Probing GaSb(110) Surface and Interfaces by Photon Stimulated Desorption (PSD)
We present photon stimulated desorption (PSD) studies of alkali metals Na and Cs on a III-V semiconductor GaSb(110). It is shown that both Na and Cs alter significantly the surface reactivity of the GaSb(110) as indicated by the desorption of H+ which is observed in the presence of an alkali metal overlayer but absent in the case of pure cleaved surfaces. The different desorption sites of H+ on these surfaces are discussed together with the difference between Na and Cs overlayers.
KeywordsAlkali Metal Rapid Thermal Annealing Surface Electronic Structure Metal Overlayer Surface Free Charge
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