of Self‐Generated In+ and Doped Sb3+, Er3+/Yb3+ Ions

open access: yesAdvanced Optical Materials, EarlyView.
A new luminescence mechanism in Cs2NaInCl₆ is revealed through spontaneously formed In3+→In+ centers and Er3+/Yb3+/Sb3+ doping. Tunable visible, near‐infrared, downconversion, and upconversion emissions are demonstrated, while DFT calculations explain the electronic structure.
Inna A. Ivashchenko   +10 more
wiley   +1 more source

Ab-initio phonon calculation for SrMgNiH4 / P2_13 (198) / materials id 643293

open access: yes
Ab-initio phonon calculation for SrMgNiH4 / P2_13 (198) Phonon band structure, phonon DOS, thermal properties at constant volume, and phonon raw data are presented.
Atsushi Togo
core  

Waveguide Photoactuators: Materials, Fabrication, and Applications

open access: yesAdvanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi   +4 more
wiley   +1 more source

Ab-initio phonon calculation for Sb2O3 / Fd-3m (227) / materials id 1999

open access: yes
Ab-initio phonon calculation for Sb2O3 / Fd-3m (227) Phonon band structure, phonon DOS, thermal properties at constant volume, and phonon raw data are presented.
Atsushi Togo
core  

Laser‐Induced Ultrafast Magnetic Phase Transition in 2D Van Der Waals Antiferromagnetic Heterostructures

open access: yesAdvanced Science, EarlyView.
In this work, ultrafast laser‐induced spin transfer and spin relaxation dynamics in 2D van der Waals antiferromagnetic CrI3/CrGeTe3 heterostructures are investigated. Laser excitation is demonstrated to induce pronounced interlayer nonequilibrium spin dynamics and ultrafast magnetic moment reconstruction, driving a transition from an antiferromagnetic (
Yang Wu   +5 more
wiley   +1 more source

Ab-initio phonon calculation for Ba2NdNbO6 / Fm-3m (225) / materials id 12637

open access: yes
Ab-initio phonon calculation for Ba2NdNbO6 / Fm-3m (225) Phonon band structure, phonon DOS, thermal properties at constant volume, and phonon raw data are presented.
Atsushi Togo
core  

Thermodynamics of Concomitant Charge‐Transfer, Antiferromagnetic, and Isostructural Phase Transitions in Barocaloric ACu3Fe4O12 Quadruple Perovskites

open access: yesAdvanced Science, EarlyView.
A copper‐iron charge transfer instability drives concomitant electronic, magnetic, and isostructural phase transitions in ACu3Fe4O12${\rm ACu}_3{\rm Fe}_4{\rm O}_{12}$, with an inverse barocaloric effect. A minimal Landau theory ties these thermodynamic signatures together, revealing a pressure‐independent transition entropy with comparable charge and ...
Jefferson Delgado‐Quesada   +1 more
wiley   +1 more source

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