Details
| Original language | English |
|---|---|
| Pages (from-to) | 1294-1302 |
| Number of pages | 9 |
| Journal | Physical Review B |
| Volume | 37 |
| Issue number | 3 |
| Publication status | Published - 1 Jan 1988 |
| Externally published | Yes |
Abstract
The spin splitting in a GaAs-GaxAl1-xAs heterojunction has been studied by using the coincidence technique, where the Shubnikov de Haas oscillations of the conductivity are measured in tilted magnetic fields, and by measurements of the activation energy associated with spin-split conductivity minima. The spin splitting is found to be very strongly enhanced by exchange interactions, and values for the effective g factor as high as 6.2 have been found. The coincidence measurements were made at 0.37 K, and required the use of tilt angles in the range 85°89°. These show evidence of oscillatory spin splitting determined by the relative spin-population difference within the Landau levels. The activation energy was also studied as a function of tilt angle, and shows that the spin splitting is primarily determined by the perpendicular component of magnetic field for well-resolved levels. The dependence upon total field is sublinear and shows a saturation behavior at high tilt angles.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B, Vol. 37, No. 3, 01.01.1988, p. 1294-1302.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Exchange enhancement of the spin splitting in a GaAs-GaxAl1-xAs heterojunction
AU - Nicholas, R. J.
AU - Haug, R. J.
AU - Klitzing, K. V.
AU - Weimann, G.
PY - 1988/1/1
Y1 - 1988/1/1
N2 - The spin splitting in a GaAs-GaxAl1-xAs heterojunction has been studied by using the coincidence technique, where the Shubnikov de Haas oscillations of the conductivity are measured in tilted magnetic fields, and by measurements of the activation energy associated with spin-split conductivity minima. The spin splitting is found to be very strongly enhanced by exchange interactions, and values for the effective g factor as high as 6.2 have been found. The coincidence measurements were made at 0.37 K, and required the use of tilt angles in the range 85°89°. These show evidence of oscillatory spin splitting determined by the relative spin-population difference within the Landau levels. The activation energy was also studied as a function of tilt angle, and shows that the spin splitting is primarily determined by the perpendicular component of magnetic field for well-resolved levels. The dependence upon total field is sublinear and shows a saturation behavior at high tilt angles.
AB - The spin splitting in a GaAs-GaxAl1-xAs heterojunction has been studied by using the coincidence technique, where the Shubnikov de Haas oscillations of the conductivity are measured in tilted magnetic fields, and by measurements of the activation energy associated with spin-split conductivity minima. The spin splitting is found to be very strongly enhanced by exchange interactions, and values for the effective g factor as high as 6.2 have been found. The coincidence measurements were made at 0.37 K, and required the use of tilt angles in the range 85°89°. These show evidence of oscillatory spin splitting determined by the relative spin-population difference within the Landau levels. The activation energy was also studied as a function of tilt angle, and shows that the spin splitting is primarily determined by the perpendicular component of magnetic field for well-resolved levels. The dependence upon total field is sublinear and shows a saturation behavior at high tilt angles.
UR - http://www.scopus.com/inward/record.url?scp=0002546651&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.37.1294
DO - 10.1103/PhysRevB.37.1294
M3 - Article
AN - SCOPUS:0002546651
VL - 37
SP - 1294
EP - 1302
JO - Physical Review B
JF - Physical Review B
SN - 0163-1829
IS - 3
ER -