Landau level formation and magnetic breakdown in coupled double quantum wells

N. E. Harff; J. A. Simmons; S. K. Lyo; J. F. Klem; G. S. Boebinger; L. N. Pfeiffer; K. W. West

doi:10.1016/s1386-9477(97)00040-4

Landau level formation and magnetic breakdown in coupled double quantum wells

N. E. Harff, J. A. Simmons, S. K. Lyo, J. F. Klem, G. S. Boebinger, L. N. Pfeiffer, K. W. West

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

Abstract

We investigate Landau level formation in closely coupled double quantum wells by measuring the longitudinal resistance (R_xx) as a function of both perpendicular (B_⊥) and in-plane (B_∥) magnetic fields. B_∥ distorts the dispersion curve resulting in a continuously tunable, non-parabolic, two-component system. B_⊥ causes Landau level formation in each branch of the dispersion. These two ladders of Landau levels have multiple crossings because the cyclotron masses and Fermi energies of the two components change in opposite directions with B_∥. Due to magnetic breakdown of the Fermi surface, a third set of Landau levels, independent of B_∥, occurs at slightly higher B_⊥ (≈ 1 T).

Original language	English (US)
Pages (from-to)	185-187
Number of pages	3
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	1
Issue number	1-4
DOIs	https://doi.org/10.1016/s1386-9477(97)00040-4
State	Published - Jan 19 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

Keywords

Electrical transport measurements
Magnetic phenomena
Quantum wells

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10.1016/s1386-9477(97)00040-4

Cite this

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title = "Landau level formation and magnetic breakdown in coupled double quantum wells",

abstract = "We investigate Landau level formation in closely coupled double quantum wells by measuring the longitudinal resistance (Rxx) as a function of both perpendicular (B⊥) and in-plane (B∥) magnetic fields. B∥ distorts the dispersion curve resulting in a continuously tunable, non-parabolic, two-component system. B⊥ causes Landau level formation in each branch of the dispersion. These two ladders of Landau levels have multiple crossings because the cyclotron masses and Fermi energies of the two components change in opposite directions with B∥. Due to magnetic breakdown of the Fermi surface, a third set of Landau levels, independent of B∥, occurs at slightly higher B⊥ (≈ 1 T).",

keywords = "Electrical transport measurements, Magnetic phenomena, Quantum wells",

author = "Harff, {N. E.} and Simmons, {J. A.} and Lyo, {S. K.} and Klem, {J. F.} and Boebinger, {G. S.} and Pfeiffer, {L. N.} and West, {K. W.}",

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T1 - Landau level formation and magnetic breakdown in coupled double quantum wells

AU - Harff, N. E.

AU - Simmons, J. A.

AU - Lyo, S. K.

AU - Klem, J. F.

AU - Boebinger, G. S.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 1997/1/19

Y1 - 1997/1/19

N2 - We investigate Landau level formation in closely coupled double quantum wells by measuring the longitudinal resistance (Rxx) as a function of both perpendicular (B⊥) and in-plane (B∥) magnetic fields. B∥ distorts the dispersion curve resulting in a continuously tunable, non-parabolic, two-component system. B⊥ causes Landau level formation in each branch of the dispersion. These two ladders of Landau levels have multiple crossings because the cyclotron masses and Fermi energies of the two components change in opposite directions with B∥. Due to magnetic breakdown of the Fermi surface, a third set of Landau levels, independent of B∥, occurs at slightly higher B⊥ (≈ 1 T).

AB - We investigate Landau level formation in closely coupled double quantum wells by measuring the longitudinal resistance (Rxx) as a function of both perpendicular (B⊥) and in-plane (B∥) magnetic fields. B∥ distorts the dispersion curve resulting in a continuously tunable, non-parabolic, two-component system. B⊥ causes Landau level formation in each branch of the dispersion. These two ladders of Landau levels have multiple crossings because the cyclotron masses and Fermi energies of the two components change in opposite directions with B∥. Due to magnetic breakdown of the Fermi surface, a third set of Landau levels, independent of B∥, occurs at slightly higher B⊥ (≈ 1 T).

KW - Electrical transport measurements

KW - Magnetic phenomena

KW - Quantum wells

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U2 - 10.1016/s1386-9477(97)00040-4

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JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-4

ER -

Landau level formation and magnetic breakdown in coupled double quantum wells

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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