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David Bowler | London Centre for Nanotechnology

Dr David Bowler

PI
ext: 37229
office:

4C2

Research interests:

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

Biography:

  • 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)
  • Reader at UCL (2005-present)
External positions held: 
Research: 

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



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.

Recent Publications

A description of the Conquest linear scaling DFT code

Investigation of the In-Bi chain formed on Si(001) after deposition of In on Bi nanolines

Description of a scheme for open boundary calculations of current-induced heating in nanowires

Research Highlights

Scanning tunnelling microscopy (STM) images of the quantum states of an artifici
By introducing individual silicon atom ‘defects’ using a scanning tunnelling microscope, scientists at the...
Traditionally, phosphorus and arsenic atoms have been used as donors in silicon, donating electrons that make up the current...
Teaching: 

Teaching (3rd year electromagnetism PHAS3201); Supervising students (5 PhD, 1 MSc)

General News

Dr's David Bowler, Andrew Horsfield and Professor Mike Pepper of the London Centre for Nanotechnology, have all been awarded the lifetime recognition of an “Outstanding Referee” for the American Physical Society (APS).