Electron Traversal Times in Disordered Graphene Nanoribbons

Area of Science:

• Condensed Matter Physics
• Materials Science
• Quantum Transport

Background:

• Graphene nanoribbons (GNRs) are promising materials for electronic devices.
• Understanding electron transport dynamics is crucial for device performance.
• Molecular junctions offer tunable electronic properties.

Purpose of the Study:

• To investigate electron traversal times in GNR molecular junctions.
• To analyze the impact of disorder and orientation on electron transport.
• To provide insights for designing high-frequency GNR-based devices.

Main Methods:

• Utilizing the partition-free time-dependent Landauer-Büttiker formalism.
• Calculating transient current correlations.
• Simulating electron transport across GNR molecular junctions.

Main Results:

• Electron traversal times exhibit distinct signatures.
• These signatures are sensitive to the degree of disorder in the GNR.
• Electron transit behavior varies with the GNR's orientation.
• Demonstrated correlation between traversal times and device operational frequencies.

Conclusions:

• Electron traversal in GNR junctions is influenced by structural disorder and orientation.
• These findings are relevant for optimizing the operational frequencies of GNR devices.
• Provides a pathway for the rational design of advanced GNR-based electronic components.