Current work & recent results
Spring 2012
A study on the surface structure of CdO(001) was conducted in conjunction with XPS measurements on the Science City XPS system. This was the last experiment of Liam's PhD and the system now awaits funding and students to continue research on nitride and oxide surfaces.
Autumn 2011
Work on the structure of the clean InN(0001) surface has been performed, with a (2x2) LEED pattern observed at very low energies. Sulfur was then deposited on to the surface in an attempt to study the structural aspects of surface passivation.
Summer 2011
Two papers have been published from our Cu(100)/Sn work, one in Phys. Rev. B and the other in Surface Science.
Spring / Summer 2011
Structural studies of the GaN(0001) surface were undertaken.
Winter 2010-11: GaP(110) and MnSb(0001)
The experimental programme over the winter months focussed on the surface structures of GaP(110)-(1x1) [presented at ISSC-18 and soon to be published], and MnSb(0001)-(2x2) [for J Aldous' thesis].
September 2010: Paper Accepted!
After a great deal of experiments and analysis, our paper on the screening potential corrections in CAICISS and the comparison of the FAN and Kalypso codes has been accepted for publication in Surface Science. Download it here.
September 2010: Load Lock Assembly
The fast entry chamber was mounted on to the system, reducing the sample turnaround time from a week to just a few hours.
August 2010: GaP(110) Studies
CAICISS experiments on atomic hydrogen cleaned GaP(110) were undertaken. This will be compared to clean surfaces prepared by ion bombardment and annealing.
August 2010: Photoemission Studies
XPS data on the sulfur passivation of InN surfaces was collected both at NCESS and the new Science City photoemission system at Warwick. Analysis is ongoing.
July 2010: MEIS Run
Our final scheduled run on the MEIS facility focussed on the trajectory-dependent energy losses of ions scattered in GaP(110). Analysis of the data is ongoing.
January 2010: Daresbury Time
Runs on the NCESS and MEIS facilities were undertaken. The MEIS run had its fair share of problems, but still resulted in this paper. A busy NCESS run resulted in lots of data and another paper on the electronic properties of InN.
November 2009: CAICISS update
Following a summer of disruption, the kit is now up and running again with a test being performed using a clean Cu(100) crystal. Next on the agenda will be load lock assembly, which will require some slight rearrangement of the lab. Once complete, the InN studies can recommence.
October 2009: MEIS Run
The XPS run at NCESS in October was cancelled due to major problems with the kit. However, depth profiling studies of InGaN and InAlN were performed at MEIS with analysis currently ongoing.
May 2009: Project update
XPS experiments at NCESS were undertaken in June, whilst at Warwick the hemispherical analyser problems have been resolved..... but the power will be off from June 8 for several weeks which means no experiments for a while.
