# Helical quantum Hall phase in graphene on SrTiO3

@article{Veyrat2020HelicalQH, title={Helical quantum Hall phase in graphene on SrTiO3}, author={Louis Veyrat and Corentin D{\'e}prez and Alexis Coissard and Xiaoxi Li and Fr{\'e}d{\'e}ric Gay and Kenji Watanabe and Takashi Taniguchi and Zheng Vitto Han and Benjamin A. Piot and Hermann Sellier and Benjamin Sac'ep'e}, journal={Science}, year={2020}, volume={367}, pages={781 - 786} }

Controlling the interactions Near charge neutrality and subject to perpendicular magnetic fields, graphene is expected to become a ferromagnet with edge states not unlike those in two-dimensional topological insulators. Observing this effect experimentally has proven tricky because very large magnetic fields are needed to overcome the effect of electron-electron interactions, which drive the system to competing states. Instead of amping up the field, Veyrat et al. placed their graphene samples…

## 39 Citations

### Imaging tunable quantum Hall broken-symmetry orders in graphene.

- PhysicsNature
- 2022

ABSTARCT
When electrons populate a flat band their kinetic energy becomes negligible, forcing them to organize in exotic many-body states to minimize their Coulomb energy1-5. The zeroth Landau level…

### Absence of edge reconstruction for quantum Hall edge channels in graphene devices

- Physics
- 2022

Electronic edge states in topological insulators have become a major paradigm in physics. The oldest and primary example is that of quantum Hall (QH) edge channels that propagate along the periphery…

### Particle-hole symmetry broken solutions in graphene nanoribbons: A multi-orbital, mean-field perspective

- PhysicsPhysical Review B
- 2022

Mean-field theories have since long predicted edge magnetism in graphene nanoribbons, where the order parameter is given by the local magnetization. However, signatures of edge magnetism appears…

### Compact SQUID Realized in a Double-Layer Graphene Heterostructure.

- PhysicsNano letters
- 2020

A compact double-layer graphene SQUID (superconducting quantum interference device), where the superconducting loop is reduced to the superconductor contacts connecting two parallel graphene Josephson junctions, which measures a well-defined conductance plateau of 2e2/h indicative of counter-propagating edge channels in the two layers.

### Magnetic-field-induced robust zero Hall plateau state in MnBi2Te4 Chern insulator

- PhysicsNature communications
- 2021

Transport studies of exfoliated MnBi2Te4 flakes in pulsed magnetic fields up to 61.5 T demonstrate the intricate interplay among intrinsic magnetic order, external magnetic field, and nontrivial band topology in MnBi 2Te4.

### GRAPHENE IN A UNIFORM MAGNETIC FIELD

- Physics
- 2020

We study monolayer graphene in a uniform magnetic field in the absence and presence of interactions. In the non-interacting limit for p/q flux quanta per unit cell, the central two bands (that…

### Imaging field-tuned quantum Hall broken-symmetry orders and quantum Hall conducting channel in charge-neutral graphene WSe2 heterostructure

- Physics
- 2021

The zeroth Landau level (0LL) in graphene has emerged as a flat-band platform in which distinct many-body phases can be explored with unprecedented control by simply tuning the strength and/or…

### Quantum Monte Carlo at the graphene quantum Hall edge

- PhysicsPhysical Review B
- 2022

We study a continuum model of the interface of graphene and vacuum in the quantum hall regime via sign-problem-free quantum Monte Carlo, allowing us to investigate the interplay of topology and…

### Crossed Andreev reflection in spin-polarized chiral edge states due to the Meissner effect

- PhysicsPhysical Review B
- 2022

We consider a hybrid quantum Hall-superconductor system, where a superconducting ﬁnger with oblique proﬁle is wedged into a two-dimensional electron gas in the presence of a perpendicular magnetic…

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