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Paper detail

Out of plane screening and dipolar interactions in heterostructures

Out-of-plane screening (OPS) is expected to occur generally in metal-semiconductor interfaces but this aspect has been overlooked in previous studies. In this paper we study the effect of OPS in electron-hole bilayer (EHBL) systems. The validity of the dipolar interaction induced by OPS is justified with a RPA calculation. Effect of OPS in electron-hole liquid with close-by screening layers is studied. We find that OPS affects the electronic properties in low density and long wavelength regime. The corresponding zero-temperature phase diagram is obtained within a mean field treatment. We argue that our result is in general relevant to other heterostrucutures. The case of strongly correlated EHBL is also discussed.

preprint2010arXivOpen access
Cheung ChanT. K. Ng
cond-mat.mtrl-sci
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Cheung ChanT. K. Ng

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