Results 81 to 90 of about 9,826 (198)

THz‐Driven Coherent Phonon Fingerprints of Hidden Symmetry Breaking in 2D Layered Hybrid Perovskites

Advanced Materials, Volume 38, Issue 4, 16 January 2026.
Intense THz pulses are employed to drive coherent phonons in 2D Ruddlesden‐Popper hybrid metal‐halide perovskites (HOIPs) from the (PEA)2(MA)n‐1PbnI3n+1 family, revealing mode‐selective spectroscopic signatures of inversion symmetry breaking in those nominally centrosymmetric materials. These findings provide a handle to decode nonlinear phonon driving
Joanna M. Urban, Michael S. Spencer, Maximilian Frenzel, Gaëlle Trippé‐Allard, Marie Cherasse, Charlotte Berrezueta‐Palacios, Prakriti P. Joshi, Alexander P. Fellows, Olga Minakova, Eduardo B. Barros, Luca Perfetti, Stephanie Reich, Martin Wolf, Emmanuelle Deleporte, Sebastian F. Maehrlein   +14 more
wiley   +1 more source

New DNLS Equations for Anharmonic Vibrational Impurities

, 2002
We examine some new DNLS-like equations that arise when considering strongly-coupled electron-vibration systems, where the local oscillator potential is anharmonic.
Chen D., M. I. MOLINA
core   +1 more source

Tailoring Optical and Vibrational Properties by Bond Confinement: The Case of Metavalent Chalcogenide and Pnictogen Thin Films

Advanced Optical Materials, Volume 14, Issue 3, 19 January 2026.
This perspective explores how intrinsic confinement effects in metavalent chalcogenide and pnictogen thin films alter optical and vibrational properties. By comparing thickness‐dependent effects across prototypical systems, this work highlights the role of unconventional bonding in shaping coherent phonon dynamics and dielectric functions, offering new
Felix Hoff, Matthias Wuttig
wiley   +1 more source

Nonlinear Dynamical Analysis on the Formation of Cadmium Oxide by Laser Deposition

East European Journal of Physics, 2019
It is well-known that II-VI compounds occupy a very relevant place in the whole context of semiconductors. In particular, II-VI semiconductor and isolating or quasi-isolating oxides play an important role. Among these materials, we can mention zinc oxide
M. A. Grado-Caffaro, M. Grado-Caffaro
doaj   +1 more source

Quantum dynamics of vibrational energy flow in oscillator chains driven by anharmonic interactions

New Journal of Physics, 2020
A new model of vibrational energy transfer in molecular systems taking into account anharmonic (third order) interactions of localized vibrations with a chain of harmonic oscillators is developed.
Raffaele Borrelli, Maxim F Gelin
doaj   +1 more source

Quantum Jumps in Amplitude Bistability: Tracking a Coherent and Invertible State Localization

Annalen der Physik, Volume 538, Issue 1, January 2026.
A notable asymmetry is shown to characterize the bistable switching between macroscopic metastable states of light in the strong‐coupling limit of radiation–matter interaction. Transitions from the vacuum to a highly excited state correlate with a highly bunched sequence of emitted photons, while a downward switch to the vacuum involves a coherent ...
Th. K. Mavrogordatos
wiley   +1 more source

Test of variational approximation for $phi^4$ quantum chain by Monte Carlo simulation

, 1994
We report results of a Monte Carlo simulation of the $\phi^4$ quantum chain. In order to enhance the efficiency of the simulation we combine multigrid simulation techniques with a refined discretization scheme.
Barker, Berne, Creutz, Cuccoli, Cuccoli, De Raedt, Doll, Feynman, Flach, Giachetti, Giachetti, Giachetti, Giachetti, Goodman, Goodman, Hackbusch, Herman, Janke, Janke, Janke, Janke, Kandel, Kandel, Kleinert, Kleinert, Li, Mack, Mack, Sazaki, Sazaki, Scalapino, Schneider, Takahashi, Takahashi, Takayama, Tilman Sauer, Wolfhard Janke, Wouters   +37 more
core   +1 more source

Time‐Domain Visualization of Electron‐Phonon Coupling in Nanographenes

Small Methods, Volume 10, Issue 2, 22 January 2026.
Impulsive vibrational spectroscopy, Raman spectroscopy, and density functional theory calculations are gathered together to unveil elusive low‐frequency collective vibrational modes in dibenzo[hi,st]ovalene nanographenes, enabling the detailed comparison between vibrational modes in derivatives with different peripheral groups.
Rafael Muñoz‐Mármol, Saurav Raj, Mattia Russo, Gianluca Serra, Hao Zhao, Giacomo Bassi, Andrea Lucotti, Francesco Scotognella, Giulio Cerullo, Guglielmo Lanzani, Matteo Tommasini, Margherita Maiuri, Akimitsu Narita, Giuseppe Maria Paternò   +13 more
wiley   +1 more source

Infrared Spectroscopy as a Promising Tool for Diagnosing and Typing Human Pathogenic Fungi

Mycoses, Volume 69, Issue 1, January 2026.
ABSTRACT Fungal infections are increasingly recognised as a global health challenge, responsible for millions of cases annually and substantial mortality, especially in immunocompromised individuals. Yet, the diagnosis of these infections remains notoriously difficult, often delayed by slow culture‐based methods or hindered by the high cost and ...
Anthony G. J. Medeiros, Ayrton L. F. Nascimento, Luana Rossato, Daniel Assis Santos, Nalu Teixeira de Aguiar Peres, Reginaldo Goncalves de Lima Neto, Jacques F. Meis, Kássio M. G. Lima, Rafael Wesley Bastos   +8 more
wiley   +1 more source

Stress distribution and the fragility of supercooled melts

, 2010
We formulate a minimal ansatz for local stress distribution in a solid that includes the possibility of strongly anharmonic short-length motions. We discover a broken-symmetry metastable phase that exhibits an aperiodic, frozen-in stress distribution ...
Abramowitz A., Angell C. A., Bales G. S., Casalini R., Cochran W., Grannan E. R., Hall R., Hall R. W., Johari G. P., Kirkpatrick T. R., Kirkpatrick T. R., Kirkpatrick T. R., Landau L. D., Lindemann F. A., Loidl A., Lookman T., Lubchenko V., Lubchenko V., Lubchenko V., Lubchenko V., Lubchenko V., Lubchenko V., Luttinger J. M., Mandel J., Martinez L.-M., Mehrabadi M. M., Monasson R., Nobre F. D., Novikov V. N., Novikov V. N., Rowlinson J. S., Schmalian J., Singh Y., Sokolov A. P., Stevenson J., Stevenson J. D., Torchinsky D. H., Turnbull D., Usatenko Z. E., Xia X., Yannopoulos N., Yu C. C.   +41 more
core   +1 more source