Novel excitonic states in quantum Hall systems: Bound states of spin waves and a valence band hole
| dc.creator | Quinn, John J. | |
| dc.creator | Wojs, Arkadiusz | |
| dc.date | 2002-06-21 | |
| dc.date.accessioned | 2026-07-25T22:14:33Z | |
| dc.description | If the Zeeman energy is small, the lowest energy excitations of a two dimensional electron gas at filling factor nu=1 are spin waves (spin flip excitations). At nu slightly larger (smaller) than unity, reversed spin electrons (spin holes) can form bound states with K spin waves that are known as skyrmions, S_K^- (antiskyrmions, S_K^+). It is suggested in this work that a valence hole can also bind K spin waves to form an excitonic complex X_K^+, analogous to the S_K^+. One spin hole of the S_K^+ is simply replaced by the valence hole. At nu<=1, a small number of S_K^+'s are present before introduction of the valence hole. The (S_K^+)-(X_K^+) repulsion leads to correlations and photoluminescence similar to those of a dilute electron-(charged-exciton) (e-X^-) system at nu<=1/3. At nu>=1, the (S_K^-)-(X_K^+) attraction can potentially lead to different behavior. | |
| dc.description | 9 pages, 4 figures, invited lecture at SID8, Buffalo (2002) | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0206413 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0206413 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/87226 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Novel excitonic states in quantum Hall systems: Bound states of spin waves and a valence band hole | |
| dc.type | text |