All Outputs (170)

Well-tempered cosmology (2019)
Journal Article
Emond, W. T., Li, C., Saffin, P. M., & Zhou, S.-Y. (2019). Well-tempered cosmology. Journal of Cosmology and Astroparticle Physics, 2019(05), Article 038. https://doi.org/10.1088/1475-7516/2019/05/038

We examine an approach to cosmology, known as Well-Tempering, that allows for a de Sitter phase whose expansion is independent of the cosmological constant. Starting from a generic scalar-tensor theory compatible with the recent gravitational wave ob... Read More about Well-tempered cosmology.

Shear-strain-mediated magnetoelectric effects revealed by imaging (2019)
Journal Article
Ghidini, M., Mansell, R., Maccherozzi, F., Moya, X., Phillips, L. C., Yan, W., Pesquera, D., Barnes, C. H. W., Cowburn, R. P., Hu, J.-M., Dhesi, S. S., & Mathur, N. D. (2019). Shear-strain-mediated magnetoelectric effects revealed by imaging. Nature Materials, 18(8), 840-845. https://doi.org/10.1038/s41563-019-0374-8

Large changes in the magnetization of ferromagnetic films can be electrically driven by non-180° ferroelectric domain switching in underlying substrates, but the shear components of the strains that mediate these magnetoelectric effects have not been... Read More about Shear-strain-mediated magnetoelectric effects revealed by imaging.

Lung Computational Models and the Role of the Small Airways in Asthma (2019)
Journal Article
Foy, B. H., Soares, M., Bordas, R., Richardson, M., Bell, A., Singapuri, A., Hargadon, B., Brightling, C., Burrowes, K., Kay, D., Owers-Bradley, J., & Siddiqui, S. (2019). Lung Computational Models and the Role of the Small Airways in Asthma. American Journal of Respiratory and Critical Care Medicine, 200(8), 982-991. https://doi.org/10.1164/rccm.201812-2322oc

RATIONALE: Asthma is characterised by disease within the small airways. Several studies have suggested that forced oscillation technique derived resistance at 5Hz minus 20Hz (R5-R20) is measure of small airways disease, however there has been limited... Read More about Lung Computational Models and the Role of the Small Airways in Asthma.

Self-interactions and spontaneous black hole scalarization (2019)
Journal Article
Macedo, C. F., Sakstein, J., Berti, E., Gualtieri, L., Silva, H. O., & Sotiriou, T. P. (2019). Self-interactions and spontaneous black hole scalarization. Physical Review D, 99(10), 1-11. https://doi.org/10.1103/physrevd.99.104041

It has recently been shown that nontrivial couplings between a scalar and the Gauss-Bonnet invariant can give rise to black hole spontaneous scalarization. Theories that exhibit this phenomenon are among the leading candidates for testing gravity wit... Read More about Self-interactions and spontaneous black hole scalarization.

DNP-NMR of surface hydrogen on silicon microparticles (2019)
Journal Article
Shimon, D., van Schooten, K. J., Paul, S., Peng, Z., Takahashi, S., Köckenberger, W., & Ramanathan, C. (2019). DNP-NMR of surface hydrogen on silicon microparticles. Solid State Nuclear Magnetic Resonance, 101, 68-75. https://doi.org/10.1016/j.ssnmr.2019.04.008

Dynamic nuclear polarization (DNP) enhanced nuclear magnetic resonance (NMR) offers a promising route to studying local atomic environments at the surface of both crystalline and amorphous materials. We take advantage of unpaired electrons due to def... Read More about DNP-NMR of surface hydrogen on silicon microparticles.

Observational Constraints on the Merger History of Galaxies since z ≈ 6: Probabilistic Galaxy Pair Counts in the CANDELS Fields (2019)
Journal Article
Duncan, K., Conselice, C. J., Mundy, C., Bell, E., Donley, J., Galametz, A., Guo, Y., Grogin, N. A., Hathi, N., Kartaltepe, J., Kocevski, D., Koekemoer, A. M., Pérez-González, P. G., Mantha, K. B., Snyder, G. F., & Stefanon, M. (2019). Observational Constraints on the Merger History of Galaxies since z ≈ 6: Probabilistic Galaxy Pair Counts in the CANDELS Fields. Astrophysical Journal, 876(2), Article 110. https://doi.org/10.3847/1538-4357/ab148a

Galaxy mergers are expected to have a significant role in the mass assembly of galaxies in the early universe, but there are very few observational constraints on the merger history of galaxies at z ≥ 2. We present the first study of galaxy major mer... Read More about Observational Constraints on the Merger History of Galaxies since z ≈ 6: Probabilistic Galaxy Pair Counts in the CANDELS Fields.

Amygdalar reactivity is associated with prefrontal cortical thickness in a large population-based sample of adolescents (2019)
Journal Article
Albaugh, M. D., Hudziak, J., Orr, C., Spechler, P., Chaarani, B., Mackey, S., Lepage, C., Fonov, V., Rioux, P., Evans, A., & Banaschewski, T. (2019). Amygdalar reactivity is associated with prefrontal cortical thickness in a large population-based sample of adolescents. PLoS ONE, 14(5), Article e0216152. https://doi.org/10.1371/journal.pone.0216152

In structural neuroimaging studies, reduced cerebral cortical thickness in orbital and ventromedial prefrontal regions is frequently interpreted as reflecting an impaired ability to downregulate neuronal activity in the amygdalae. Unfortunately, litt... Read More about Amygdalar reactivity is associated with prefrontal cortical thickness in a large population-based sample of adolescents.

Two-Dimensional Diffusion of Excitons in a Perylene Diimide Monolayer Quenched by a Fullerene Heterojunction (2019)
Journal Article
Kerfoot, J., Korolkov, V. V., Svatek, S. A., Alkhamisi, M., Taniguchi, T., Watanabe, K., Parkinson, P. W., & Beton, P. H. (2019). Two-Dimensional Diffusion of Excitons in a Perylene Diimide Monolayer Quenched by a Fullerene Heterojunction. Journal of Physical Chemistry C, 123(19), 12249-12254. https://doi.org/10.1021/acs.jpcc.9b01413

The structural and functional properties of organic heterojunctions play a vitally important role in the operation of organic devices, but their properties are difficult to measure directly due to the buried interfaces which are typically formed. We... Read More about Two-Dimensional Diffusion of Excitons in a Perylene Diimide Monolayer Quenched by a Fullerene Heterojunction.

Gauge invariance and the Englert-Brout-Higgs mechanism in non-Hermitian field theories (2019)
Journal Article
Alexandre, J., Ellis, J., Millington, P., & Seynaeve, D. (2019). Gauge invariance and the Englert-Brout-Higgs mechanism in non-Hermitian field theories. Physical Review D, 99(7), 1-9. https://doi.org/10.1103/physrevd.99.075024

We discuss PT-symmetric Abelian gauge field theories as well as their extension to the Englert-Brout-Higgs mechanism for generating a mass for a vector boson. Gauge invariance is not straightforward, and we discuss the different related problems as w... Read More about Gauge invariance and the Englert-Brout-Higgs mechanism in non-Hermitian field theories.

The molecular-gas properties in the gravitationally lensed merger HATLAS J142935.3-002836 (2019)
Journal Article
Messias, H., Nagar, N., Zhang, Z.-Y., Oteo, I., Dye, S., Ibar, E., Timmons, N., Van Der Werf, P., Riechers, D., Eales, S., Ivison, R., Maresca, J., Michalowski, J., & Yang, C. (2019). The molecular-gas properties in the gravitationally lensed merger HATLAS J142935.3-002836. Monthly Notices of the Royal Astronomical Society, 486(2), 2366-2378. https://doi.org/10.1093/mnras/stz945

Follow-up observations of (sub-)mm-selected gravitationally-lensed systems have allowed a more detailed study of the dust-enshrouded phase of star-formation up to very early cosmic times. Here, the case of the gravitationally lensed merger in HATLAS... Read More about The molecular-gas properties in the gravitationally lensed merger HATLAS J142935.3-002836.

Enhanced photoresponse in MoTe2 photodetectors with asymmetric graphene contacts (2019)
Journal Article
Wei, X., Yan, F., Lv, Q., Zhu, W., Hu, C., Patane, A., & Wang, K. (2019). Enhanced photoresponse in MoTe2 photodetectors with asymmetric graphene contacts. Advanced Optical Materials, 7(12), Article 1900190. https://doi.org/10.1002/adom.201900190

Atomically thin two dimensional (2D) materials are promising candidates for miniaturized high-performance optoelectronic devices. Here, we report on multilayer MoTe2 photodetectors contacted with asymmetric electrodes based on n- and p-type graphene... Read More about Enhanced photoresponse in MoTe2 photodetectors with asymmetric graphene contacts.

Planet Four: Craters—Optimizing task workflow to improve volunteer engagement and crater counting performance (2019)
Journal Article
Sprinks, J., Houghton, R., Bamford, S., & Morley, J. G. (2019). Planet Four: Craters—Optimizing task workflow to improve volunteer engagement and crater counting performance. Meteoritics and Planetary Science, 54(6), 1325-1346. https://doi.org/10.1111/maps.13277

Virtual citizen science platforms allow nonscientists to take part in scientific research across a range of disciplines, including planetary science. What is required of the volunteer can vary considerably in terms of task type, variety, judgment req... Read More about Planet Four: Craters—Optimizing task workflow to improve volunteer engagement and crater counting performance.

Ultra-high resolution imaging of thin films and single strands of polythiophene using atomic force microscopy (2019)
Journal Article
Korolkov, V. V., Summerfield, A., Murphy, A., Amabilino, D. B., Watanabe, K., Taniguchi, T., & Beton, P. H. (2019). Ultra-high resolution imaging of thin films and single strands of polythiophene using atomic force microscopy. Nature Communications, 10, Article 1537. https://doi.org/10.1038/s41467-019-09571-6

Real-space images of polymers with sub-molecular resolution could provide valuable insights into the relationship between morphology and functionality of polymer optoelectronic devices, but their acquisition is problematic due to perceived limitation... Read More about Ultra-high resolution imaging of thin films and single strands of polythiophene using atomic force microscopy.

