Imperial College London

Peter Haynes

Faculty of EngineeringDepartment of Materials

Head of Department of Materials
 
 
 
//

Contact

 

+44 (0)20 7594 5158p.haynes Website CV

 
 
//

Assistant

 

Miss Catherine Graham +44 (0)20 7594 3330

 
//

Location

 

201BRoyal School of MinesSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Conduit:2008:10.1103/PhysRevB.78.195310,
author = {Conduit, GJ and Haynes, PD},
doi = {10.1103/PhysRevB.78.195310},
journal = {PHYS REV B},
title = {Diffusion Monte Carlo study of a valley-degenerate electron gas and application to quantum dots},
url = {http://dx.doi.org/10.1103/PhysRevB.78.195310},
volume = {78},
year = {2008}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - A many-flavor electron gas (MFEG) in a semiconductor with a valley degeneracy ranging between 6 and 24 was analyzed using diffusion Monte Carlo (DMC) calculations. The DMC results compare well to an analytic expression derived by one of us [Phys. Rev. B 78, 035111 (2008)] for the total energy to within +/- 1% over an order of magnitude range of density, which increases with valley degeneracy. For Bi2Te3 (sixfold valley degeneracy) the applicable charge-carrier densities are between 7x10(19) cm(-3) and 2x10(20) cm(-3). DMC calculations distinguished between an exact and a useful approximate expression for the 24-fold degenerate MFEG polarizability for wave numbers 2p(F)< q < 7p(F). The analytical result for the MFEG is generalized to inhomogeneous systems by means of a gradient correction; the validity range of this approach is obtained. Employed within a density-functional theory calculation this approximation compares well to DMC results for a quantum dot.
AU - Conduit,GJ
AU - Haynes,PD
DO - 10.1103/PhysRevB.78.195310
PY - 2008///
SN - 1098-0121
TI - Diffusion Monte Carlo study of a valley-degenerate electron gas and application to quantum dots
T2 - PHYS REV B
UR - http://dx.doi.org/10.1103/PhysRevB.78.195310
UR - http://www.cmth.ph.ic.ac.uk/people/p.haynes/papers/paper29.html
VL - 78
ER -