Article
Chemistry, Physical
Alexey Akimov
Summary: A novel methodology for direct modeling of long-time scale nonadiabatic dynamics in extended nanoscale and solid-state systems is developed using machine learning models trained directly in the time domain. The importance of using periodic and aperiodic functions to transform time into effective input modes for artificial neural networks is highlighted, along with the significance of conducting extended simulations to gain new insights into excited states photophysics.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Physics, Multidisciplinary
R. L. Willett, K. Shtengel, C. Nayak, L. N. Pfeiffer, Y. J. Chung, M. L. Peabody, K. W. Baldwin, K. W. West
Summary: In this study, we provide experimental evidence for the non-Abelian nature of excitations at v = 7/2 by measuring resistance oscillations in Fabry-Pérot interferometers using new high-purity heterostructures. We also examine the fermion parity of non-Abelian quasiparticles at both v = 5/2 and v = 7/2 for the first time. These findings support the utility of e/4 quasiparticles for topological quantum computation.
Article
Chemistry, Physical
Sarbani Patra, Juan Carlos San Vicente Veliz, Debasish Koner, Evan J. Bieske, Markus Meuwly
Summary: The photodissociation dynamics of N-3(+) excited from its ground state to the first excited singlet and triplet states are investigated. The rotational and vibrational distributions of the N-2 product are determined, and it is found that appreciable angular momentum is generated in the excited states. The lifetimes in the excited states extend to at least 50 ps. Notably, the results obtained from sampling initial conditions from a thermal ensemble and from the Wigner distribution of the ground state wavefunction are comparable.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Yang Luo, Hai Wang, Le-Yi Zhao, Yong-Lai Zhang
Summary: A strong coupled system composed of a MAPbI(x)Cl(3-x) perovskite film and aluminum conical nanopits array has been investigated. Hybrid states formed by surface plasmons and free carriers are observed, showing evidence of the formation of strong coupling states. The Rabi splitting reaches up to 260 meV. The lifetime of the free carrier-surface plasmon hybrid states is slightly shorter than that of the uncoupled perovskite film.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Ashley J. Shin, Azmain A. Hossain, Stephanie M. Tenney, Xuanheng Tan, Lauren A. Tan, Jonathan J. Foley, Timothy L. Atallah, Justin R. Caram
Summary: The study synthesizes MX (M = Cd, Hg; X = Se, Te) NPLs of varying thicknesses and uses the Elliott model to extract exciton binding energies. It reveals that the exciton binding energy is influenced by both internal and external dielectric effects as well as the thickness of the semiconductor material. Experimental results demonstrate that dielectric screening increases the exciton binding energy, emphasizing the significance of surface modification in controlling photophysics and device properties.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Physics, Condensed Matter
M. L. Savchenko, D. A. Kozlov, N. N. Vasilev, N. N. Mikhailov, S. A. Dvoretsky, Z. D. Kvon
Summary: We carried out a systematic study on the transport properties of a 1000 nm HgTe film. The film is expected to be fully relaxed and has the band structure of bulk HgTe with the existence of two-dimensional topological surface states (TSSs). By tuning the top-gate voltage, we could change the dominant transport from electron to hole. The system exhibits Shubnikov-de Haas oscillations and shows multiple independent frequencies in the Fourier spectra.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Multidisciplinary Sciences
David A. Kealhofer, Robert Kealhofer, Daniel Ohara, Tyler N. Pardue, Susanne Stemmer
Summary: A thin film of cadmium arsenide can exhibit the characteristics of a three-dimensional topological insulator, with experimental signatures observed through quantum capacitance. By leveraging the flexibility of heterostructures, researchers have demonstrated a method to control the energy of topological surface states in cadmium arsenide, opening up new avenues for engineering topological insulators based on this material.
Article
Chemistry, Physical
Wen-Han Dong, Yu-Yang Zhang, Yan-Fang Zhang, Jia-Tao Sun, Feng Liu, Shixuan Du
Summary: Using first-principles calculations and theoretical analysis, we predict that van der Waals monolayered transition-metal monohalides MX exhibit 2D superconducting states with remarkable transition temperatures. These materials demonstrate interesting band topology and phononic topology, providing a promising platform for studying superconductivity and nontrivial topological phenomena.
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
A. Singh, H. Y. Huang, Christopher Lane, J. H. Li, J. Okamoto, S. Komiya, Robert S. Markiewicz, Arun Bansil, T. K. Lee, A. Fujimori, C. T. Chen, D. J. Huang
Summary: The layered crystal structures of cuprates exhibit unique charge excitations different from three-dimensional metals. Acoustic plasmons have been observed in electron-doped cuprates, but their existence in hole-doped cuprates is still debated. In this study, resonant inelastic x-ray scattering measurements and calculations were conducted to investigate the charge excitations of hole-doped cuprate La2−xSrxCuO4. The results provide evidence for the acoustic plasmons of Zhang-Rice singlet and suggest that the metallic behavior is attributed to the movement of Zhang-Rice singlet rather than simple hopping of oxygen holes.
Article
Chemistry, Multidisciplinary
Chang Yan, Daniel Weinberg, Dipti Jasrasaria, Matthew A. Kolaczkowski, Zi-jie Liu, John P. Philbin, Arunima D. Balan, Yi Liu, Adam M. Schwartzberg, Eran Rabani, A. Paul Alivisatos
Summary: Understanding electronic dynamics in multiexcitonic quantum dots is crucial for designing efficient systems in high power scenarios like solar concentrators and multielectron charge transfer. By synthesizing a phenothiazine derivative and using transient absorption spectroscopy, the competition between Auger recombination and hole transfer in CdSe, CdS, and CdSe/CdS QDs was investigated, revealing the beneficial role of hole-trapping states in enhancing hole transfer efficiency under multiexcitonic conditions.
