Observation of electron states of small period artificial graphene in nano-patterned GaAs quantum wells

Sheng Wang; Diego Scarabelli; Yuliya Y. Kuznetsova; Shalom J. Wind; Aron Pinczuk; Vittorio Pellegrini; Michael J. Manfra; Geoff C. Gardner; Loren N. Pfeiffer; Ken W. West

doi:10.1063/1.4962461

Observation of electron states of small period artificial graphene in nano-patterned GaAs quantum wells

Sheng Wang, Diego Scarabelli, Yuliya Y. Kuznetsova, Shalom J. Wind, Aron Pinczuk, Vittorio Pellegrini, Michael J. Manfra, Geoff C. Gardner, Loren N. Pfeiffer, Ken W. West

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

Engineered honeycomb lattices, called artificial graphene (AG), are tunable platforms for the study of novel electronic states related to Dirac physics. 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.

Original language	English (US)
Article number	113101
Journal	Applied Physics Letters
Volume	109
Issue number	11
DOIs	https://doi.org/10.1063/1.4962461
State	Published - Sep 12 2016
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4962461

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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. 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.",

author = "Sheng Wang and Diego Scarabelli and Kuznetsova, {Yuliya Y.} and Wind, {Shalom J.} and Aron Pinczuk and Vittorio Pellegrini and Manfra, {Michael J.} and Gardner, {Geoff C.} and Pfeiffer, {Loren N.} and West, {Ken W.}",

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doi = "10.1063/1.4962461",

language = "English (US)",

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T1 - Observation of electron states of small period artificial graphene in nano-patterned GaAs quantum wells

AU - Wang, Sheng

AU - Scarabelli, Diego

AU - Kuznetsova, Yuliya Y.

AU - Wind, Shalom J.

AU - Pinczuk, Aron

AU - Pellegrini, Vittorio

AU - Manfra, Michael J.

AU - Gardner, Geoff C.

AU - Pfeiffer, Loren N.

AU - West, Ken W.

PY - 2016/9/12

Y1 - 2016/9/12

N2 - Engineered honeycomb lattices, called artificial graphene (AG), are tunable platforms for the study of novel electronic states related to Dirac physics. 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.

AB - Engineered honeycomb lattices, called artificial graphene (AG), are tunable platforms for the study of novel electronic states related to Dirac physics. 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.

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Observation of electron states of small period artificial graphene in nano-patterned GaAs quantum wells

Abstract

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