Tunneling effects on impurity spectral function in coupled asymmetric quantum wires
Marcos R. S. Tavares, G. -Q. Hai, G. E. Marques
Abstract
The impurity spectral function is studied in coupled double quantum wires at finite temperatures. Simple anisotropy in the confinement direction of the wires leads to finite non-diagonal elements of the impurity spectral function matrix. These non-diagonal elements are responsible for tunneling effects and result in pronounced extra peak in the impurity spectral function up to temperatures as high as 20 K.
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