# Magically strained bilayer graphene with flat bands

## TL;DR

This paper proposes a new strained bilayer graphene system that naturally exhibits flat electronic bands at the Fermi level, potentially enabling superconductivity and offering a more feasible platform than twisted bilayer graphene.

## Contribution

It introduces a novel method of inducing flat bands in bilayer graphene through uniaxial strain, avoiding the need for precise twisting angles.

## Key findings

- Flat bands occur at the intrinsic Fermi level under certain strain conditions.
- The system forms a triangular lattice of stacking regions with distinct stacking types.
- Large energy gaps separate the flat bands from other bands.

## Abstract

Twist bilayer graphenes with magical angle have nearly flat band, which become strongly correlated electron systems. Herein, we propose another system based on strained bilayer graphene that have flat band at the intrinsic Fermi level. The top and bottom layers are uniaxially stretched along different directions. When the strength and directions of the strain satisfy certain condition, the periodical lattices of the two layers are commensurate to each other. The regions with AA, AB and BA stacking arrange in a triangular lattice. With magical strain, the bands around the intrinsic Fermi level are nearly flat and have large gap from the other bands. This system could provide more feasible platform for graphene-based integrated electronic system with superconductivity.