Dr Alan Drew

Reader in Physics at QMUL and Yangtze River Professor at Sichuan University

News

Website being updated

After a long absence of updating this website, I am currently updating it with recent research work. In a nutshell, in the last few years I let the research take 1st place, and got out of the habit of updating the website. I am now making amends.
In particular, I no longer work on superconductivity as [...]

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Techniques

Alan specialises in using spin sensitive probes situated at central facilities to characterise and understand the fundamental properties of materials. As a consequence, sample growth and characterisation are important features of his research profile. See the links below for a summary of the techniques that Alan uses regularly in his research.


Recent Activities

See below for some recent examples of research projects. To view the full list, please use the navigation to the right.

Organic: Charge Dynamics

The effects of magnetic fields on light output and current in OLEDs»

Measurements of the effect of a magnetic field on the light output and current through an organic light-emitting diode made with deuterated aluminum tris(8-hydroxyquinoline) have shown that hyperfine coupling with protons is not the cause of the intrinsic organic magnetoresistance and that interactions with unpaired electrons in the device may be responsible.
In related work, we [...]

Organic: Spin Dynamics

Engineering spin propagation across a hybrid organic/inorganic interface using a polar layer»

Dr Drew and his team have investigated how layers of Lithium Fluoride (LiF) - a material that has an intrinsic electric field - can modify the spin of electrons transported through these spin valves.

Superconductivity: Thin Films

Giant superconductivity-induced modulation of ferromagnetism in thin film heterostructures»

The competition between superconducting and magnetic order is a long-standing question in condensed matter physics. These two forms of order are usually mutually exclusive, and are found to coexist in relatively few materials. The situation is particularly intriguing when the same electrons are involved in both forms of order, since this indicates new and exotic [...]

Superconductivity: Bulk

Coexistence and Competition of Magnetism and Superconductivity on the Nanometer Scale»

We have found, with muon spin rotation and infrared spectroscopy experiments on underdoped BaFe1.89Co0.11As2, bulk magnetism and superconductivity (SC) coexist and compete on the nanometer length scale. The combined data reveal a bulk magnetic order, likely due to an incommensurate spin density wave (SDW), which develops below Tmag≈32  K and becomes reduced in magnitude (but not in volume) below Tc=21.7  K. [...]