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Title: Valley-dependent Lorentz force and Aharonov-Bohm phase in strained graphene p - n junction

Abstract

Veselago lens focusing in graphene p-n junction is promising for realizations of new generation electron optics devices. However, the effect of the strain-induced Aharonov-Bohm interference in a p-n junction has not been discussed before. We provide an experimentally feasible setup based on the Veselago lens in which the presence of strain can result in both the valley-dependent Lorentz force and Aharonov-Bohm interference. Inparticular, by employing the Green’s function and tight-binding methods, we study the strain induced by dislocations and line defects in a p-n junction and show how the resulting Aharonov-Bohm phase and interference can be detected. Furthermore, for a different strain configuration, e.g., corresponding to corrugated graphene, we find strong signatures of valley splitting induced by the fictitious magnetic field. Our proposal can be useful for mapping elastic deformations and defects, and for studying valley-dependent effects in graphene.

Authors:
 [1];  [2];  [3];  [2]
  1. Univ. of Nebraska, Lincoln, NE (United States). Nebraska Center for Materials and Nanoscience, Dept. of Physics and Astronomy; Wilfrid Laurier Univ., Waterloo, ON (Canada). MS2Discovery Interdisciplinary Research Inst., M2NeT Lab.
  2. Univ. of Nebraska, Lincoln, NE (United States). Nebraska Center for Materials and Nanoscience, Dept. of Physics and Astronomy
  3. Wilfrid Laurier Univ., Waterloo, ON (Canada). MS2Discovery Interdisciplinary Research Inst., M2NeT Lab.; BCAM, Alameda Mazarredo, Bilbao (Spain)
Publication Date:
Research Org.:
Univ. of Nebraska, Lincoln, NE (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1505379
Grant/Contract Number:  
SC0014189
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 9; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Prabhakar, Sanjay, Nepal, Rabindra, Melnik, Roderick, and Kovalev, Alexey A. Valley-dependent Lorentz force and Aharonov-Bohm phase in strained graphene p-n junction. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.99.094111.
Prabhakar, Sanjay, Nepal, Rabindra, Melnik, Roderick, & Kovalev, Alexey A. Valley-dependent Lorentz force and Aharonov-Bohm phase in strained graphene p-n junction. United States. doi:10.1103/PhysRevB.99.094111.
Prabhakar, Sanjay, Nepal, Rabindra, Melnik, Roderick, and Kovalev, Alexey A. Wed . "Valley-dependent Lorentz force and Aharonov-Bohm phase in strained graphene p-n junction". United States. doi:10.1103/PhysRevB.99.094111. https://www.osti.gov/servlets/purl/1505379.
@article{osti_1505379,
title = {Valley-dependent Lorentz force and Aharonov-Bohm phase in strained graphene p-n junction},
author = {Prabhakar, Sanjay and Nepal, Rabindra and Melnik, Roderick and Kovalev, Alexey A.},
abstractNote = {Veselago lens focusing in graphene p-n junction is promising for realizations of new generation electron optics devices. However, the effect of the strain-induced Aharonov-Bohm interference in a p-n junction has not been discussed before. We provide an experimentally feasible setup based on the Veselago lens in which the presence of strain can result in both the valley-dependent Lorentz force and Aharonov-Bohm interference. Inparticular, by employing the Green’s function and tight-binding methods, we study the strain induced by dislocations and line defects in a p-n junction and show how the resulting Aharonov-Bohm phase and interference can be detected. Furthermore, for a different strain configuration, e.g., corresponding to corrugated graphene, we find strong signatures of valley splitting induced by the fictitious magnetic field. Our proposal can be useful for mapping elastic deformations and defects, and for studying valley-dependent effects in graphene.},
doi = {10.1103/PhysRevB.99.094111},
journal = {Physical Review B},
number = 9,
volume = 99,
place = {United States},
year = {2019},
month = {3}
}

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    Works referencing / citing this record:

    Anomalous caustics and Veselago focusing in 8- Pmmn borophene pn junctions with arbitrary junction directions
    journal, October 2019


    Quantum Hall Response to Time-Dependent Strain Gradients in Graphene
    journal, January 2020