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THE ENERGY-DEPENDENCE OF THE CONDUCTANCE AND SCATTERING WAVE-FUNCTIONS OF A 2D QUANTUM-DOT
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UNSPECIFIED (1995) THE ENERGY-DEPENDENCE OF THE CONDUCTANCE AND SCATTERING WAVE-FUNCTIONS OF A 2D QUANTUM-DOT. JOURNAL OF PHYSICS-CONDENSED MATTER, 7 (33). pp. 6717-6726. ISSN 0953-8984.
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Abstract
A new wave-function matching formalism is used to calculate wave functions psi and the conductance g(12) for a quantum dot as functions of the Fermi wavelength lambda. The dot is formed in a 2D quantum wire with hard walls by pushing in through one wall two identical, hard-wall, rectangular fingers with height h, width d and separation s. Calculations of conductance g(12) are made for a structure which exhibits two resonant tunnelling peaks below the nominal transmission threshold over the tops of the fingers. These peaks are associated with the open-ended organ pipe modes in the region between the fingers. The two longest organ pipe resonant wavelengths are within 2% and 10% of the calculated peak positions, but wave-function spillage over the tops of the fingers and the space between them has a marked effect on both the resonant wave functions and the resonant wavelengths. Contour plots of \psi\(2) for scattering waves are presented and used to elucidate the behaviour of g(12).
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | JOURNAL OF PHYSICS-CONDENSED MATTER | ||||
Publisher: | IOP PUBLISHING LTD | ||||
ISSN: | 0953-8984 | ||||
Official Date: | 14 August 1995 | ||||
Dates: |
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Volume: | 7 | ||||
Number: | 33 | ||||
Number of Pages: | 10 | ||||
Page Range: | pp. 6717-6726 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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