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Electron-polar optical phonon scattering suppression and mobility enhancement in wurtzite heterostructures

E P Pokatilov1,2, D L Nika1,2, N D Zincenco2 and A A Balandin1

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We have shown theoretically that the electron mobility in wurtzite AlN/GaN/AlN heterostructures can be enhanced by compensating the built-in electric field with the externally applied perpendicular electric field and by introducing a shallow InxGa1-xN channel in the center of GaN potential well. It was found that two- to fivefold increase of the room temperature electron mobility can be achieved. The tuning of the electron mobility with the external electric field or InxGa1-xN channel can be useful for the design of GaN-based field-effect transistors and optoelectronic devices.


PACS

63.22.-m Phonons or vibrational states in low-dimensional structures and nanoscale materials

73.40.Kp III-V semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions

72.20.Fr Low-field transport and mobility; piezoresistance

Subjects

Condensed matter: electrical, magnetic and optical

Semiconductors

Surfaces, interfaces and thin films

Nanoscale science and low-D systems

Dates

Issue 1 (2007)



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