All Outputs (235)

Faradaic processes beyond Nernst’s law: density functional theory assisted modelling of partial electron delocalisation and pseudocapacitance in graphene oxides (2017)
Journal Article
Li, J., O'Shea, J. N., Hou, X., & Chen, G. Z. (in press). Faradaic processes beyond Nernst’s law: density functional theory assisted modelling of partial electron delocalisation and pseudocapacitance in graphene oxides. Chemical Communications, 53(75), 10414-10417. https://doi.org/10.1039/C7CC04344A

The study of electron delocalisation in oxygen atom segregated zones in graphene, aided by the first-principles density functional theory, has revealed extra energy bands of ≥ 2 eV wide around the Fermi level, predicting faradaic charge storage occur... Read More about Faradaic processes beyond Nernst’s law: density functional theory assisted modelling of partial electron delocalisation and pseudocapacitance in graphene oxides.

Deterministic control of magnetic vortex wall chirality by electric field (2017)
Journal Article
Beardsley, R., Bowe, S., Parkes, D., Reardon, C., Edmonds, K., Gallagher, B., Cavill, S., & Rushforth, A. (2017). Deterministic control of magnetic vortex wall chirality by electric field. Scientific Reports, 7, Article 7613. https://doi.org/10.1038/s41598-017-07944-9

Concepts for information storage and logical processing based on magnetic domain walls have great potential for implementation in future information and communications technologies. To date, the need to apply power hungry magnetic fields or heat diss... Read More about Deterministic control of magnetic vortex wall chirality by electric field.

Magnetic field tunable vortex diode made of YBa2Cu3O7−δ Josephson junction asymmetrical arrays (2017)
Journal Article
Chesca, B., John, D., Pollett, R., Gaifullin, M., Cox, J., Mellor, C., & Savelev, S. (in press). Magnetic field tunable vortex diode made of YBa2Cu3O7−δ Josephson junction asymmetrical arrays. Applied Physics Letters, 111(6), https://doi.org/10.1063/1.4997741

Several Josephson ratchets designed as asymmetrically structured parallel-series arrays of Josephson junctions made of YBa2Cu3O7−δ have been fabricated. From the current-voltage characteristics measured for various values of applied magnetic field, B... Read More about Magnetic field tunable vortex diode made of YBa2Cu3O7−δ Josephson junction asymmetrical arrays.

Massive post-starburst galaxies at z > 1 are compact proto-spheroids (2017)
Journal Article
Almaini, O., Wild, V., Maltby, D. T., Hartley, W. G., Simpson, C., Hatch, N. A., McLure, R. J., Dunlop, J. S., & Rowlands, K. (2017). Massive post-starburst galaxies at z > 1 are compact proto-spheroids. Monthly Notices of the Royal Astronomical Society, 472(2), 1401-1412. https://doi.org/10.1093/mnras/stx1957

We investigate the relationship between the quenching of star formation and the structural transformation of massive galaxies, using a large sample of photometrically-selected poststarburst galaxies in the UKIDSS UDS field. We find that post-starburs... Read More about Massive post-starburst galaxies at z > 1 are compact proto-spheroids.

The effects of the cluster environment on the galaxy mass-size relation in MACS J1206.2-0847 (2017)
Journal Article
Kuchner, U., Ziegler, B., Verdugo, M., Bamford, S., & Häußler, B. (2017). The effects of the cluster environment on the galaxy mass-size relation in MACS J1206.2-0847. Astronomy and Astrophysics, 604, Article A54. https://doi.org/10.1051/0004-6361/201630252

The dense environment of galaxy clusters strongly influences the nature of galaxies. Their abundance and diversity is imprinted on the stellar-mass–size plane. Here, we study the cause of the size distribution of a sample of 560 spectroscopic members... Read More about The effects of the cluster environment on the galaxy mass-size relation in MACS J1206.2-0847.

