Impact of the transport supercurrent on the density of states in the weak link

TL;DR

This paper investigates how a transport supercurrent affects the density of states in a superconducting weak link, revealing zero-energy states influenced by supercurrent and phase difference, with implications for scanning tunneling spectroscopy detection.

Contribution

It presents a theoretical analysis of supercurrent effects on the density of states in superconducting weak links, highlighting the emergence of zero-energy states near phase difference Pi.

Findings

Zero-energy states appear at the weak link due to suppressed order parameter.

Supercurrent significantly influences the density of states near phase difference Pi.

Potential detection of these effects via scanning tunneling spectroscopy is discussed.

Abstract

The impact of the transport supercurrent on the density of states in the superconducting thin film with the weak link is investigated. At the weak link the order parameter is locally suppressed due to the order parameter phase difference. This results in the appearance of the zero-energy states, which are strongly influenced by the supercurrent especially at the phase difference close to Pi. The observability of these effects with the scanning tunneling spectroscopy is discussed.