Results 231 to 240 of about 129,819 (311)

Programming Structural Symmetry and Emission in Low‐Dimensional Hybrid Perovskites via Time and Temperature

Advanced Science, EarlyView.
We demonstrate programmable structural symmetry and emission in benzylammonium‐based low‐dimensional hybrid perovskites. Continuous shaking transforms orthorhombic platelets into a lower‐symmetry monoclinic phase with broadband emission, whereas thermal activation drives the reverse pathways toward a higher‐symmetry configuration resembling the ...
Luiz G. Bonato, Sirous Khabbaz Abkenar, Balaji Dhanabalan, Quentin Evrard, Luca Goldoni, Sergio Marras, Giorgio Divitini, Milena P. Arciniegas   +7 more
wiley   +1 more source

Ultrafast RIXS of orbital-resolved valence-band reshaping in photoexcited graphite. [PDF]

Sci Adv
Malvestuto M, Caretta A, Laterza S, Bhardwaj R, Volpato B, Babici E, Brondin CA, Manfredda M, Simoncig A, Zangrando M, Demidovich A, Susnjar P, Allaria EM, Brynes AD, Garzella D, Giannessi L, Ribič PR, Sottocorona F, Zamolo M, Hervat A, Gessini A, Parmigiani F, Novko D, Richter E, Maurer B, Draxl C.   +25 more
europepmc   +1 more source

Millisecond Spin Relaxation Times of Distinct Electron and Hole Subensembles in MAxFA1−xPbI3 Perovskite Crystals

Advanced Science, EarlyView.
Mixed‐cation MAx${\rm MA}_x$ FA1−x${\rm FA}_{1-x}$ PbI3${\rm PbI}_3$ perovskite crystals reveal multiple discrete electron and hole spin subensembles associated with distinct localization environments. Optically detected magnetic resonance combined with resonant spin inertia uncovers carriers spin relaxation times reaching 2 ms and identifies nuclear ...
Rongrong Hu, Sergey R. Meliakov, Dmitri R. Yakovlev, Bekir Turedi, Maksym V. Kovalenko, Manfred Bayer, Vasilii V. Belykh   +6 more
wiley   +1 more source

Coordinated Electronic-Transport Regulation and Multiscale Phonon Scattering in Sb-La Co-Doped GeTe. [PDF]

Adv Sci (Weinh)
Lu T, Ma H, Li M, Hong M.
europepmc   +1 more source

Green and Scalable Synthesis of Efficient and Stable CsPbBr3 Perovskite Quantum Dots Enables Low‐Threshold Amplified Spontaneous Emission

Advanced Science, EarlyView.
Green and scalable synthesis of CsPbBr3 perovskite quantum dots using bio‐sourced lecithin and hexane enables single‐batch production over 10 grams. Suppressed Auger recombination and electron‐phonon coupling yields 95% PLQY, enhanced stability, and low ASE thresholds of 230.4 (ns) and 50.1 (fs) µJ cm−2 in neat films. ABSTRACT Halide perovskite quantum
Yongfeng Liu, Mengting Zhang, Qingyu Xie, Kehao Hu, Bowen Zhang, Zhe Zhang, Jie Yang, Zhiping Hu, Juan Du, Jia Wang, Min Zhou   +10 more
wiley   +1 more source

Vorticity-induced short-range ordering for heat insulation in anisotropically bonded CsAg₂I₃. [PDF]

Nat Commun
Bai Q, Yang L, Chen Z, Li C, Cheng R, Shu M, Zhu J, Liu Z, Yang Y, Yang J, Ren J, Voneshen D, Asai S, Masuda T, Sarker S, Zhang Y, Wu J, Tan PH, Chen Y, Ma J, Pei Y.   +20 more
europepmc   +1 more source

Unraveling Hierarchical B‐Site Ordering: Mechanism of Microwave Dielectric Enhancement in Complex Perovskite Oxide Ceramics

Advanced Science, EarlyView.
This study maps out the hierarchical ordering in 1:2 B‐site complex perovskite ceramics using a comprehensive multiscale characterization route. It turns out that intradomain strain, oxygen vacancies, and Mg disorder within the ordered domains act as strong phonon scatterers.
Qingqiao Fu, Hui Gu, Hanbin Gao, Pianpian Ma, Xiangming Chen, Juanjuan Xing, Qiang Zheng   +6 more
wiley   +1 more source

Phonon Transport Mechanism of Strain-Enhanced Lattice Thermal Conductivity in Penta-NiAs₂ Monolayer. [PDF]

Nanomaterials (Basel)
Zeng Y, Zheng H, Xu L, Wang W, Chen Y, Pu L, Li C, Sui H, Lan Y, Zhang H.   +9 more
europepmc   +1 more source

Phonon‐Driven Tetrahedral Tilts Enable Ultralow Bulk Thermal Expansion and Interstitial Oxide‐Ion Migration in Phenacite Solid Electrolytes

Advanced Science, EarlyView.
This work demonstrates a design paradigm of phonon‐driven negative‐thermal‐expansion (NTE) flexible framework that exploits the intrinsic lattice flexibility of NTE frameworks to simultaneously suppress thermal expansion and activate oxide‐ion conduction, offering a promising strategy to mitigate TEC mismatch in solid‐state ionic devices.
Xiaohui Li, Lu liang, Qilong Shi, Xiaoge Wang, Cheng Li, Sihao Deng, Lunhua He, Qiang Li, Kun Lin, Xianran Xing, Xiaojun Kuang   +10 more
wiley   +1 more source

Coherent phonon-driven band renormalizations in 1<i>T'</i>-MoTe₂. [PDF]

Struct Dyn
Jensen CE, Emeis C, Jauernik S, Hein P, Caruso F, Bauer M.   +5 more
europepmc   +1 more source