Adsorption and charge transfer interactions of bi-isonicotinic acid on Ag(111) (2017)
Journal Article
Temperton, R. H., Gibson, A. J., Handrup, K., & O'Shea, J. N. (in press). Adsorption and charge transfer interactions of bi-isonicotinic acid on Ag(111). Journal of Chemical Physics, 147, https://doi.org/10.1063/1.4996746

The adsorption and charge transfer dynamics of the organic molecule bi-isonicotinic acid (4,4′-dicarboxy-2,2′-bipyridine) on single crystal Ag(111) has been studied using synchrotron radiation-based photoemission, x-ray absorption and resonant core s... Read More about Adsorption and charge transfer interactions of bi-isonicotinic acid on Ag(111).

Characterisation of temperature dependent parameters of multi-quantum well (MQW) Ti/Au/n-AlGaAs/n-GaAs/n-AlGaAs Schottky diodes (2017)
Journal Article
Filali, W., Sengouga, N., Oussalah, S., Mari, R. H., Jameel, D. A., Al Saqri, N. A., Aziz, M., Taylor, D., & Henini, M. (2017). Characterisation of temperature dependent parameters of multi-quantum well (MQW) Ti/Au/n-AlGaAs/n-GaAs/n-AlGaAs Schottky diodes. Superlattices and Microstructures, 111, https://doi.org/10.1016/j.spmi.2017.07.059

Forward and reverse current-voltage (IV) of Ti/Au/n-Al0.33Ga0.67As/n-GaAs/n-Al0.33Ga0.67As multi-quantum well (MQW) Schottky diodes were measured over a range of temperatures from 20 to 400 K by a step of 20 K. The Schottky diodes parameters were the... Read More about Characterisation of temperature dependent parameters of multi-quantum well (MQW) Ti/Au/n-AlGaAs/n-GaAs/n-AlGaAs Schottky diodes.

Self-consistent radiative corrections to false vacuum decay (2017)
Journal Article
Garbrecht, B., & Millington, P. (in press). Self-consistent radiative corrections to false vacuum decay. Journal of Physics: Conference Series, 873, Article 012041. https://doi.org/10.1088/1742-6596/873/1/012041

With the Higgs mass now measured at the sub-percent level, the potential metastability of the electroweak vacuum of the Standard Model (SM) motivates renewed study of false vacuum decay in quantum field theory. In this note, we describe an approach t... Read More about Self-consistent radiative corrections to false vacuum decay.

Light neutrino masses from a non-Hermitian Yukawa theory (2017)
Journal Article
Alexandre, J., Bender, C. M., & Millington, P. (2017). Light neutrino masses from a non-Hermitian Yukawa theory. Journal of Physics: Conference Series, 873, Article 012047. https://doi.org/10.1088/1742-6596/873/1/012047

Working within the context of PT-symmetric quantum mechanics, we begin by describing a non-Hermitian extension of QED that is both Lorentz invariant and consistent with unitarity. We show that the non-Hermitian Dirac mass matrix of this theory exhibi... Read More about Light neutrino masses from a non-Hermitian Yukawa theory.

An atomic carbon source for high temperature molecular beam epitaxy of graphene (2017)
Journal Article
Albar, J., Summerfield, A., Cheng, T. S., Davies, A., Smith, E., Khlobystov, A. N., Mellor, C., Taniguchi, T., Watanabe, K., Foxon, C., Eaves, L., Beton, P. H., & Novikov, S. V. (in press). An atomic carbon source for high temperature molecular beam epitaxy of graphene. Scientific Reports, 7(1), Article 6598. https://doi.org/10.1038/s41598-017-07021-1

We report the use of a novel atomic carbon source for the molecular beam epitaxy (MBE) of graphene layers on hBN flakes and on sapphire wafers at substrate growth temperatures of ~1400 °C. The source produces a flux of predominantly atomic carbon, wh... Read More about An atomic carbon source for high temperature molecular beam epitaxy of graphene.

