Physics
Welcome to the research outputs of the University of Exeter College of Engineering, Mathematics and Physical Sciences, Department of Physics
Recent Submissions
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Caveolae in Rabbit Ventricular Cardiomyocytes: Distribution and Dynamic Diminution after Cell Isolation
(Biophysical Society, 2017)Introduction: Caveolae are signal transduction centres, yet their subcellular distribution and preservation in cardiac myocytes after cell-isolation are not well documented. Here, we quantify caveolae, located within 100 ... -
Broadband conversion of microwaves into propagating spin waves in patterned magnetic structures
(AIP Publishing, 2017)Abstract We have used time-resolved scanning Kerr microscopy (TRSKM) and micromagnetic simulations to demonstrate that, when driven by spatially uniform microwave field, the edges of patterned magnetic ... -
Imaging microscopic distribution of antifungal agents in dandruff treatments with stimulated Raman scattering microscopy
(Society of Photo-optical Instrumentation Engineers (SPIE), 2017-06-09)Treatment of dandruff condition usually involves use of antidandruff shampoos containing antifungal agents. Different antifungal agents show variable clinical efficacy based on their cutaneous distribution and bioavailability. ... -
Fast and Highly Sensitive Ionic-Polymer-Gated WS2 -Graphene Photodetectors
(Wiley, 2017-04-18)The combination of graphene with semiconductor materials in heterostructure photodetectors enables amplified detection of femtowatt light signals using micrometer-scale electronic devices. Presently, long-lived charge traps ... -
Localization of massless Dirac particles via spatial modulations of the Fermi velocity
(IOP Publishing, 2017-07-07)The electrons found in Dirac materials are notorious for being difficult to manipulate due to the Klein phenomenon and absence of backscattering. Here we investigate how spatial modulations of the Fermi velocity in ... -
Observing a quantum Maxwell demon at work
(National Academy of Sciences, 2017-07-03)In apparent contradiction to the laws of thermodynamics, Maxwell’s demon is able to cyclically extract work from a system in contact with a thermal bath exploiting the information about its microstate. The resolution ... -
Towards conductive textiles: coating polymeric fibres with graphene
(Springer Nature, 2017-06-26)Conducting fibres are essential to the development of e-textiles. We demonstrate a method to make common insulating textile fibres conductive, by coating them with graphene. The resulting fibres display sheet resistance ... -
Theoretical and experimental exploration of finite sample size effects on the propagation of surface waves supported by slot arrays - dataset
(American Physical Society, 2017-06-07)The propagation of surface waves supported by a finite array of slots perforated on a zero thickness perfect electrically conducting screen is studied both experimentally and theoretically. To generate numerical results, ... -
Theoretical and experimental exploration of finite sample size effects on the propagation of surface waves supported by slot arrays
(American Physical Society, 2017-06-22)The propagation of surface waves supported by a finite array of slots perforated on a zero thickness perfect electrically conducting screen is studied both experimentally and theoretically. To generate numerical results, ... -
Entropy production and time asymmetry in the presence of strong interactions
(American Physical Society, 2017-06-19)It is known that the equilibrium properties of open classical systems that are strongly coupled to a heat bath are described by a set of thermodynamic potentials related to the system's Hamiltonian of mean force. By adapting ... -
Observation of photonic Fermi arcs in topological metamaterials (Dataset)
(Nature, 2017)The discovery of topological phases introduces new perspectives and platforms for various interesting physics originally investigated in quantum context and then, on an equal footing, in classic wave systems, such as ... -
High-performance versatile setup for simultaneous Brillouin-Raman micro-spectroscopy
(American Physical Society, 2017)Brillouin and Raman scattering spectroscopy are established techniques for the nondestructive contactless and label-free readout of mechanical, chemical and structural properties of condensed matter. Brillouin-Raman ... -
HARPS3 for a roboticized Isaac Newton telescope
(Society of Photo-optical Instrumentation Engineers (SPIE), 2016)We present a description of a new instrument development, HARPS3, planned to be installed on an upgraded and roboticized Isaac Newton Telescope by end-2018. HARPS3 will be a high resolution (R = 115,000) echelle spectrograph ... -
The stellar association around Gamma Velorum and its relationship with Vela OB2
(Oxford University Press (OUP) / Royal Astronomical Society, 2009-02-01)We present the results of a photometric BVI survey of 0.9deg<SUP>2</SUP> around the Wolf-Rayet binary gamma<SUP>2</SUP> Vel and its early-type common proper motion companion gamma<SUP>1</SUP> Vel (together referred to as ... -
The effect of unresolved contaminant stars on the cross-matching of photometric catalogues
(Oxford University Press (OUP) / Royal Astronomical Society, 2017-07)A fundamental process in astrophysics is the matching of two photometric catalogues. It is crucial that the correct objects be paired, and that their photometry does not suffer from any spurious additional flux. We compare ... -
An eclipse of the X-ray flux from the dwarf nova OY Carinae in quiescence
(Oxford University Press (OUP) / Royal Astronomical Society, 1999-08-01)We present a phase-resolved ROSAT HRI X-ray light curve of the dwarf nova OY Car in quiescence. The X-ray flux is eclipsed at the same time as the optical eclipse of the primary, and the region of X -ray emission is ... -
The X-ray source population of the globular cluster M15: Chandra high-resolution imaging
(Oxford University Press (OUP) / Royal Astronomical Society, 2005-02-01)The globular cluster M15 was observed on three occasions with the High Resolution Camera on-board Chandra in 2001 in order to investigate the X-ray source population in the cluster centre. After subtraction of the two ... -
Extreme value statistics for two-dimensional convective penetration in a pre-Main Sequence star
(EDP Sciences for European Southern Observatory (ESO), 2017)We examine a penetration layer formed between a central radiative zone and a large convection zone in the deep interior of a young low-mass star. Using the Multidimensional Stellar Implicit Code (MUSIC) to simulate ... -
Pair states in one-dimensional Dirac systems
(American Physical Society, 2017-06-13)Analytic solutions of the quantum relativistic two-body problem are obtained for an interaction potential modeled as a one-dimensional smooth square well. Both stationary and moving pairs are considered and the limit of ... -
Radiation-hydrodynamical simulations of massive star formation using Monte Carlo radiative transfer II. The formation of a 25 solar-mass star
(Oxford University Press (OUP), 2017)We present a numerical simulation of the formation of a massive star using Monte- Carlo-based radiation hydrodynamics (RHD). The star forms via stochastic disc ac- cretion and produces fast, radiation-driven bipolar ...