CESIUM-INDUCED QUANTIZED 2D ELECTRON CHANNEL ON THEInAs(110)SURFACE

V. Yu. Aristov, G. Le Lay, M. Grehk, V.M. Zhilin, A. Taleb-Ibrahimi, G. Indlekofer and P. Soukiassian
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V. Yu. Aristov: CRMC2-CNRS, Campus de Luminy, Case 913, 13288 Marseille Cedex 09, France;
G. Le Lay: CRMC2-CNRS, Campus de Luminy, Case 913, 13288 Marseille Cedex 09, France;
M. Grehk: Department of Physics, Royal Institute of Technology, 10044 Stockholm, Sweden
V.M. Zhilin: Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow district, 142432, Russia
A. Taleb-Ibrahimi: LURE, Université de Paris-Sud, Bâtiment 209 D, 91405 Orsay Cedex, France
G. Indlekofer: LURE, Université de Paris-Sud, Bâtiment 209 D, 91405 Orsay Cedex, France
P. Soukiassian: Commissariat à l’Energie Atomique, DSM-DRECAM-SRSIM, Bâtiment 462, Centre d’Etudes de Saclay, 91191 Gif sur Yvette Cedex, France;

Surface Review and Letters (SRL), 1995, vol. 02, issue 06, 723-729

Abstract: We present the first clear evidence of electron emission arising directly from a quantized two-dimensional electron channel from theInAs(110)surface covered by a few Cs atoms (≈ 0.01 Cs ML). Spectral features observed by photoemission spectroscopy using synchrotron radiation reveal discrete-energy electronic states resulting from quantization in the direction normal to the surface. The electron photoemission originates from the vicinities of$\bar{\Gamma}$points in the first and second surface Brillouin zones corresponding to the bottom of the conduction band. These findings are in agreement with self-consistent theoretical energy-level calculations using a jellium-like model.

Date: 1995
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DOI: 10.1142/S0218625X95000650

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