Show simple item record

dc.contributor.authorGamucci, A
dc.contributor.authorSpirito, D
dc.contributor.authorCarrega, M
dc.contributor.authorKarmakar, B
dc.contributor.authorLombardo, Antonio
dc.contributor.authorBruna, M
dc.contributor.authorPfeiffer, LN
dc.contributor.authorWest, KW
dc.contributor.authorFerrari, Andrea
dc.contributor.authorPolini, M
dc.contributor.authorPellegrini, V
dc.date.accessioned2018-09-10T22:15:24Z
dc.date.available2018-09-10T22:15:24Z
dc.date.issued2014-12-19
dc.identifier.issn2041-1723
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/280019
dc.description.abstractVertical heterostructures combining different layered materials offer novel opportunities for applications and fundamental studies. Here we report a new class of heterostructures comprising a single-layer (or bilayer) graphene in close proximity to a quantum well created in GaAs and supporting a high-mobility two-dimensional electron gas. In our devices, graphene is naturally hole-doped, thereby allowing for the investigation of electron-hole interactions. We focus on the Coulomb drag transport measurements, which are sensitive to many-body effects, and find that the Coulomb drag resistivity significantly increases for temperatures <5-10 K. The low-temperature data follow a logarithmic law, therefore displaying a notable departure from the ordinary quadratic temperature dependence expected in a weakly correlated Fermi-liquid. This anomalous behaviour is consistent with the onset of strong interlayer correlations. Our heterostructures represent a new platform for the creation of coherent circuits and topologically protected quantum bits.
dc.format.mediumElectronic
dc.languageeng
dc.publisherSpringer Science and Business Media LLC
dc.titleAnomalous low-temperature Coulomb drag in graphene-GaAs heterostructures.
dc.typeArticle
prism.publicationDate2014
prism.publicationNameNat Commun
prism.startingPage5824
prism.volume5
dc.identifier.doi10.17863/CAM.27384
dcterms.dateAccepted2014-11-10
rioxxterms.versionofrecord10.1038/ncomms6824
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2014-01
dc.contributor.orcidLombardo, Antonio [0000-0003-3088-6458]
dc.contributor.orcidFerrari, Andrea [0000-0003-0907-9993]
dc.identifier.eissn2041-1723
dc.publisher.urlhttp://dx.doi.org/10.1038/ncomms6824
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/K01711X/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/K017144/1)
pubs.funder-project-idEuropean Commission (604391)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/L016087/1)
pubs.funder-project-idEuropean Commission (289968)
cam.issuedOnline2014-12-19
rioxxterms.freetoread.startdate2015-01-31


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record