Strain Engineering of Graphene Electronic Properties

Graphene’s remarkable combination of mechanical flexibility, high carrier mobility and unique two-dimensional electronic structure has made it a focal point for strain engineering approaches aimed at tailoring its properties for next-generation devices. By precisely applying uniaxial, biaxial or localised deformation, researchers can modulate the π-electron overlap between carbon atoms, leading to changes in band structure such as Dirac cone tilting, strain-induced bandgaps or the emergence of pseudo-magnetic fields. Controlled strain patterns enable tuning of charge carrier dynamics, valley polarisation and optoelectronic responses, with potential applications in flexible electronics, valleytronics, tunable sensors and quantum devices. Advances in substrate patterning, nanobubble formation, thin-film shrinkage and heterostructure design have allowed unprecedented control over strain magnitude and spatial distribution. Moreover, the interplay between strain, interlayer coupling in bilayer or multilayer systems and external stimuli such as light or gate fields has opened avenues for dynamic and reversible modulation of electronic states. Globally, strain engineering is positioned as a versatile tool to bridge fundamental physics with practical applications, from low-power logic elements to tunable photonic components.

Research from Nature Portfolio

Programmable atomic force microscopy has been used to create graphene nanobubbles with user-defined size and geometry, generating large three-fold symmetric pseudo-magnetic fields that emulate high-field regimes unattainable by conventional magnets. This level of control over local curvature and associated pseudo-fields provides a platform for exploring strain-induced Landau quantisation and offers routes to engineer artificial magnetic lattices in two dimensions.

Time-resolved infrared pump–probe spectroscopy applied to periodically distorted graphene on nanopillar arrays has revealed that strain-induced pseudo-magnetic fields of the order of 100 tesla can dramatically slow hot-carrier relaxation by over an order of magnitude. Such slowed carrier dynamics point to new mechanisms for optoelectronic modulation and signal processing in strained graphene systems.

Strain Engineering of Graphene Electronic Properties publication trend

The graph below shows the total number of articles in strain engineering of graphene electronic properties across all publications each year (not limited to Nature Index journals).

Technical terms

Strain engineering: The deliberate application of mechanical deformation to alter the electronic structure of a material.

Pseudo-magnetic field: An effective magnetic field experienced by charge carriers in graphene due to non-uniform lattice strain.

Valley degree of freedom: The quantum label of electrons residing at inequivalent energy extrema (K and K′ points) in the band structure.

Dirac cone: The linear energy–momentum dispersion relation near graphene’s charge neutrality points.

Heterostructure: A stacked assembly of different two-dimensional materials enabling combined or emergent electronic behaviours.

References

1. Mechanical, electronic, optical, piezoelectric and ferroic properties of strained graphene and other strained monolayers and multilayers: an update. Reports on Progress in Physics (2023).
2. Programmable graphene nanobubbles with three-fold symmetric pseudo-magnetic fields. Nature Communications (2019).
3. Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene. Nature Communications (2021).
4. Self‐Assembly of Organic Semiconductors on Strained Graphene under Strain‐Induced Pseudo‐Electric Fields. Advanced Science (2024).
5. Graphene binding on black phosphorus enables high on/off ratios and mobility. National Science Review (2023).