Magnetization measurements on a two-dimensional electron system
We have measured the De Haas-Van Alphen oscillations in a 2D electron system of GaAs-(AlGa)As superlattices from 0 to 5 T at 1.5 K. The amplitude of the oscillations together with known density distribution implies for the Landau levels a half-width of ∼2 meV. which roughly agrees with the width cal...
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| Published in | Surface science Vol. 142; no. 1; pp. 294 - 297 |
|---|---|
| Main Authors | , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
01.07.1984
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| Online Access | Get full text |
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| Abstract | We have measured the De Haas-Van Alphen oscillations in a 2D electron system of GaAs-(AlGa)As superlattices from 0 to 5 T at 1.5 K. The amplitude of the oscillations together with known density distribution implies for the Landau levels a half-width of ∼2 meV. which roughly agrees with the width calculated from the zero field mobility of 19000
cm
2
V · s
. We have observed eddy current relaxation times up to 300 s at T ∼ 0.4 K suggesting the resistivity of the material at a quantized Hall plateau to be as low as ρ
xx
≈- 10
−10 Ω/□ corresponding to a 3D resistivity of ρ ≈ 10
−16 Ω cm. |
|---|---|
| AbstractList | We have measured the De Haas-Van Alphen oscillations in a 2D electron system of GaAs-(AlGa)As superlattices from 0 to 5 T at 1.5 K. The amplitude of the oscillations together with known density distribution implies for the Landau levels a half-width of ∼2 meV. which roughly agrees with the width calculated from the zero field mobility of 19000
cm
2
V · s
. We have observed eddy current relaxation times up to 300 s at T ∼ 0.4 K suggesting the resistivity of the material at a quantized Hall plateau to be as low as ρ
xx
≈- 10
−10 Ω/□ corresponding to a 3D resistivity of ρ ≈ 10
−16 Ω cm. |
| Author | Wiegmann, W. Narayanamurti, V. Haavasoja, T. Störmer, H.L. Bishop, D.J. Gossard, A.C. |
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| Cites_doi | 10.1116/1.582618 10.1063/1.92408 10.1103/PhysRevLett.45.494 10.1103/PhysRevB.25.1405 10.1016/0038-1098(79)91010-X |
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| References | Tsui, Gossard (BIB2) 1981; 37 K. von Klitzing, G. Dorda and M. Pepper, Phys. Rev. Letters 45 91980) 494. T. Haavasoja and D.J. Bishop, to be published. Störmer, Haavasoja, Narayanamurti, Gossard, Wiegmann (BIB4) 1983; B1 Tsui, Störmer, Gossard (BIB7) 1982; B25 Tsui, Störmer, Gossard (BIB3) 1982; B25 H.L. Störmer, R. Dingle, A.C. Gossard, W. Wiegmann and M.D. Sturge, Solid State Commun. 29 91979) 705. 10.1016/0039-6028(84)90325-X_BIB6 10.1016/0039-6028(84)90325-X_BIB1 Tsui (10.1016/0039-6028(84)90325-X_BIB2) 1981; 37 Tsui (10.1016/0039-6028(84)90325-X_BIB3) 1982; B25 10.1016/0039-6028(84)90325-X_BIB5 Tsui (10.1016/0039-6028(84)90325-X_BIB7) 1982; B25 Störmer (10.1016/0039-6028(84)90325-X_BIB4) 1983; B1 |
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| Snippet | We have measured the De Haas-Van Alphen oscillations in a 2D electron system of GaAs-(AlGa)As superlattices from 0 to 5 T at 1.5 K. The amplitude of the... |
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