Kondo temperature evaluated from linear conductance in magnetic fields
PHYSICAL REVIEW B(2023)
Abstract
We theoretically and experimentally study the universal scaling property of the spin-21 Kondo state in the magnetic field dependence of bias-voltage linear conductance through a quantum dot at low temperatures. We discuss an efficient and reliable procedure to evaluate the Kondo temperature defined at the ground state from experimental or numerical data sets of the magnetic field dependence of the linear conductance or the magnetization of the quantum dot. This procedure is helpful for quantitative comparison of the theory and the experiment, and useful in Kondo-correlated systems where temperature control over a wide range is difficult, such as for cold atoms. We demonstrate its application to experimentally measure electric current through a carbon nanotube quantum dot.
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Key words
kondo temperature,linear conductance,magnetic
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