Strain engineering in graphene by laser irradiation

Papasimakis, Nikitas; Mailis, S.; Huang, Chung‐Che; Al-Saab, F.; Hewak, Daniel W.; Luo, Zhiqiang; Shen, Zexiang

doi:10.1063/1.4907776

Cited by 9 publications

(6 citation statements)

References 29 publications

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“…To analyse the effect of laser-induced local heating and strain, we plotted ω G vs. ω 2D . In contrast to the reported upshift of ω G and ω 2D due to strain relaxation, both ω G and ω 2D downshift under laser irradiation in our experiments 37,38 . This result implies that laser-induced local heating is essential for the phase transition in TLG, and thus, the stacking order switch is thermal.…”

Section: Resultscontrasting

confidence: 99%

Light-induced irreversible structural phase transition in trilayer graphene

et al. 2020

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A crystal structure has a profound influence on the physical properties of the corresponding material. By synthesizing crystals with particular symmetries, one can strongly tune their properties, even for the same chemical configuration (compare graphite and diamond, for instance). Even more interesting opportunities arise when the structural phases of crystals can be changed dynamically through external stimulations. Such abilities, though rare, lead to a number of exciting phenomena, such as phase-change memory effects. In the case of trilayer graphene, there are two common stacking configurations (ABA and ABC) that have distinct electronic band structures and exhibit very different behaviors. Domain walls exist in the trilayer graphene with both stacking orders, showing fascinating new physics such as the quantum valley Hall effect. Extensive efforts have been dedicated to the phase engineering of trilayer graphene. However, the manipulation of domain walls to achieve precise control of local structures and properties remains a considerable challenge. Here, we experimentally demonstrate that we can switch from one structural phase to another by laser irradiation, creating domains of different shapes in trilayer graphene. The ability to control the position and orientation of the domain walls leads to fine control of the local structural phases and properties of graphene, offering a simple but effective approach to create artificial two-dimensional materials with designed atomic structures and electronic and optical properties.

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Section: Resultscontrasting

confidence: 99%

Light-induced irreversible structural phase transition in trilayer graphene

et al. 2020

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“…This modulation fades away rapidly out of the resonance frequency and is negligible for the main side lobes (at 378, 389, and 393 MHz). This also proves that the modulation observed is solely driven by the SAW strain field and rules out any thermal contribution by the laser illumination [144] and the rf dissipation. Furthermore, it demonstrates that the graphene phonons can be modulated dynamically at high frequencies by tuning the rf signal at the IDT.…”

Section: Standing-saw-modulated Raman Spectroscopysupporting

confidence: 72%

Quasiparticles in graphene and other 2D materials: modulation by a Surface acoustic wave and contribution to Coulomb drag

Fandan¹

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“…Although this is a common substrate used in the field, it is of immediate importance to reveal the possible effects that can occur on other prevalent supporting materials 18 , now including different nanoparticles (NPs).…”

Section: Introductionmentioning

confidence: 99%

Dynamic strain in gold nanoparticle supported graphene induced by focused laser irradiation

et al. 2018

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Graphene on noble-metal nanostructures constitutes an attractive nanocomposite with possible applications in sensors or energy conversion. In this work we study the properties of hybrid graphene/gold nanoparticle structures by Raman spectroscopy and scanning probe methods. The nanoparticles (NPs) were prepared by local annealing of gold thin films using a focused laser beam. The method resulted in a patterned surface, with NPs formed at arbitrarily chosen microscale areas. Graphene grown by chemical vapour deposition was transferred onto the prepared, closely spaced gold NPs. While we found that successive higher intensity (6 mW) laser irradiation increased gradually the doping and the defect concentration in SiO2 supported graphene, the same irradiation procedure did not induce such irreversible effects in the graphene supported by gold NPs. Moreover, the laser irradiation induced a dynamic hydrostatic strain in the graphene on Au NPs, which turned out to be completely reversible. These results can have implications in the development of graphene/plasmonic nanoparticle based high temperature sensors operating in dynamic regimes.

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Strain engineering in graphene by laser irradiation

Cited by 9 publications

References 29 publications

Light-induced irreversible structural phase transition in trilayer graphene

Light-induced irreversible structural phase transition in trilayer graphene

Quasiparticles in graphene and other 2D materials: modulation by a Surface acoustic wave and contribution to Coulomb drag

Dynamic strain in gold nanoparticle supported graphene induced by focused laser irradiation

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