“Graphene and hBN heterostructures”

Dr. Seok Kyun Son
Department of Physics, Mokpo National University

Apr. 19 (Fri.), 04:00 PM
E6-2. 1st fl. #1323

Abstract:
The concept of van der Waals heterostructures has led to a new technology of layer-by-layer engineering of two-dimensional (2D) materials with atomic precision. Out of the abundance of 2D materials, the two – graphene and hexagonal boron nitride (hBN), still remain the most unique couple, because of their outstanding synergetic properties. The hBN plays a vital role in ultra-high quality graphene devices, and as enabling material for graphene superlattices. Besides, it is also known to protect sensitive 2D materials from environment via encapsulation.
Here, I would like to introduce my recent researches focused on graphene and 2D materials during last three years. Also, electron transport by surface acoustic waves (SAWs) in GaAs/AlGaAs for single-photon emission studied during my PhD degree will be introduced briefly which can potentially be instrumental in the implementation of scalable quantum processors and quantum repeaters, by facilitating interaction between distant qubits.
■ This seminar will deal with three main research areas: graphene based application devices, Raman spectroscopy, and single-photon device using lateral p-n junctions and SAWs.
[1] Graphene hot-electron light bulb: incandescence from hBN encapsulated graphene in air, 2D Materials, 5 (1), 011006 (2017) and ABC graphite devices (in progress, Nature)
[2] Substrate dependence of graphene reactivity towards hydrogenation, Applied Physics Letters, 109, 24 (2016) and Raman spectroscopy of electrostatically bottom-gated doping in graphene and boron nitride heterostructures (in progress, ACS Nano)
[3] Single-photon emission from an acoustically-driven lateral light-emitting diode (in progress, Nature)