Synchronization transition in the double dimer model on the cubic lattice (2019)
Journal Article
Wilkins, N., & Powell, S. (2019). Synchronization transition in the double dimer model on the cubic lattice. Physical Review B, 99(14), Article 144403. https://doi.org/10.1103/PhysRevB.99.144403

We study the classical cubic-lattice double dimer model, consisting of two coupled replicas of the close-packed dimer model, using a combination of theoretical arguments and Monte Carlo simulations. Our results establish the presence of a 'synchroniz... Read More about Synchronization transition in the double dimer model on the cubic lattice.

Modelling Urban Housing Stocks for Building Energy Simulation using CityGML EnergyADE (2019)
Journal Article
Rosser, J. F., Long, G., Zakhary, S., Boyd, D. S., Mao, Y., & Robinson, D. (2019). Modelling Urban Housing Stocks for Building Energy Simulation using CityGML EnergyADE. ISPRS International Journal of Geo-Information, 8(4), Article 163. https://doi.org/10.3390/ijgi8040163

Understanding the energy demand of a city’s housing stock is an important focus for local and national administrations to identify strategies for reducing carbon emissions. Building energy simulation offers a promising approach to understand energy u... Read More about Modelling Urban Housing Stocks for Building Energy Simulation using CityGML EnergyADE.

Evolution of the galaxy stellar mass functions and UV luminosity functions at z = 6-9 in the Hubble Frontier Fields (2019)
Journal Article
Bhatawdekar, R., Conselice, C. J., Margalef-Bentabol, B., & Duncan, K. (2019). Evolution of the galaxy stellar mass functions and UV luminosity functions at z = 6-9 in the Hubble Frontier Fields. Monthly Notices of the Royal Astronomical Society, 486(3), 3805-3830. https://doi.org/10.1093/mnras/stz866

© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. We present new measurements of the evolution of the galaxy stellar mass functions (GSMFs) and ultraviolet luminosity functions (UV LFs) for galaxie... Read More about Evolution of the galaxy stellar mass functions and UV luminosity functions at z = 6-9 in the Hubble Frontier Fields.

Analog cosmology with two-fluid systems in a strong gradient magnetic field (2019)
Journal Article
Fifer, Z., Torres, T., Erne, S., Avgoustidis, A., Hill, R. J. A., & Weinfurtner, S. (2019). Analog cosmology with two-fluid systems in a strong gradient magnetic field. Physical Review E, 99(3), Article 031101(R). https://doi.org/10.1103/physreve.99.031101

We propose an experiment combining fluid dynamics and strong magnetic field physics to simulate cosmological scenarios. Our proposed system consists of two immiscible, weakly magnetized fluids moved through a strong gradient magnetic field. The diama... Read More about Analog cosmology with two-fluid systems in a strong gradient magnetic field.

Black holes and binary mergers in scalar Gauss-Bonnet gravity: Scalar field dynamics (2019)
Journal Article
Witek, H., Gualtieri, L., Pani, P., & Sotiriou, T. P. (2019). Black holes and binary mergers in scalar Gauss-Bonnet gravity: Scalar field dynamics. Physical Review D, 99(6), 1-24. https://doi.org/10.1103/physrevd.99.064035

We study the nonlinear dynamics of black holes that carry scalar hair and binaries composed of such black holes. The scalar hair is due to a linear or exponential coupling between the scalar and the Gauss-Bonnet invariant. We work perturbatively in t... Read More about Black holes and binary mergers in scalar Gauss-Bonnet gravity: Scalar field dynamics.

Optical excitation of single- and multi-mode magnetization precession in Fe-Ga nanolayers (2019)
Journal Article
Scherbakov, A., Danilov, A., Godejohann, F., Linnik, T., Glavin, B., Shelukhin, L. A., Pattnaik, D., Wang, M., Rushforth, A., Yakovlev, D., Akimov, A., & Bayer, M. (2019). Optical excitation of single- and multi-mode magnetization precession in Fe-Ga nanolayers. Physical Review Applied, 11(3), Article 031003. https://doi.org/10.1103/PhysRevApplied.11.031003

We demonstrate a variety of precessional responses of the magnetization to ultrafast optical excitation in nanolayers of Galfenol (Fe,Ga), which is a ferromagnetic material with large saturation magnetization and enhanced magnetostriction. The partic... Read More about Optical excitation of single- and multi-mode magnetization precession in Fe-Ga nanolayers.

Inflation in loop quantum cosmology (2019)
Journal Article
Bhardwaj, A., Copeland, E. J., & Louko, J. (2019). Inflation in loop quantum cosmology. Physical Review D, 99(6), Article 063520. https://doi.org/10.1103/physrevd.99.063520

We develop a consistent analytic approach to determine the conditions under which slow-roll inflation can arise when the inflaton is the same scalar field that is responsible for the bounce in loop quantum cosmology (LQC). We find that the requiremen... Read More about Inflation in loop quantum cosmology.