Article
Chemistry, Physical
James A. Green, Haritha Asha, Fabrizio Santoro, Roberto Improta
Summary: A new method (FrDEx) is proposed to accurately calculate excitonic Hamiltonians for systems with close chromophores, which can be applied to the study of biological and nanomaterials such as DNA.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2021)
Review
Biotechnology & Applied Microbiology
Hanny Tika Draviana, Istikhori Fitriannisa, Muhamad Khafid, Dyah Ika Krisnawati, Widodo, Chien-Hung Lai, Yu-Jui Fan, Tsung-Rong Kuo
Summary: Metal nanoclusters (NCs) show promise as antibacterial agents due to their small size and controlled surface properties. This review summarizes the impacts of NC size and surface charge on antibacterial mechanisms and interactions with bacteria, providing insights for the design and synthesis of effective antibacterial agents.
JOURNAL OF NANOBIOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Paulina Majchrzak, Sahar Pakdel, Deepnarayan Biswas, Alfred J. H. Jones, Klara Volckaert, Igor Markovic, Federico Andreatta, Raman Sankar, Chris Jozwiak, Eli Rotenberg, Aaron Bostwick, Charlotte E. Sanders, Yu Zhang, Gabriel Karras, Richard T. Chapman, Adam Wyatt, Emma Springate, Jill A. Miwa, Philip Hofmann, Phil D. C. King, Nicola Lanata, Young Jun Chang, Soren Ulstrup
Summary: Researchers perturb the electronic and vibrational states in a three-dimensional charge density wave material using an intense infrared laser pulse, and observe the light-induced hot carrier dynamics utilizing time- and angle-resolved photoemission spectroscopy. They find that the presence of hot carriers alters the phonon dispersion and leads to a new quasi-equilibrium state.
Article
Chemistry, Physical
Zahra Jamshidi, Narges Asadi-Aghbolaghi, Razieh Morad, Erfan Mahmoudi, Souloke Sen, Malik Maaza, Lucas Visscher
Summary: In the field of quantum plasmonics, plasmonic excitations of silver and gold nanoparticles are used to manipulate light-matter interactions at the nanoscale. This study investigates the effects of varying the separation distance between two nanoparticles on plasmonic excitations using tight-binding approximations and time-dependent density functional theory.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Yi Zeng, Yingli Niu, Qian Peng, Xiaoyan Zheng
Summary: This study investigates the mechanism behind the nonmonotonic variation of luminescence efficiency in organic molecules under extra pressure. The results suggest that the change in radiative decay rate constant and nonradiative decay rate constant is responsible for the observed variation.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Optics
M. S. Brodyn, V. I. Volkov, V. I. Rudenko, V. R. Liakhovetskyi, A. O. Borshch
JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS
(2017)
Article
Nanoscience & Nanotechnology
Andrii V. Uklein, Volodymyr V. Multian, Bogdan V. Oliinyk, Volodymyr V. Doroshchuk, Sergei A. Alekseev, Volodymyr V. Lysenko, Mykhailo S. Brodyn, Volodymyr Ya. Gayvoronsky
NANOSCALE RESEARCH LETTERS
(2017)
Article
Nanoscience & Nanotechnology
Andrii V. Uklein, Volodymyr V. Multian, Bogdan V. Oliinyk, Volodymyr V. Doroshchuk, Sergei A. Alekseev, Volodymyr V. Lysenko, Mykhailo S. Brodyn, Volodymyr Ya. Gayvoronsky
NANOSCALE RESEARCH LETTERS
(2017)
Article
Spectroscopy
N. V. Bondar, M. S. Brodyn, N. A. Matveevskaya
JOURNAL OF APPLIED SPECTROSCOPY
(2018)
Article
Physics, Applied
N. V. Bondar, M. S. Brodyn, N. A. Matveevskaya
LOW TEMPERATURE PHYSICS
(2018)
Article
Physics, Condensed Matter
N. V. Bondar, M. S. Brodyn, N. A. Matveevskaya, T. G. Beynik
Article
Materials Science, Characterization & Testing
N. V. Bondar, V. V. Astanin
STRENGTH OF MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
M. S. Brodyn, V. Ya Degoda, M. Alizadeh, B. Kozhushko, G. P. Podust, N. Yu Pavlova
Article
Physics, Condensed Matter
N. Bondar, M. S. Brodyn, N. A. Matveevskaya, T. G. Beynik
SUPERLATTICES AND MICROSTRUCTURES
(2020)
Article
Physics, Multidisciplinary
N. V. Bondar, M. S. Brodyn, Yu. P. Piryatynskyi, N. A. Matveevskaya
Summary: This study investigates the optical spectra of colloidal solutions and solid films of thioglycerol-stabilized ZnSe NCs. It is found that in solution, relaxation and recombination of excitons through surface and defect states dominate, while in films, quantum channel exciton relaxation is prevalent. Time-resolved measurements reveal rapid transfer of exciton excitation energy from smaller NCs to larger ones in films.
UKRAINIAN JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
N. V. Bondar, M. S. Brodyn, O. V. Tverdokhlibova, N. A. Matveevskaya, T. G. Beynik
UKRAINIAN JOURNAL OF PHYSICS
(2019)