Open AccessNano-manipulation and laser treatment as alternative routes for strain engineering in Graphene
Author(s) -
C.E. Coleman,
Rudolph M. Erasmus,
Davie Mtsuko,
Svetlana von Gratowski,
В. В. Коледов,
S. P. Bhattacharyya
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1461/1/012024
Subject(s) - graphene , materials science , raman spectroscopy , graphite , nanotechnology , laser , phonon , strain (injury) , doping , nano , laser power scaling , graphene nanoribbons , optoelectronics , condensed matter physics , composite material , optics , physics , medicine
In this work we present two alternative routes for strain engineering in graphene. The first technique involves a laser treatment a low power that was found to create micro-bubbles on single layer graphene flakes. The effect of strain and doping of the graphene along these micro-bubbles is mapped and analysed using Raman Spectroscopy and it is found that a pronounced split in the G-band phonon mode can be attributed to large strain induction. The second technique discussed involves the use of nano-manipulating probes to manoeuvre and deform multilayer graphene flakes. Devices fabricated from such deformed flakes exhibit transport deviating from the expected 2D/quasi-2D electron gas observed in single layer graphene and graphite. We observe signatures of quantum linear magnetoresistance up to large fields in such devices.