Observation of electron states of small period artificial graphene in nano-patterned GaAs quantum wells
Abstract
Engineered honeycomb lattices, called artificial graphene (AG), are tunable platforms for the study of novel electronic states related to Dirac physics. Here in this work, we report the achievement of electronic bands of the honeycomb topology with the period as low as 40 nm on the nano-patterned modulation-doped AlGaAs/GaAs quantum wells. Resonant inelastic light scattering spectra reveal peaks which are interpreted as combined electronic transitions between subbands of the quantum well confinement with a change in the AG band index. Spectra lineshapes are explained by joint density of states obtained from the calculated AG electron band structures. These results provide a basis for further advancements in AG physics.
- Authors:
-
[1];
- Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics
- Columbia Univ., New York, NY (United States). Dept. of Physics
- Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics, and Dept. of Physics
- Istituto Italiano di Tecnologia, Genova (Italy). Graphene Lab.; Istituto Nanoscienze-CNR and Scuola Normale Superiore, Pisa (Italy). National Enterprise for nanoScience and nanoTechnology (NEST)
- Purdue Univ., West Lafayette, IN (United States). Birck Nanotechnology Center, Dept. of Physics and Astronomy, School of Materials Engineering and School of Electrical and Computer Engineering
- Purdue Univ., West Lafayette, IN (United States). Birck Nanotechnology Center, School of Materials Engineering
- Princeton Univ., NJ (United States). Dept. of Electrical Engineering
- Publication Date:
- Research Org.:
- Columbia Univ., New York, NY (United States)
- Sponsoring Org.:
- USDOE; National Science Foundation (NSF); Italian Ministry of Research (MIUR); European Union (EU). European Graphene Flagship
- OSTI Identifier:
- 1467886
- Alternate Identifier(s):
- OSTI ID: 1323994
- Grant/Contract Number:
- SC0010695; SC0006671
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 109; Journal Issue: 11; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Wang, Sheng, Scarabelli, Diego, Kuznetsova, Yuliya Y., Wind, Shalom J., Pinczuk, Aron, Pellegrini, Vittorio, Manfra, Michael J., Gardner, Geoff C., Pfeiffer, Loren N., and West, Ken W. Observation of electron states of small period artificial graphene in nano-patterned GaAs quantum wells. United States: N. p., 2016.
Web. doi:10.1063/1.4962461.
Wang, Sheng, Scarabelli, Diego, Kuznetsova, Yuliya Y., Wind, Shalom J., Pinczuk, Aron, Pellegrini, Vittorio, Manfra, Michael J., Gardner, Geoff C., Pfeiffer, Loren N., & West, Ken W. Observation of electron states of small period artificial graphene in nano-patterned GaAs quantum wells. United States. https://doi.org/10.1063/1.4962461
Wang, Sheng, Scarabelli, Diego, Kuznetsova, Yuliya Y., Wind, Shalom J., Pinczuk, Aron, Pellegrini, Vittorio, Manfra, Michael J., Gardner, Geoff C., Pfeiffer, Loren N., and West, Ken W. Mon .
"Observation of electron states of small period artificial graphene in nano-patterned GaAs quantum wells". United States. https://doi.org/10.1063/1.4962461. https://www.osti.gov/servlets/purl/1467886.
@article{osti_1467886,
title = {Observation of electron states of small period artificial graphene in nano-patterned GaAs quantum wells},
author = {Wang, Sheng and Scarabelli, Diego and Kuznetsova, Yuliya Y. and Wind, Shalom J. and Pinczuk, Aron and Pellegrini, Vittorio and Manfra, Michael J. and Gardner, Geoff C. and Pfeiffer, Loren N. and West, Ken W.},
abstractNote = {Engineered honeycomb lattices, called artificial graphene (AG), are tunable platforms for the study of novel electronic states related to Dirac physics. Here in this work, we report the achievement of electronic bands of the honeycomb topology with the period as low as 40 nm on the nano-patterned modulation-doped AlGaAs/GaAs quantum wells. Resonant inelastic light scattering spectra reveal peaks which are interpreted as combined electronic transitions between subbands of the quantum well confinement with a change in the AG band index. Spectra lineshapes are explained by joint density of states obtained from the calculated AG electron band structures. These results provide a basis for further advancements in AG physics.},
doi = {10.1063/1.4962461},
journal = {Applied Physics Letters},
number = 11,
volume = 109,
place = {United States},
year = {Mon Sep 12 00:00:00 EDT 2016},
month = {Mon Sep 12 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
Emerging many-body effects in semiconductor artificial graphene with low disorder
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New topological states in HgTe quantum wells from defect patterning
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Experimental observation of Dirac cones in artificial graphene lattices
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