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The interaction of quantum well excitons with evanescent EM waves and the spectroscopy of waveguide polaritons (2005)
Presentation / Conference Contribution
Beggs, D., Kaliteevski, M., Brand, S., Abram, R., & Kavokin, A. (2005). The interaction of quantum well excitons with evanescent EM waves and the spectroscopy of waveguide polaritons. In J. Menéndez, & C. G. Van de Walle (Eds.), . https://doi.org/10.1063/1.1994526

A transfer matrix method has been used to calculate the dispersion relations of planar dielectric waveguides (WGs) containing quantum well (QW) excitons. It is found that WG polaritons are formed, whose dispersion displays the classic anti-crossing b... Read More about The interaction of quantum well excitons with evanescent EM waves and the spectroscopy of waveguide polaritons.

First-principles calculations of 2×2 reconstructions of GaN surfaces (2005)
Presentation / Conference Contribution
Salinero, V., Gibson, M., Brand, S., Clark, S., & Abram, R. (2005). First-principles calculations of 2×2 reconstructions of GaN surfaces. In J. Menéndez, & C. G. Van de Walle (Eds.), . https://doi.org/10.1063/1.1994143

e GaN and other group III nitrides have great importance in a wide range of technological applications. Difficulty in growing good quality epitaxial GaN currently prevents the full technological potential of this material. The ab initio studies prese... Read More about First-principles calculations of 2×2 reconstructions of GaN surfaces.

Electroluminescence of Tetradentate Pt(II) Complexes: O^N^N^O versus C^N^N^O Coordination (2023)
Journal Article
Pander, P., *Gomes Franca, L., Dias, F. B., & Kozhevnikov, V. N. (2023). Electroluminescence of Tetradentate Pt(II) Complexes: O^N^N^O versus C^N^N^O Coordination. Inorganic Chemistry, 62(14), https://doi.org/10.1021/acs.inorgchem.3c00364

Alkylation of one of the phenolic hydroxyl groups in a salen-type tetradentate ligand changes the coordination mode from O^N^N^O to the cyclometallating C^N^N^O type. The ligand was used to synthesize a new cyclometalated luminescent Pt(II) complex 2... Read More about Electroluminescence of Tetradentate Pt(II) Complexes: O^N^N^O versus C^N^N^O Coordination.

Twist-induced interlayer charge buildup in a WS2 bilayer revealed by electron Compton scattering and density functional theory (2023)
Journal Article
Talmantaite, A., Xie, Y., Cohen, A., Mohapatra, P., Ismach, A., Mizoguchi, T., …Mendis, B. (2023). Twist-induced interlayer charge buildup in a WS2 bilayer revealed by electron Compton scattering and density functional theory. Physical Review B, 107(23), Article 235424. https://doi.org/10.1103/physrevb.107.235424

Exotic properties emerge from the electronic structure of few-layer transition-metal dichalcogenides (TMDs), such as direct band gaps in monolayers and moiré excitons in twisted bilayers, which are exploited in modern optoelectronic devices and twist... Read More about Twist-induced interlayer charge buildup in a WS2 bilayer revealed by electron Compton scattering and density functional theory.

The death of the short-form physics essay in the coming AI revolution (2023)
Journal Article
Yeadon, W., Inyang, O., Mizouri, A., Peach, A., & Testrow, C. P. (2023). The death of the short-form physics essay in the coming AI revolution. Physics Education, 58(3), https://doi.org/10.1088/1361-6552/acc5cf

The latest AI language modules can produce original, high quality full short-form (300-word) Physics essays within seconds. These technologies such as ChatGPT and davinci-003 are freely available to anyone with an internet connection. In this work, w... Read More about The death of the short-form physics essay in the coming AI revolution.

Muon-spin relaxation investigation of magnetic bistability in a crystalline organic radical compound (2023)
Journal Article
Hernández-Melían, A., Huddart, B., Pratt, F., Blundell, S., Mills, M., Young, H., …Lancaster, T. (2023). Muon-spin relaxation investigation of magnetic bistability in a crystalline organic radical compound. Journal of Physics and Chemistry of Solids, 181, https://doi.org/10.1016/j.jpcs.2023.111493

We present the results of a muon-spin relaxation (𝜇+SR) investigation of the crystalline organic radicalcompound 4-(2-benzimidazolyl)-1,2,3,5-dithiadiazolyl (HbimDTDA), in which we demonstrate the hystereticmagnetic switching of the system that takes... Read More about Muon-spin relaxation investigation of magnetic bistability in a crystalline organic radical compound.

