Investigation of Pressure Induced Formation of Diamondene
Abstract
Pressure is a convenient thermodynamic parameter for obtaining new materials that cannot be synthesized under ambient conditions. For instance, theoretical calculations show that when two layers of graphene are compressed at high-pressures in the presence of specific chemical groups, they can be turned into a 2D diamond called diamondene: a ferromagnetic semiconductor with spin-polarized bands. Efforts to experimentally demonstrate this structure are in the initial stages, yet we have already obtained robust results. In this initial work, we obtained indirect evidence of diamondene formation at room temperature by compressing two layers of graphene using water as a pressure transmitting medium (PTM) in a diamond anvil cell (DAC). The phase transition was identified by measuring the G band dispersion with laser energy as a function of pressure. We will report our progress in investigating this phase transition with new experimental evidences.
L.G.P.M and J.K acknowledge the support from the Air Force Office of Scientific Research under the MURI-FATE program, Grant No. FA9550-15-1-0514. L.G.P.M, D.L, M.S.M, R.M, M.M acknowledge the support from CNPQ.- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..MARE17002P