Shot noise in transport through quantum dots: ballistic versus diffractive scattering

Stefan Rotter; Florian Aigner; Joachim Burgdörfer

doi:10.1117/12.725646

8 June 2007 Shot noise in transport through quantum dots: ballistic versus diffractive scattering

Stefan Rotter, Florian Aigner, Joachim Burgdörfer

Proceedings Volume 6600, Noise and Fluctuations in Circuits, Devices, and Materials; 660006 (2007) https://doi.org/10.1117/12.725646
Event: SPIE Fourth International Symposium on Fluctuations and Noise, 2007, Florence, Italy

Abstract

We investigate the shot noise in phase-coherent transport through quantum cavities by a two dimensional ab-initio simulation of the scattering problem. In particular, we study the influence of quantum scattering mechanisms on the transport statistics by tuning the strength of a disorder potential and the openings of the dot. For small cavity openings we find the shot noise for disordered samples to be of almost equal magnitude as for clean samples where transport is ballistic. We explain this finding by diffractive scattering at the cavity openings which act as strong noise sources. For ballistic cavities we demonstrate the emergence of "noiseless scattering states", irrespective of sharp-edged entrance and exit lead mouths. Our numerical results for the onset thresholds of these "classical" states are in very good agreement with analytical estimates.

Citation Download Citation

Stefan Rotter, Florian Aigner, and Joachim Burgdörfer "Shot noise in transport through quantum dots: ballistic versus diffractive scattering", Proc. SPIE 6600, Noise and Fluctuations in Circuits, Devices, and Materials, 660006 (8 June 2007); https://doi.org/10.1117/12.725646

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available