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Wannier-Stark effect on surface states |
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| Authors: | R A English S G Davidson Z L Miskovic F O Goodman A T Amos and B L Burrows |
| Institution: | a Dept of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1 b Dept of Computer Sci & Applied Math., Aston University, Birmingham, U.K., B4 7ET c Math. Group, Sch of Computing, Staffordshire University, Beaconside, Stafford, UK, ST18 0DG |
| Abstract: | A recursive Green-function (RGF) technique is used to study the surface states of an electrified solid. The concatenating nature of the method leads to a continued-fraction form of the RGF, which can be expressed as a ratio of Bessel functions. The surface density of states (SDOS), derived from the RGF, reveals a quasi-Stark-ladder distribution of the energy levels at the surface atom. The dependence of the SDOS on the applied field and surface perturbation parameters is discussed. |
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