Attractive Coulomb interaction of two-dimensional Rydberg excitons
Shelykh, I. A.
Date of Issue2016
School of Physical and Mathematical Sciences
Asian Media Information and Communication Centre
We analyze theoretically the Coulomb scattering processes of highly excited excitons in the direct-band-gap semiconductor quantum wells. We find that contrary to the interaction of ground-state excitons, the electron and hole exchange interaction between excited excitons has an attractive character both for s- and p-type two-dimensional (2D) excitons. Moreover, we show that similar to the three-dimensional highly excited excitons, the direct interaction of 2D Rydberg excitons exhibits van der Waals–type long-range interaction. The results predict the linear growth of the absolute value of exchange interaction strength with an exciton principal quantum number and point the way towards enhancement of optical nonlinearity in 2D excitonic systems.
Physical Review B
© 2016 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of 2016 American Physical Society. The published version is available at: [http://dx.doi.org/10.1103/PhysRevB.93.245302]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.