Three-dimensional tomographic imaging of the magnetization vector field using Fourier transform holography (2023)
Journal Article
Di Pietro Martínez, M., Wartelle, A., Herrero Martínez, C., Fettar, F., Blondelle, F., Motte, J., …Beutier, G. (2023). Three-dimensional tomographic imaging of the magnetization vector field using Fourier transform holography. Physical Review B, 107(9), Article 094425. https://doi.org/10.1103/physrevb.107.094425

In recent years, interest in expanding from 2D to 3D systems has grown in the magnetism community, from exploring new geometries to broadening the knowledge on the magnetic textures present in thick samples, and with this arises the need for new char... Read More about Three-dimensional tomographic imaging of the magnetization vector field using Fourier transform holography.

Many-body quantum muon effects and quadrupolar coupling in solids (2023)
Journal Article
Gomilšek, M., Pratt, F. L., Cottrell, S. P., Clark, S. J., & Lancaster, T. (2023). Many-body quantum muon effects and quadrupolar coupling in solids. Communications Physics, 6(1), https://doi.org/10.1038/s42005-023-01260-7

Strong quantum zero-point motion (ZPM) of light nuclei and other particles is a crucial aspect of many state-of-the-art quantum materials. However, it has only recently begun to be explored from an ab initio perspective, through several competing app... Read More about Many-body quantum muon effects and quadrupolar coupling in solids.

A “Phase Scrambling” Algorithm for Parallel Multislice Simulation of Multiple Phonon and Plasmon Scattering Configurations (2023)
Journal Article
Mendis, B. G. (2023). A “Phase Scrambling” Algorithm for Parallel Multislice Simulation of Multiple Phonon and Plasmon Scattering Configurations. Microscopy and Microanalysis, 29(3), 1111-1123. https://doi.org/10.1093/micmic/ozad052

Multislice simulations of 4D scanning transmission electron microscopy (4D STEM) data are computationally demanding due to the large number of STEM probe positions that must be calculated. For accurate analysis, inelastic scattering from phonons and... Read More about A “Phase Scrambling” Algorithm for Parallel Multislice Simulation of Multiple Phonon and Plasmon Scattering Configurations.

An Analysis of the Toxicity, Antioxidant, and Anti-Cancer Activity of Cinnamon Silver Nanoparticles in Comparison with Extracts and Fractions of Cinnamomum Cassia at Normal and Cancer Cell Levels (2023)
Journal Article
El-Baz, Y., Moustafa, A., Ali, M., El-Desoky, G., Wabaidur, S., & Faisal, M. (2023). An Analysis of the Toxicity, Antioxidant, and Anti-Cancer Activity of Cinnamon Silver Nanoparticles in Comparison with Extracts and Fractions of Cinnamomum Cassia at Normal and Cancer Cell Levels. Nanomaterials, 13(5), Article 945. https://doi.org/10.3390/nano13050945

In this work, the extract of cinnamon bark was used for the green synthesis of cinnamon-Ag nanoparticles (CNPs) and other cinnamon samples, including ethanolic (EE) and aqueous (CE) extracts, chloroform (CF), ethyl acetate (EF), and methanol (MF) fra... Read More about An Analysis of the Toxicity, Antioxidant, and Anti-Cancer Activity of Cinnamon Silver Nanoparticles in Comparison with Extracts and Fractions of Cinnamomum Cassia at Normal and Cancer Cell Levels.

Bubble Formation in Magma (2023)
Journal Article
Gardner, J. E., Wadsworth, F. B., Carley, T. L., Llewellin, E. W., Kusumaatmaja, H., & Sahagian, D. (2023). Bubble Formation in Magma. Annual Review of Earth and Planetary Sciences, 51(1), 131-154. https://doi.org/10.1146/annurev-earth-031621-080308

Volcanic eruptions are driven by bubbles that form when volatile species exsolve from magma. The conditions under which bubbles form depend mainly on magma composition, volatile concentration, presence of crystals, and magma decompression rate. These... Read More about Bubble Formation in Magma.

