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Landau levels and shallow donor states in GaAs/AlGaAs multiple quantum wells at megagauss magnetic fields

Journal Article · · Physical Review B
 [1];  [1];  [1];  [2];  [2];  [2];  [2];  [2];  [2];  [3];  [3]
  1. Univ. of Rzeszów (Poland). Centre for Microelectronics and Nanotechnology
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Polish Academy of Sciences (PAS), Warsaw (Poland). Inst. of Physics
+ Show Author Affiliations

Landau levels and shallow donor states in multiple GaAs/AlGaAs quantum wells (MQWs) are investigated in this paper by means of the cyclotron resonance at megagauss magnetic fields. Measurements of magneto-optical transitions were performed in pulsed fields up to 140 T and temperatures from 6–300 K. The 14 x 14 P∙p band model for GaAs is used to interpret free-electron transitions in a magnetic field. Temperature behavior of the observed resonant structure indicates, in addition to the free-electron Landau states, contributions of magnetodonor states in the GaAs wells and possibly in the AlGaAs barriers. The magnetodonor energies are calculated using a variational procedure suitable for high magnetic fields and accounting for conduction band nonparabolicity in GaAs. It is shown that the above states, including their spin splitting, allow one to interpret the observed magneto-optical transitions in MQWs in the middle infrared region. Finally, our experimental and theoretical results at very high magnetic fields are consistent with the picture used previously for GaAs/AlGaAs MQWs at lower magnetic fields.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF) (United States)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1441306
Alternate ID(s):
OSTI ID: 1348864
Report Number(s):
LA-UR--17-27396
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 11 Vol. 95; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Recent advances in ternary two-dimensional materials: synthesis, properties and applications journal January 2017
Simultaneous magneto-electro-optical measurements in modulation-doped quantum well: An investigation on magneto-photoluminescence intensity oscillations journal May 2019

Figures / Tables (7)

FIG. 1(p. 3)figure FIG. 1
FIG. 2(p. 3)figure FIG. 2
FIG. 3(p. 4)figure FIG. 3
TABLE I(p. 5)table TABLE I
FIG. 4(p. 6)figure FIG. 4
FIG. 5(p. 7)figure FIG. 5
FIG. 6(p. 8)figure FIG. 6

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Related Subjects

36 MATERIALS SCIENCE
Landau levels
optically detected magnetic resonance
quantum wells