Direct band gap carbon superlattices with efficient optical transition
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2016-02-04 |
| Journal | