David Bowler

Modelling bismuth nanolines on Si(001) Electronic structure of nanolines on surfaces Development of the Conquest linear scaling DFT code Development of the correlated electron-ion dynamics (CEID) formalism Interaction with experiments Contact details: Office: Room 4C2 Tel: +44 (0)20 7679 7229 Ext: 37229 Fax: +44 (0)20 7679 0595 Email:david.bowlerucl.ac.uk http://www.cmmp.ucl.ac.uk/~drb/

Research Interest
Atomic and electronic structure of nanowires; electronic structure calculations; development of novel techniques; linear scaling DFT; interaction with surface science experiments

Other activities
Teaching (3^rd year electromagnetism PHAS3201); Supervising students (5 PhD, 1 MSc); Management committees (IRC in Nanotechnology; Thomas Young Centre)

http://dx.doi.org/10.1088/0953-8984/18/19/L03 Investigation of the In-Bi chain formed on Si(001) after deposition of In on Bi nanolines

http://dx.doi.org/10.1088/0953-8984/17/25/024 Description of a scheme for open boundary calculations of current-induced heating in nanowires

• B.A.(Hons) from Cambridge University (1991)
• D. Phil from Oxford University (1997)
• Post-doctoral research at Keele University and UCL (1997-1999)
• EPSRC and Royal Society Fellowships at UCL (1999-present)
• Lecturer at UCL (2005-present)

Research

The electronic charge density for a “hut cluster” of germanium on Si(001) (colour shows height).  This feature forms due to stress between Ge and Si during epitaxial growth, and required 23,000 atoms in the calculation, which used the linear-scaling Conquest code (developed at UCL and NIMS, Japan) run on the Earth Simulator in Yokohama, Japan.  Conquest solves the Schrodinger equation for the electrons in the system using an approach called Density Functional Theory.  The hut cluster system may have applications as quantum dots or in nanoelectronics.