Exciton energies and wave functions in hexagonal boron nitride using Miller and Good’s uniform approach

J. C. G. Henriques and N. M. R. Peres ()
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J. C. G. Henriques: University of Minho, Campus of Gualtar
N. M. R. Peres: University of Minho, Campus of Gualtar

The European Physical Journal B: Condensed Matter and Complex Systems, 2021, vol. 94, issue 1, 1-7

Abstract: Abstract In this paper we revisit the work of Miller and Good, which describes an uniform JWKB type of approximation to the solution of quantum problems. This paper, very well known in atomic physics in the 1970’s 1980’s of the last century, did not attract the same attention from the condensed matter community. Contrary to the usual JWKB approach, Miller and Good’s method yields wave functions that do not diverge at the classical turning points. We apply the method in the context of two-dimensional excitons, an important condensed matter system. In particular, we apply our results to excitons in hexagonal boron nitride, solving the corresponding Wannier equation. We compare the semiclassical results with others from the literature and find good agreement. Graphic abstract

Date: 2021
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DOI: 10.1140/epjb/s10051-020-00014-6

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