# Single crystal growth and magnetoresistivity study of topological semimetal CoSi

## TL;DR

This study reports the successful growth of CoSi single crystals and investigates their magnetoresistivity, revealing quantum oscillations consistent with topological semimetal properties and providing insights into their electronic structure.

## Contribution

It presents the first detailed analysis of quantum oscillations in CoSi crystals, linking experimental results with band structure calculations for topological semimetals.

## Key findings

- Observation of Shubnikov-de Haas oscillations in CoSi
- Identification of two isotropic bulk electron Fermi surfaces
- Extraction of effective mass and scattering rates

## Abstract

We report single crystal growth of CoSi, which has recently been recognized as a new type of topological semimetal hosting fourfold and sixfold degenerate nodes. The Shubnikov-de Haas quantum oscillation (QO) is observed on our crystals. There are two frequencies originating from almost isotropic bulk electron Fermi surfaces, in accordance with band structure calculations. The effective mass, scattering rate, and QO phase difference of the two frequencies are extracted and discussed.