Recrudescence of massive fermion production by oscillons (2017)
Journal Article
Saffin, P. M. (in press). Recrudescence of massive fermion production by oscillons. Journal of High Energy Physics, 2017(7), Article 126. https://doi.org/10.1007/JHEP07%282017%29126

We bring together the physics of preheating, following a period of inflation, and the dynamics of non-topological solitons, namely oscillons. We show that the oscillating condensate that makes up an oscillon can be an efficient engine for producing h... Read More about Recrudescence of massive fermion production by oscillons.

A mean field model for movement induced changes in the beta rhythm (2017)
Journal Article
Byrne, Á., Brookes, M. J., & Coombes, S. (2017). A mean field model for movement induced changes in the beta rhythm. Journal of Computational Neuroscience, 43(2), https://doi.org/10.1007/s10827-017-0655-7

In electrophysiological recordings of the brain, the transition from high amplitude to low amplitude signals are most likely caused by a change in the synchrony of underlying neuronal population firing patterns. Classic examples of such modulations... Read More about A mean field model for movement induced changes in the beta rhythm.

Supramolecular heterostructures formed by sequential epitaxial deposition of two-dimensional hydrogen-bonded arrays (2017)
Journal Article
Korolkov, V. V., Baldoni, M., Watanabe, K., Taniguchi, T., Besley, E., & Beton, P. H. (2017). Supramolecular heterostructures formed by sequential epitaxial deposition of two-dimensional hydrogen-bonded arrays. Nature Chemistry, 9(12), 1191-1197. https://doi.org/10.1038/nchem.2824

© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Two-dimensional (2D) supramolecular arrays provide a route to the spatial control of the chemical functionality of a surface, but their deposition is in almost all cas... Read More about Supramolecular heterostructures formed by sequential epitaxial deposition of two-dimensional hydrogen-bonded arrays.

Evolution of semilocal string networks: II. Velocity estimators (2017)
Journal Article
Lopez-Eiguren, A., Urrestilla, J., Achúcarro, A., Avgoustidis, A., & Martins, C. (2017). Evolution of semilocal string networks: II. Velocity estimators. Physical Review D, 96, Article 023526. https://doi.org/10.1103/PhysRevD.96.023526

We continue a comprehensive numerical study of semilocal string networks and their cosmological evolution. These can be thought of as hybrid networks comprised of (non-topological) string segments, whose core structure is similar to that of Abelian H... Read More about Evolution of semilocal string networks: II. Velocity estimators.

An intra-neural microstimulation system for ultra-high field magnetic resonance imaging and magnetoencephalography (2017)
Journal Article
Glover, P. M., Watkins, R. H., O’Neill, G. C., Ackerley, R. M., Sánchez-Panchuelo, R.-M., McGlone, F., Brookes, M. J., Wessberg, J., & Francis, S. T. (2017). An intra-neural microstimulation system for ultra-high field magnetic resonance imaging and magnetoencephalography. Journal of Neuroscience Methods, 290, 69-78. https://doi.org/10.1016/j.jneumeth.2017.07.016

Background

Intra-neural microstimulation (INMS) is a technique that allows the precise delivery of low-current electrical pulses into human peripheral nerves. Single unit INMS can be used to stimulate individual afferent nerve fibres during micron... Read More about An intra-neural microstimulation system for ultra-high field magnetic resonance imaging and magnetoencephalography.

First constraints on fuzzy dark matter from Lyman-alpha forest data and hydrodynamical simulations (2017)
Journal Article
Irsic, V., Viel, M., Haehnelt, M. G., Bolton, J. S., & Becker, G. D. (2017). First constraints on fuzzy dark matter from Lyman-alpha forest data and hydrodynamical simulations. Physical Review Letters, 119(3), Article 031302. https://doi.org/10.1103/PhysRevLett.119.031302

We present constraints on the masses of extremely light bosons dubbed fuzzy dark matter from Lyman- α forest data. Extremely light bosons with a De Broglie wavelength of ~ 1 kpc have been suggested as dark matter candidates that may resolve some of t... Read More about First constraints on fuzzy dark matter from Lyman-alpha forest data and hydrodynamical simulations.

