Giant magneto-photoelectric effect in suspended graphene
In: New Journal of Physics (NJP), Jg. 19 (2017), Heft 6, S. 063028
2017Artikel/Aufsatz in ZeitschriftOA Gold
Physik (inkl. Astronomie)Fakultät für Physik » Theoretische PhysikForschungszentren » Center for Nanointegration Duisburg-Essen (CENIDE)
Damit verbunden: 1 Publikation(en)
Titel in Englisch:
Giant magneto-photoelectric effect in suspended graphene
Autor*in:
Sonntag, Jens
- LSF ID
- 55038
- ORCID
- 0000-0001-5947-0400
- Sonstiges
- der Hochschule zugeordnete*r Autor*in
- LSF ID
- 49871
- ORCID
- 0000-0003-3796-1908
- Sonstiges
- der Hochschule zugeordnete*r Autor*in
- LSF ID
- 52252
- ORCID
- 0000-0001-7378-0851
- Sonstiges
- der Hochschule zugeordnete*r Autor*in
- GND
- 1042619697
- LSF ID
- 2509
- ORCID
- 0000-0002-0405-7720
- Sonstiges
- der Hochschule zugeordnete*r Autor*in
Erscheinungsjahr:
2017
Open Access?:
OA Gold
Scopus ID
Notiz:
OA gold
Sprache des Textes:
Englisch
Schlagwort, Thema:
carrier multiplication ; current generation ; magneto-photoelectric effect ; suspended graphene
Abstract in Englisch:
We study the optical response of a suspended, monolayer graphene field-effect transistor structure in magnetic fields of up to 9 T (quantum Hall regime). With an illumination power of only 3 μW, we measure a photocurrent of up to 400 nA (without an applied bias) corresponding to a photo-responsivity of 0.13 A W-1, which we believe to be one of the highest values ever measured in single-layer graphene. We discuss possible mechanisms for generating this strong photo-response (17 electron-hole pairs per 100 incident photons). Based on our experimental findings, we believe that the most likely scenario is a ballistic two-stage process including carrier multiplication via Auger-type inelastic Coulomb scattering at the graphene edge.