# Ubiquitous non-Majorana Zero-Bias Conductance Peaks in Nanowire Devices

## TL;DR

This study reveals that zero-bias conductance peaks in nanowire devices, previously attributed to Majorana bound states, can also arise from trivial subgap states, emphasizing the need for careful interpretation in Majorana research.

## Contribution

The paper introduces a multiband model explaining zero-bias peaks as trivial phenomena, challenging the assumption that all such peaks indicate Majorana states.

## Key findings

- Zero-bias peaks are common and not exclusive to Majorana states.
- Trivial subgap states can produce zero-bias conductance peaks.
- A multiband model explains the origin of these peaks.

## Abstract

We perform tunneling measurements on indium antimonide nanowire/superconductor hybrid devices fabricated for the studies of Majorana bound states. At finite magnetic field, resonances that strongly resemble Majorana bound states, including zero-bias pinning, become common to the point of ubiquity. Since Majorana bound states are predicted in only a limited parameter range in nanowire devices, we seek an alternative explanation for the observed zero-bias peaks. With the help of a self-consistent Poission-Schr\"odinger multiband model developed in parallel, we identify several families of trivial subgap states which overlap and interact, giving rise to a crowded spectrum near zero energy and zero-bias conductance peaks in experiments. These findings advance the search for Majorana bound states through improved understanding of broader phenomena found in superconductor-semiconductor systems.