Quantum wire structures by MBE overgrowth on a cleaved edge

Loren Pfeiffer; H. L. Störmer; K. West; K. W. Baldwin

doi:10.1016/0022-0248(91)90996-I

Quantum wire structures by MBE overgrowth on a cleaved edge

Loren Pfeiffer
, H. L. Störmer
, K. West
, K. W. Baldwin

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

25 Scopus citations

Abstract

We have recently demonstrated the existence of a high mobility (6.1×10⁵ cm²/V·s) two-dimensional electron gas (2DEG) at the (110) vicinal surface formed by cleaving [L. Pfeiffer et al., Appl. Phys. Letters 56 (1990) 1697] a (100) GaAs wafer. We have now expanded this work to modulation-doped overgrowth on the cleaved edge of a multiperiod superlattice. We report here the first observation of the quantum Hall characteristics in such a two-dimensional system containing an atomically precise 71 Å GaAs by 31 Å Al_0.24Ga_0.76As compositional superlattice. The onset of Shubnikov-De Haas oscillations occurs at only 3000 G, implying the Landau cyclotron orbits are phase coherent over diameters as large as 5000 Å, corresponding to more than 200 GaAs/AlGaAs interface crossings.

Original language	English (US)
Pages (from-to)	333-338
Number of pages	6
Journal	Journal of Crystal Growth
Volume	111
Issue number	1-4
DOIs	https://doi.org/10.1016/0022-0248(91)90996-I
State	Published - May 2 1991
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Inorganic Chemistry
Materials Chemistry

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10.1016/0022-0248(91)90996-I

Cite this

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title = "Quantum wire structures by MBE overgrowth on a cleaved edge",

abstract = "We have recently demonstrated the existence of a high mobility (6.1×105 cm2/V·s) two-dimensional electron gas (2DEG) at the (110) vicinal surface formed by cleaving [L. Pfeiffer et al., Appl. Phys. Letters 56 (1990) 1697] a (100) GaAs wafer. We have now expanded this work to modulation-doped overgrowth on the cleaved edge of a multiperiod superlattice. We report here the first observation of the quantum Hall characteristics in such a two-dimensional system containing an atomically precise 71 {\AA} GaAs by 31 {\AA} Al0.24Ga0.76As compositional superlattice. The onset of Shubnikov-De Haas oscillations occurs at only 3000 G, implying the Landau cyclotron orbits are phase coherent over diameters as large as 5000 {\AA}, corresponding to more than 200 GaAs/AlGaAs interface crossings.",

author = "Loren Pfeiffer and St{\"o}rmer, \{H. L.\} and K. West and Baldwin, \{K. W.\}",

year = "1991",

month = may,

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doi = "10.1016/0022-0248(91)90996-I",

language = "English (US)",

volume = "111",

pages = "333--338",

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T1 - Quantum wire structures by MBE overgrowth on a cleaved edge

AU - Pfeiffer, Loren

AU - Störmer, H. L.

AU - West, K.

AU - Baldwin, K. W.

PY - 1991/5/2

Y1 - 1991/5/2

N2 - We have recently demonstrated the existence of a high mobility (6.1×105 cm2/V·s) two-dimensional electron gas (2DEG) at the (110) vicinal surface formed by cleaving [L. Pfeiffer et al., Appl. Phys. Letters 56 (1990) 1697] a (100) GaAs wafer. We have now expanded this work to modulation-doped overgrowth on the cleaved edge of a multiperiod superlattice. We report here the first observation of the quantum Hall characteristics in such a two-dimensional system containing an atomically precise 71 Å GaAs by 31 Å Al0.24Ga0.76As compositional superlattice. The onset of Shubnikov-De Haas oscillations occurs at only 3000 G, implying the Landau cyclotron orbits are phase coherent over diameters as large as 5000 Å, corresponding to more than 200 GaAs/AlGaAs interface crossings.

AB - We have recently demonstrated the existence of a high mobility (6.1×105 cm2/V·s) two-dimensional electron gas (2DEG) at the (110) vicinal surface formed by cleaving [L. Pfeiffer et al., Appl. Phys. Letters 56 (1990) 1697] a (100) GaAs wafer. We have now expanded this work to modulation-doped overgrowth on the cleaved edge of a multiperiod superlattice. We report here the first observation of the quantum Hall characteristics in such a two-dimensional system containing an atomically precise 71 Å GaAs by 31 Å Al0.24Ga0.76As compositional superlattice. The onset of Shubnikov-De Haas oscillations occurs at only 3000 G, implying the Landau cyclotron orbits are phase coherent over diameters as large as 5000 Å, corresponding to more than 200 GaAs/AlGaAs interface crossings.

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DO - 10.1016/0022-0248(91)90996-I

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EP - 338

JO - Journal of Crystal Growth

JF - Journal of Crystal Growth

IS - 1-4

ER -

Quantum wire structures by MBE overgrowth on a cleaved edge

Abstract

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