Research Repository

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The importance of secondary halos for strong lensing in massive galaxy clusters across redshift (2019)
Journal Article
Li, N., Gladders, M. D., Heitmann, K., Rangel, E. M., Child, H. L., Florian, M. K., …Finkel, H. J. (2019). The importance of secondary halos for strong lensing in massive galaxy clusters across redshift. Astrophysical Journal,

Cosmological cluster-scale strong gravitational lensing probes the mass distribution of the dense cores of massive dark matter halos and the structures along the line of sight from background sources to the observer. It is frequently assumed that the... Read More

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., …Beton, P. H. (in press). Two-Dimensional Diffusion of Excitons in a Perylene Diimide Monolayer Quenched by a Fullerene Heterojunction. Journal of Physical Chemistry C, doi: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

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. doi: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

The molecular-gas properties in the gravitationally lensed merger HATLAS J142935.3-002836 (2019)
Journal Article
Messias, H., Nagar, N., Zhang, Z., Oteo, I., Dye, S., Ibar, E., …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. doi: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

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., …Banaschewski, T. (in press). Amygdalar reactivity is associated with prefrontal cortical thickness in a large population-based sample of adolescents. PLoS ONE,

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

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, doi: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

Enhancing our understanding of small bowel function using modern imaging techniques (2019)
Journal Article
Hoad, C., & Spiller, R. (in press). Enhancing our understanding of small bowel function using modern imaging techniques. Neurogastroenterology and Motility,

Small intestinal function is critical to digestive health and patients believe an abnormal reaction to food is responsible for many of their symptoms. Despite this, our ability to assess disturbed function in clinical practice has been limited, parti... Read More

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, doi: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

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), doi: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

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), doi: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

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), doi: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

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. doi: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

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., …Bayer, M. (2019). Optical excitation of single- and multi-mode magnetization precession in Fe-Ga nanolayers. Physical Review Applied, 11(3), doi: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

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), 063520. doi: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

Dynamics of junctions and the multitension velocity-dependent one-scale model (2019)
Journal Article
Rybak, I., Avgoustidis, A., & Martins, C. (2019). Dynamics of junctions and the multitension velocity-dependent one-scale model. Physical Review D, 99(6), doi:10.1103/physrevd.99.063516

The dynamics of string junctions and their influence on the evolution of cosmic superstring networks are studied in full detail. We review kinematic constraints for colliding strings in a Friedmann-Lemaître-Robertson-Walker background and obtain the... Read More

Stability of scalarized black hole solutions in scalar-Gauss-Bonnet gravity (2019)
Journal Article
Silva, H. O., Macedo, C. F., Sotiriou, T. P., Gualtieri, L., Sakstein, J., & Berti, E. (2019). Stability of scalarized black hole solutions in scalar-Gauss-Bonnet gravity. Physical Review D, 99(6), 1-9. doi:10.1103/physrevd.99.064011

Scalar-tensor theories of gravity where a new scalar degree of freedom couples to the Gauss-Bonnet invariant can exhibit the phenomenon of spontaneous black hole scalarization. These theories admit both the classic black hole solutions predicted by g... Read More

Stable single light bullets and vortices and their active control in cold Rydberg gases (2019)
Journal Article
Bai, Z., Li, W., & Huang, G. (2019). Stable single light bullets and vortices and their active control in cold Rydberg gases. Optica, 6(3), 309-317. doi:10.1364/OPTICA.6.000309

Realizing single light bullets and vortices that are stable in high dimensions is a long-standing goal in the study of nonlinear optical physics. On the other hand, the storage and retrieval of such stable high dimensional optical pulses may offer a... Read More

CO, H 2 O, H 2 O + line and dust emission in a z = 3.63 strongly lensed starburst merger at sub-kiloparsec scales (2019)
Journal Article
Yang, C., Gavazzi, R., Beelen, A., Cox, P., Omont, A., Lehnert, M., …Van Der Werf, P. (2019). CO, H 2 O, H 2 O + line and dust emission in a z = 3.63 strongly lensed starburst merger at sub-kiloparsec scales. Astronomy and Astrophysics, doi:10.1051/0004-6361/201833876

Using the Atacama Large Millimeter/submillimeter Array (ALMA), we report high angular-resolution observations of the redshift z =3.63 galaxy H-ATLAS J083051.0+013224 (G09v1.97), one of the most luminous strongly lensed galaxies discovered by the Hers... Read More

Spatially-offset Raman spectroscopy for monitoring mineralization of bone tissue engineering scaffolds: feasibility study based on phantom samples (2019)
Journal Article
Dooley, M., Prasopthum, A., Liao, Z., Sinjab, F., Mclaren, J., Rose, F. R. A. J., …Notingher, I. (2019). Spatially-offset Raman spectroscopy for monitoring mineralization of bone tissue engineering scaffolds: feasibility study based on phantom samples. Biomedical Optics Express, 10(4), 1678-1690. doi:10.1364/BOE.10.001678

Using phantom samples, we investigated the feasibility of spatially-offset Raman spectroscopy (SORS) as a tool for monitoring non-invasively the mineralization of bone tissue engineering scaffold in-vivo. The phantom samples consisted of 3D-printed s... Read More