Gamucci, A. (2015) Evidence for electron-hole pairing in graphene-GaAs double layers. Il nuovo cimento C, 38 (2). pp. 1-7. ISSN 1826-9885
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Abstract
Spatially separated two-dimensional systems of electrons and holes are predicted to condense below a critical temperature into a neutral superfluid state of electron-hole pairs, called “exciton condensate”. Here evidence of this scenario is presented in systems of massless Dirac holes in a graphene flake in close proximity of electrons hosted in a gallium arsenide quantum well. A logarithmic enhancement of Coulomb drag at zero magnetic field and temperatures below 5K, which we attribute to pairing fluctuations extending above the temperature for exciton condensation, has been found experimentally. Our Dirac-Schr¨odinger hybrid system offers a new benchmark to study superfluidity in reduced spatial dimensions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Electronic transport in graphene ; Excitons and related phenomena |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 27 May 2020 15:27 |
| Last Modified: | 27 May 2020 15:27 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/19030 |
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