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Title: 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:
ORCiD logo [1];  [1];  [2];  [1];  [3];  [4];  [5];  [6];  [7];  [7]
  1. Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics
  2. Columbia Univ., New York, NY (United States). Dept. of Physics
  3. Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics, and Dept. of Physics
  4. Istituto Italiano di Tecnologia, Genova (Italy). Graphene Lab.; Istituto Nanoscienze-CNR and Scuola Normale Superiore, Pisa (Italy). National Enterprise for nanoScience and nanoTechnology (NEST)
  5. 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
  6. Purdue Univ., West Lafayette, IN (United States). Birck Nanotechnology Center, School of Materials Engineering
  7. 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:
Journal Article: 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},
url = {https://www.osti.gov/biblio/1467886}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 11,
volume = 109,
place = {United States},
year = {2016},
month = {9}
}

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Cited by: 3 works
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Works referenced in this record:

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  • Scarabelli, Diego; Wang, Sheng; Pinczuk, Aron
  • Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena, Vol. 33, Issue 6
  • https://doi.org/10.1116/1.4932672

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    Emerging many-body effects in semiconductor artificial graphene with low disorder
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