Universal Scaling in Nonequilibrium Transport through a Single Channel Kondo Dot

M. Grobis, I. G. Rau, R. M. Potok, H. Shtrikman, and D. Goldhaber-Gordon

Phys. Rev. Lett. 100, 246601 – Published 16 June 2008

Abstract

Scaling laws and universality play an important role in our understanding of critical phenomena and the Kondo effect. We present measurements of nonequilibrium transport through a single-channel Kondo quantum dot at low temperature and bias. We find that the low-energy Kondo conductance is consistent with universality between temperature and bias and is characterized by a quadratic scaling exponent, as expected for the spin- $\frac{1}{2}$ Kondo effect. We show that the nonequilibrium Kondo transport measurements are well described by a universal scaling function with two scaling parameters.

Received 16 October 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.246601

Authors & Affiliations

M. Grobis¹, I. G. Rau², R. M. Potok^1,3,*, H. Shtrikman⁴, and D. Goldhaber-Gordon^1,†

¹Department of Physics, Stanford University, Stanford, California 94305, USA
²Department of Applied Physics, Stanford University, Stanford, California 94305, USA
³Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
⁴Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 96100, Israel

^*Present address: Advanced Micro Devices, Austin, TX, USA.
^†Corresponding author. goldhaber-gordon@stanford.edu

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 100, Iss. 24 — 20 June 2008

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review Letters