DFT + μ: Density functional theory for muon site determination (2023)
Journal Article
Blundell, S., & Lancaster, T. (2023). DFT + μ: Density functional theory for muon site determination. Applied Physics Reviews, 10(2), Article 021316. https://doi.org/10.1063/5.0149080

The technique of muon spin rotation (μSR) has emerged in the last few decades as one of the most powerful methods of obtaining local magnetic information. To make the technique fully quantitative, it is necessary to have an accurate estimate of where... Read More about DFT + μ: Density functional theory for muon site determination.

Azaborine as a Versatile Weak Donor for Thermally Activated Delayed Fluorescence (2023)
Journal Article
Sudhakar, P., Kuila, S., Stavrou, K., Danos, A., Slawin, A. M., Monkman, A., & Zysman-Colman, E. (2023). Azaborine as a Versatile Weak Donor for Thermally Activated Delayed Fluorescence. ACS Applied Materials and Interfaces, 15(21), 25806-25818. https://doi.org/10.1021/acsami.3c05409

Extensive research has been devoted to the development of thermally activated delayed fluorescence emitters, especially those showing pure-blue emission for use in lighting and fullcolor display applications. Towards that goal, herein we report a nov... Read More about Azaborine as a Versatile Weak Donor for Thermally Activated Delayed Fluorescence.

Model of Friction with Plastic Contact Nudging: Amontons-Coulomb Laws, Aging of Static Friction, and Nonmonotonic Stribeck Curves with Finite Quasistatic Limit (2023)
Journal Article
Fielding, S. M. (2023). Model of Friction with Plastic Contact Nudging: Amontons-Coulomb Laws, Aging of Static Friction, and Nonmonotonic Stribeck Curves with Finite Quasistatic Limit. Physical Review Letters, 130(17), Article 178203. https://doi.org/10.1103/physrevlett.130.178203

We introduce a model of friction between two contacting (stationary or cosliding) rough surfaces, each comprising a random ensemble of polydisperse hemispherical bumps. In the simplest version of the model, the bumps experience on contact with each o... Read More about Model of Friction with Plastic Contact Nudging: Amontons-Coulomb Laws, Aging of Static Friction, and Nonmonotonic Stribeck Curves with Finite Quasistatic Limit.

Conformational, Host, and Vibrational Effects Giving Rise to Dynamic TADF Behavior in the Through-Space Charge Transfer, Triptycene Bridged Acridine-Triazine Donor Acceptor TADF Molecule TpAT-tFFO (2023)
Journal Article
Miranda-Salinas, H., Rodriguez-Serrano, A., Kaminski, J. M., Dinkelbach, F., Hiromichi, N., Kusakabe, Y., …Monkman, A. P. (2023). Conformational, Host, and Vibrational Effects Giving Rise to Dynamic TADF Behavior in the Through-Space Charge Transfer, Triptycene Bridged Acridine-Triazine Donor Acceptor TADF Molecule TpAT-tFFO. Journal of Physical Chemistry C, 127(18), 8607-8617. https://doi.org/10.1021/acs.jpcc.2c07529

We present a joint experimental and theoretical study of the through-space charge transfer (CT) TADF molecule TpAT-tFFO. The measured fluorescence has a singular Gaussian line shape but two decay components, coming from two distinct molecular CT conf... Read More about Conformational, Host, and Vibrational Effects Giving Rise to Dynamic TADF Behavior in the Through-Space Charge Transfer, Triptycene Bridged Acridine-Triazine Donor Acceptor TADF Molecule TpAT-tFFO.

Unexpected Quasi‐Axial Conformer in Thermally Activated Delayed Fluorescence DMAC‐TRZ, Pushing Green OLEDs to Blue (2023)
Journal Article
Stavrou, K., Franca, L. G., Böhmer, T., Duben, L. M., Marian, C. M., & Monkman, A. P. (2023). Unexpected Quasi‐Axial Conformer in Thermally Activated Delayed Fluorescence DMAC‐TRZ, Pushing Green OLEDs to Blue. Advanced Functional Materials, 33(25), Article 2300910. https://doi.org/10.1002/adfm.202300910

Hidden photophysics is elucidated in the very well-known thermally activated delayed fluorescence (TADF) emitter, DMAC-TRZ. A molecule that, based on its structure, is considered not to have more than one structural conformation. However, based on ex... Read More about Unexpected Quasi‐Axial Conformer in Thermally Activated Delayed Fluorescence DMAC‐TRZ, Pushing Green OLEDs to Blue.