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Phys. Rev. Lett. 76, 1695–1698 (1996)

Non-Gaussian Distribution of Coulomb Blockade Peak Heights in Quantum Dots

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A. M. Chang1, H. U. Baranger1, L. N. Pfeiffer1, K. W. West1, and T. Y. Chang2
1AT&T Bell Laboratories, 600 Mountain Avenue, Murray Hill, New Jersey 07974-0636
2AT&T Bell Laboratories, Crawfords Corner Road, Holmdel, New Jersey 07733

Received 26 July 1995; published in the issue dated 4 March 1996

We have observed a strongly non-Gaussian distribution of Coulomb blockade conductance peak heights for tunneling through quantum dots. At zero magnetic field, a low-conductance spike dominates the distribution; the distribution at nonzero field is distinctly different and still non-Gaussian. The observed distributions are consistent with theoretical predictions based on single-level tunneling and the concept of “quantum chaos” in a closed system weakly coupled to leads.

© 1996 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.76.1695
DOI:
10.1103/PhysRevLett.76.1695
PACS:
72.20.My, 05.45.+b, 73.20.Dx, 73.23.Hk