Strain-induced quantum Hall phenomena of excitons in graphene

Oleg L Berman; Roman Ya Kezerashvili; Yurii E Lozovik; Klaus G Ziegler

doi:10.1038/s41598-022-06486-z

Strain-induced quantum Hall phenomena of excitons in graphene

Sci Rep. 2022 Feb 22;12(1):2950. doi: 10.1038/s41598-022-06486-z.

Authors

Oleg L Berman^{1

2}, Roman Ya Kezerashvili^{3

4}, Yurii E Lozovik^{5

6}, Klaus G Ziegler⁷

Affiliations

¹ Physics Department, New York City College of Technology, The City University of New York, Brooklyn, NY, 11201, USA.
² The Graduate School and University Center, The City University of New York, New York, NY, 10016, USA.
³ Physics Department, New York City College of Technology, The City University of New York, Brooklyn, NY, 11201, USA. rkezerashvili@citytech.cuny.edu.
⁴ The Graduate School and University Center, The City University of New York, New York, NY, 10016, USA. rkezerashvili@citytech.cuny.edu.
⁵ Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow, Russia, 142190.
⁶ Research University Higher School of Economics, Moscow, Russia, 101000.
⁷ Institut für Physik, Universität Augsburg, 86135, Augsburg, Germany.

Abstract

We study direct and indirect pseudomagnetoexcitons, formed by an electron and a hole in the layers of gapped graphene under strain-induced gauge pseudomagnetic field. Since the strain-induced pseudomagnetic field acts on electrons and holes the same way, it occurs that the properties of single pseudomagnetoexcitons, their collective effects and phase diagram are cardinally different from those of magnetoexcitons in a real magnetic field. We have derived wave functions and energy spectrum of direct in a monolayer and indirect pseudomagnetoexcitons in a double layer of gapped graphene. The quantum Hall effect for direct and indirect excitons was predicted in the monolayers and double layers of gapped graphene under strain-induced gauge pseudomagnetic field, correspondingly.

Abstract

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