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Phys Rev Lett. 2006 Dec 8;97(23):237601. Epub 2006 Dec 4.

Quantized electron accumulation states in indium nitride studied by angle-resolved photoemission spectroscopy.

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Department of Physics, Boston University, Boston, Massachusetts 02215, USA.

Abstract

Electron accumulation states in InN have been measured using high resolution angle-resolved photoemission spectroscopy (ARPES). The electrons in the accumulation layer have been discovered to reside in quantum well states. ARPES was also used to measure the Fermi surface of these quantum well states, as well as their constant binding energy contours below the Fermi level E(F). The energy of the Fermi level and the size of the Fermi surface for these quantum well states could be controlled by varying the method of surface preparation. This is the first unambiguous observation that electrons in the InN accumulation layer are quantized and the first time the Fermi surface associated with such states has been measured.

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