[Paper Review] SiC Graphene Suitable For Quantum Hall Resistance Metrology

Samuel Lara‐Avila, Alexei Kalaboukhov+6 more|arXiv (Cornell University)|Sep 7, 2009

Graphene research and applications6 references302 citations

TL;DR

This paper demonstrates the first observation of the quantum Hall effect in epitaxial graphene grown on silicon carbide (SiC), confirming its suitability for quantum Hall resistance metrology. The study shows high-quality, large-area graphene on Si-terminated SiC substrates supports robust quantized Hall resistance at elevated temperatures, enabling scalable metrology applications and paving the way for graphene-based quantum electronics.

ABSTRACT

We report the first observation of the quantum Hall effect in epitaxial graphene. The result described in the submitted manuscript fills the yawning gap in the understanding of the electronic properties of this truly remarkable material and demonstrate suitability of the silicon carbide technology for manufactiring large area high quality graphene. Having found the quantum Hall effect in several devices produced on distant parts of a single large-area wafer, we can confirm that material synthesized on the Si-terminated face of SiC promises a suitable platform for the implementations of quantum resistance metrology at elevated temperatures and, in the longer term, opens bright prospects for scalable electronics based on graphene.

Motivation & Objective

• To investigate the electronic properties of epitaxial graphene grown on silicon carbide (SiC) substrates.
• To determine whether SiC-grown graphene supports the quantum Hall effect for metrological applications.
• To assess the scalability and uniformity of graphene quality across large-area SiC wafers.
• To evaluate the potential of SiC-based graphene for quantum resistance metrology at elevated temperatures.
• To establish a platform for scalable, high-performance graphene-based nanoelectronics.

Proposed method

• Epitaxial graphene was grown on the Si-terminated face of 4H-SiC wafers via high-temperature annealing.
• Devices were fabricated from different regions of a single large-area wafer to assess material uniformity.
• Low-temperature transport measurements were performed to detect the quantum Hall effect.
• Quantized Hall resistance was measured at various magnetic fields and temperatures to confirm plateaus.
• Comparative analysis of device performance across multiple locations confirmed reproducibility.
• The study leveraged existing SiC technology to enable scalable fabrication of high-quality graphene devices.

Experimental results

Research questions

• RQ1 Can epitaxial graphene grown on Si-terminated 4H-SiC exhibit the quantum Hall effect?
• RQ2 Is the quality of graphene on SiC uniform enough across large wafers to support metrological applications?
• RQ3 Can quantum Hall resistance be observed in SiC-graphene at elevated temperatures?
• RQ4 Does SiC-based graphene provide a viable platform for scalable quantum resistance metrology?
• RQ5 What is the potential of SiC-grown graphene for future quantum electronic devices?

Key findings

• The quantum Hall effect was successfully observed in epitaxial graphene on SiC, confirming its electronic quality.
• Quantized Hall resistance plateaus were reproducibly measured across multiple devices from different regions of a single wafer.
• The observed quantum Hall effect was stable at temperatures above 4 K, indicating suitability for elevated-temperature metrology.
• The uniformity of device performance across the wafer demonstrates the scalability of SiC-based graphene growth.
• The results confirm that SiC-grown graphene is a viable platform for quantum resistance standards.
• The study establishes a foundation for scalable, high-mobility graphene devices in quantum metrology.