Zero-bias anomaly in one-dimensional tunneling contacts

TL;DR

This paper investigates how Coulomb interactions affect tunneling conductance in one-dimensional quantum wire contacts, revealing that low-voltage anomalies are less singular than density of states anomalies across various wire configurations.

Contribution

It provides a comparative analysis of Coulomb interaction effects on tunneling conductance in different quantum wire contact setups, including clean, disordered, and asymmetric configurations.

Findings

Low-voltage tunneling conductance anomalies are less singular than density of states anomalies.

Disorder and asymmetry in wires influence the conductance behavior.

The study highlights the robustness of conductance features against different wire conditions.

Abstract

We study the Coulomb interaction effects on the tunneling conductance of a contact constructed of two parallel quantum wires. The following contacts are considered: two clean identical quantum wires, two disordered identical quantum wires, and asymmetric contact of one clean and another disordered quantum wires. We show that the low-voltage anomaly of the tunneling conductance is less singular than the low-energy anomaly of the one-particle density of states.