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Capacitance is the ability of a device to store energy in the electric field. Conventional capacitors are composed of two metallic contacts with a dielectric in between arranged in different geometries, the most well-known of them being an parallel plate capacitor with the capacitance value, C geo =ε r ε 0 A/d, solely dependent on the geometry of the structure and the physical properties of the dielectric. In an unconventional capacitor, however, at least one of the plates is replaced with a two-dimensional electron system (2DES) attained in oxide-semiconductor interfaces [1], quantum wells in III-V material heterojunctions [2, 3]. Distinctive to unconventional capacitors is the capability to control carrier concentration in the non-metallic plates through application of a voltage [4]. Additionally the many body interactions among charge carriers in 2DES are manifested as capacitors in series with the geometrical capacitance of …
Publication date: 
23 Sep 2012

Pouya Dianat, Richard W Prusak, Anna Persano, Fabio Quaranta, Adriano Cola, Bahram Nabet

Biblio References: 
Pages: 792-793
IEEE Photonics Conference 2012