Article,
Have mysterious topological valley currents been observed in graphene superlattices?
Contributors
Roche S.
0000-0003-0323-4665
(Corresponding author)
[1]
[2]
Power S.R.
0000-0003-4566-628X
[3]
[4]
Nikolic B.K.
0000-0002-5793-7764
[5]
Garcia J.H.
0000-0002-5752-4759
[2]
Jauho A.-P.
0000-0002-9105-7859
[6]
Affiliations
- [1] ICREA [NORA names: Spain; Europe, EU; OECD];
- [2] Catalan Institute of Nanoscience and Nanotechnology (ICN2) [NORA names: Spain; Europe, EU; OECD];
- [3] Dublin City University [NORA names: Ireland; Europe, EU; OECD];
- [4] Trinity College Dublin [NORA names: Ireland; Europe, EU; OECD];
- [5] University of Delaware [NORA names: United States; America, North; OECD];
(... more)
Abstract
We provide a critical discussion concerning the claim of topological valley currents, driven by a global Berry curvature and valley Hall effect proposed in recent literature. After pointing out a major inconsistency of the theoretical scenario proposed to interpret giant nonlocal resistance, we discuss various possible alternative explanations and open directions of research to solve the mystery of nonlocal transport in graphene superlattices.
Keywords
Graphene,
Graphene superlattices,
Nonlocal resistance,
Topological valley currents
