Abstract
The creation of a two-dimensional electron gas (2DEG) by pumping Rydberg surface states on a metal surface with a laser is proposed and analyzed. Assuming Auger electron transitions between surface electron states to dominate the relaxation dynamics of the surface Rydberg electrons, maximum density n s and lifetime τ of this 2DEG are calculated. On Cu(111) values of n s above 10 11cm −2 and of τ beyond 100 femtoseconds may be established. Conditions for optimal substrate are formulated.
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