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Tuning of the Gap in a Laughlin-Bychkov-Rashba Incompressible Liquid | | Marco Califano
; Tapash Chakraborty
; and Pekka Pietiläinen
; | | Date: |
19 Nov 2004 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Affiliation: | Department of Physics and Astronomy, University of Manitoba, Winnipeg, Canada, Department of Physical Sciences/Theoretical Physics, University of Oulu, Finland | | Abstract: | We report on our investigation of the influence of Bychkov-Rashba spin-orbit interaction (SOI) on the incompressible Laughlin state. We find that experimentally obtainable values of the spin-orbit coupling strength can induce as much as a 25% increase in the quasiparticle-quasihole gap Eg at low magnetic fields in InAs, thereby increasing the stability of the liquid state. The SOI-modulated enhancement of Eg is also significant for filling factors 1/5 and 1/7, where the FQH state is usually weak. This raises the intriguing possibility of tuning, via the SO coupling strength, the liquid to solid transition to much lower densities. | | Source: | arXiv, cond-mat/0411524 | | Services: | Forum | Review | PDF | Favorites | |
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