New constraints on the free-streaming of warm dark matter from intermediate and small scale Lyman-alpha forest data (2017)
Journal Article
Iršič, V., Viel, M., Haehnelt, M. G., Bolton, J. S., Cristiani, S., Becker, G. D., D'Odorico, V., Cupani, G., Kim, T.-S., Berg, T. A., López, S., Ellison, S., Christensen, L., Denny, K. D., & Worseck, G. (2017). New constraints on the free-streaming of warm dark matter from intermediate and small scale Lyman-alpha forest data. Physical Review D, 96(2), Article 023522. https://doi.org/10.1103/PhysRevD.96.023522

We present new measurements of the free-streaming of warm dark matter (WDM) from Lyman-α flux-power spectra. We use data from the medium resolution, intermediate redshift XQ-100 sample observed with the X-shooter spectrograph (z = 3 – 4.2) and the hi... Read More about New constraints on the free-streaming of warm dark matter from intermediate and small scale Lyman-alpha forest data.

Rapid production of human liver scaffolds for functional tissue engineering by high shear stress oscillation-decellularization (2017)
Journal Article
Mazza, G., Al-Akkad, W., Telese, A., Longato, L., Urbani, L., Robinson, B., Hall, A., Kong, K., Frenguelli, L., Marrone, G., Willacy, O., Shaeri, M., Burns, A., Malago, M., Gilbertson, J., Rendell, N., Moore, K., Hughes, D., Notingher, I., Jell, G., …Pinzani, M. (in press). Rapid production of human liver scaffolds for functional tissue engineering by high shear stress oscillation-decellularization. Scientific Reports, 7, Article 5534. https://doi.org/10.1038/s41598-017-05134-1

The development of human liver scaffolds retaining their 3-dimensional structure and extra-cellular matrix (ECM) composition is essential for the advancement of liver tissue engineering. We report the design and validation of a new methodology for th... Read More about Rapid production of human liver scaffolds for functional tissue engineering by high shear stress oscillation-decellularization.

High-temperature quantum oscillations caused by recurring Bloch states in graphene superlattices (2017)
Journal Article
Krishna Kumar, R. K., Chen, X., Auton, G., Mishchenko, A., Bandurin, D. A., Morozov, S., Cao, Y., Khestanova, E., Ben Shalom, M., Kretinin, A., Novoselov, K., Eaves, L., Grigorieva, I. V., Ponomarenko, L., Fal’ko, V., & Geim, A. (2017). High-temperature quantum oscillations caused by recurring Bloch states in graphene superlattices. Science, 357(6347), 181-184. https://doi.org/10.1126/science.aal3357

Cyclotron motion of charge carriers in metals and semiconductors leads to Landau quantization and magneto-oscillatory behavior in their properties. Cryogenic temperatures are usually required to observe these oscillations. We show that graphene super... Read More about High-temperature quantum oscillations caused by recurring Bloch states in graphene superlattices.

Quantum back-action-evading measurement of motion in a negative mass reference frame (2017)
Journal Article
Møller, C. B., Thomas, R. A., Vasilakis, G., Zeuthen, E., Tsaturyan, Y., Balabas, M., Jensen, K., Schliesser, A., Hammerer, K., & Polzik, E. S. (2017). Quantum back-action-evading measurement of motion in a negative mass reference frame. Nature, 547, 191-195. https://doi.org/10.1038/nature22980

© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Quantum mechanics dictates that a continuous measurement of the position of an object imposes a random quantum back-Action (QBA) perturbation on its momentum. This ran... Read More about Quantum back-action-evading measurement of motion in a negative mass reference frame.