Empirical relation between gate voltage and electrostatic potential in the one-dimensional electron gas of a split-gate device.
作者： D. A. Wharam , U. Ekenberg , M. Pepper , D. G. Hasko , H. Ahmed
关键词: Narrow channel 、 Physics 、 Function (mathematics) 、 Condensed matter physics 、 Parabolic potential 、 Communication channel 、 Heterojunction 、 Gate voltage 、 Fermi gas
摘要: We study the magnetic depopulation of one-dimensional subbands in a narrow channel GaAs-${\mathrm{Al}}_{\mathrm{x}}$${\mathrm{Ga}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$As heterojunction. The is sufficiently short that transport through ballistic and quantized resistance due to subband structure readily observed. have made detailed comparison between experimental data variational calculation with simple model potential. This potential flat middle parabolic at edges it found be clearly better than commonly used Both thickness carrier concentration been extracted as function gate voltage. good agreement only two adjustable parameters indicates this gives description actual electron gas split-gate device.
sci-hub.se 参考文章(8)
S.E. Laux, D.J. Frank, Frank Stern, Quasi-one-dimensional electron states in a split-gate GaAs/AlGaAs heterostructure Surface Science. ,vol. 196, pp. 101- 106 ,(1988) , 10.1016/0039-6028(88)90671-1
K. -F. Berggren, T. J. Thornton, D. J. Newson, M. Pepper, Magnetic depopulation of 1D subbands in a narrow 2D electron gas in a GaAs:AlGaAs heterojunction. Physical Review Letters. ,vol. 57, pp. 1769- 1772 ,(1986) , 10.1103/PHYSREVLETT.57.1769
K -F Berggren, D J Newson, A novel basis set for quantum calculations in MESFET and JFET devices Semiconductor Science and Technology. ,vol. 1, pp. 246- 255 ,(1986) , 10.1088/0268-1242/1/4/003
B. J. van Wees, H. van Houten, C. W. J. Beenakker, J. G. Williamson, L. P. Kouwenhoven, D. van der Marel, C. T. Foxon, Quantized conductance of point contacts in a two-dimensional electron gas. Physical Review Letters. ,vol. 60, pp. 848- 850 ,(1988) , 10.1103/PHYSREVLETT.60.848
D A Wharam, T J Thornton, R Newbury, M Pepper, H Ahmed, J E F Frost, D G Hasko, D C Peacock, D A Ritchie, G A C Jones, One-dimensional transport and the quantisation of the ballistic resistance Journal of Physics C: Solid State Physics. ,vol. 21, ,(1988) , 10.1088/0022-3719/21/8/002
D. Childers, P. Pincus, Size Effects on the Diamagnetic Susceptibility of a Free-Electron Gas Physical Review. ,vol. 177, pp. 1036- 1040 ,(1969) , 10.1103/PHYSREV.177.1036
S. B. Kaplan, A. C. Warren, Magnetoconductance oscillations of a quasi-one-dimensional electron gas in a parabolic transverse potential. Physical Review B. ,vol. 34, pp. 1346- 1348 ,(1986) , 10.1103/PHYSREVB.34.1346
T. J. Thornton, M. Pepper, H. Ahmed, D. Andrews, G. J. Davies, One-Dimensional Conduction in the 2D Electron Gas of a GaAs-AlGaAs Heterojunction Physical Review Letters. ,vol. 56, pp. 1198- 1201 ,(1986) , 10.1103/PHYSREVLETT.56.1198