One-dimensional contacts: Bridging the three-dimensional and...
Mon, Oct 07
2:00 PM — 3:15 PM
Steinman HallSteinman Hall 160 - Lecture Hall
Steinman Hall, 160 - Lecture Hall
The Chemical Engineering Department would like to welcome Professor Cory Dean from CCNYTitle:
One-dimensional contacts: Bridging the three-dimensional and two-dimensional worlds
The capability to assemble two-dimensional (2D) materials with complementary properties into layered heterogeneous structures presents an exciting new opportunity in materials design. For example, encapsulating graphene with BN yields enhanced transport properties with reduced environmental sensitivity, and provides the capability for complex band structure engineering. Integrating graphene with transition metal dichalcogenides (TMDCs) enables novel tunneling devices and photoactive hybrid materials for flexible electronics. However, the development of device fabrication processes for 2D materials is still in its infancy and several fundamental challenges remain. In particular, successful device engineering depends critically on the ability to make good electrical contact to the encapsulated 2D layers. In this talk I discuss a new device topology where 3D metal electrodes contact encapsulated 2D layers via a 1D interface. We find that this novel contact geometry outperforms conventional surface contacts, in spite of the carrier injection being limited to 1 single 1D atomic chain. Implications for the development of new device geometries and performance will be discussed.
Cory Dean is a newly appointed assistant professor of Physics at CCNY. Previously he was an NSERC postdoctoral fellow at Columbia University appointed between the departments of Electrical Engineering and Mechanical Engineering where he studied electrical properties of graphene. In 2009 he earned is PhD in Physics at McGill University in Montreal, where he studied the fractional quantum Hall effect in ultrahigh mobility GaAs. Previously he earned at Master’s in Physics at Queen’s University in Ontario, Canada, where he studied materials science, thin film growth and characterization and graphite intercalation compounds. Professor Dean continues to studying transport properties of 2D systems. His current interest lies in pursuing new electron behaviour in heterostructures fabricated by assembly of complimentary materials.