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An electronic structure perspective of graphene interfaces.

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Interfacing graphene with other materials modifies its electronic structure, enabling new phenomena. This review details how interfaces control graphene

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Graphene's unique electronic structure, with linear energy dispersion, provides exceptional transport properties.
  • Practical applications require interfacing graphene with diverse materials like 2D layers, metals, dielectrics, and organics.
  • Nanoscale interfaces are crucial for emergent phenomena and modulating graphene's electronic properties.

Purpose of the Study:

  • To review modifications to graphene's electronic structure induced by interfacing with various materials.
  • To explore methods for engineering a bandgap in graphene via interfacial hybridization.
  • To discuss experimental techniques for examining interface electronic structures and their device implications.

Main Methods:

  • Theoretical calculations and electronic spectroscopy techniques.
  • X-ray absorption fine structure (XAFS) spectroscopy.
  • Scanning transmission X-ray microscopy (STXM), angle-resolved photoemission spectroscopy (ARPES), and X-ray magnetic circular dichroism (XMCD).

Main Results:

  • Interfacing graphene with different materials significantly alters its electronic band structure.
  • Interfacial hybridization offers pathways to engineer and modulate a bandgap in graphene.
  • Geometric and electronic structures at interfaces are correlated, guiding heterostructure design.

Conclusions:

  • Understanding interfacial effects is key to harnessing graphene's potential in advanced devices.
  • Engineered graphene heterostructures have implications for plasmonics, photonics, spintronics, and composites.
  • A unified view of interface structure-property correlations enables rational design of novel materials.