A.c. transport and collective excitation in a quantum point contact

PDF Version Also Available for Download.

Description

The authors calculate the a.c.-admittance of a two dimensional quantum point contact (QPC) using a Boltzmann-like kinetic equation derived for the partial Wigner distribution function. An integral equation for a potential inside a QPC is solved numerically. The dependence of the admittance on the frequency of the a.c. field is found in a wide frequency range {omega} {approx} 0--50 GHz. The contribution to the imaginary part of the admittance due to the quantum capacitance and inductance is numerically calculated. It is shown that the crossover from localized parameters--quantum capacitance and inductance--to distributed behavior takes place at {omega} {approximately} 10 GHz. ... continued below

Physical Description

10 p.

Creation Information

Berman, G.P.; Doolen, G.D.; Mainieri, R.; Aronov, I.E.; Campbell, D.K.; Beletskii, N.N. et al. February 1, 1998.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Authors

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

The authors calculate the a.c.-admittance of a two dimensional quantum point contact (QPC) using a Boltzmann-like kinetic equation derived for the partial Wigner distribution function. An integral equation for a potential inside a QPC is solved numerically. The dependence of the admittance on the frequency of the a.c. field is found in a wide frequency range {omega} {approx} 0--50 GHz. The contribution to the imaginary part of the admittance due to the quantum capacitance and inductance is numerically calculated. It is shown that the crossover from localized parameters--quantum capacitance and inductance--to distributed behavior takes place at {omega} {approximately} 10 GHz. A transition from 2D plasmons to quasi-1D plasmons is analyzed as a function of two dimensionless parameters: k{sub x}d{sub 0} (where k{sub x} is the longitudinal wave vector, and d{sub 0} is the width of the QPC), and the number of open electron channels, N.

Physical Description

10 p.

Notes

OSTI as DE98003366

Source

  • 2. international workshop on surfaces and interfaces of mesoscopic devices, Kaanapalli, HI (United States), 7-12 Dec 1997

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Other: DE98003366
  • Report No.: LA-UR--97-4751
  • Report No.: CONF-971230--
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/671983 | External Link
  • Office of Scientific & Technical Information Report Number: 671983
  • Archival Resource Key: ark:/67531/metadc711190

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • February 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

Description Last Updated

  • May 5, 2016, 6:19 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 1

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Berman, G.P.; Doolen, G.D.; Mainieri, R.; Aronov, I.E.; Campbell, D.K.; Beletskii, N.N. et al. A.c. transport and collective excitation in a quantum point contact, report, February 1, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc711190/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.