Observation of the quantum valley Hall state in ballistic graphene superlattices

Author:

Komatsu Katsuyosih1ORCID,Morita Yoshifumi2ORCID,Watanabe Eiichiro3ORCID,Tsuya Daiju3ORCID,Watanabe Kenji4ORCID,Taniguchi Takashi4,Moriyama Satoshi1ORCID

Affiliation:

1. International Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan.

2. Faculty of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan.

3. Nanofabrication Platform, NIMS, Tsukuba, Ibaraki 305-0047, Japan.

4. Research Center for Functional Materials, NIMS, Tsukuba, Ibaraki 305-0044, Japan.

Abstract

A new state of matter “quantum valley Hall state” is observed by the nonlocal transport in a massive Dirac fermion.

Funder

Ministry of Education, Culture, Sports, Science, and Technology

JSPS KAKENHI

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference42 articles.

1. Quantal phase factors accompanying adiabatic changes;Berry M. V.;Proc. R. Soc. A,1984

2. Valley filter and valley valve in graphene;Rycerz A.;Nat. Phys.,2007

3. Charge, spin and valley Hall effects in disordered graphene;Cresti A.;Riv. Nuovo Cimento,2016

4. Quantized Hall conductivity in two dimensions;Laughlin R. B.;Phys. Rev. B,1981

5. Quantized Hall Conductance in a Two-Dimensional Periodic Potential

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