Frequency Dependence of Shot Noise in Resonant Diodes under Coherent Tunneling

• Authors: V. Aleshkin , L. Reggiani , M. Rosini
• Languages of publication: EN

Abstracts

EN

The current spectral density and the Fano factor of a resonant diode are investigated as a function of frequency up to values just below the inverse of the transit time. We consider the case of coherent tunneling for a symmetric double barrier structure at voltages up to the first current peak at 77 K. At high frequencies the Fano factor is found to become suppressed systematically at a value of 0.25 independently of frequency. This suppression below 0.5 is an indication of coherent against sequential tunneling transport.

Keywords

EN

72.70.+m; 72.20.-i; 72.30.+q; 73.23.Ad

Discipline

• 73.23.Ad: Ballistic transport
• 72.70.+m: Noise processes and phenomena
• 72.30.+q: High-frequency effects; plasma effects
• 72.20.-i: Conductivity phenomena in semiconductors and insulators(see also 66.70.-f Nonelectronic thermal conduction and heat-pulse propagation in solids; thermal waves)

• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 107
• Issue: 2
• Pages: 298-303

Dates

published

2005-02

received

2004-08-22

Contributors

author

V. Aleshkin

• Institute for Physics of Microstructures, Nizhny Novgorod GSP-105 603600, Russia

author

L. Reggiani

• National Nanotechnology Laboratory of INFM, Dipartimento di Ingegneria dell' Innovazione, Università di Lecce, via Arnesano s/n, 73100 Lecce, Italy

author

M. Rosini

• National Nanotechnology Laboratory of INFM, Dipartimento di Ingegneria dell' Innovazione, Università di Lecce, via Arnesano s/n, 73100 Lecce, Italy

References

• 1. V.Ya. Aleshkin, L. Reggiani, N.V. Alkeev, V.E. Lyubchenko, C.N. Ironside, J.M.L. Figuerido, C.R. Stanley, cond-matter/0304077 (2003), Phys. Rev. B, 70, 115321, 2004
• 2. D.V. Averin, J. Appl. Phys., 73, 2593, 1993
• 3. Y.M. Blanter, M. Buttiker, Phys. Rev. B, 59, 10217, 1999
• 4. Y. Wei, B. Wang, J. Wang, H. Guo, Phys. Rev. B, 60, 16900, 1999
• 5. G. Iannaccone, M. Macucci, B. Pellegrini, Phys. Rev. B, 55, 4539, 1997

Identifiers

DOI

10.12693/APhysPolA.107.298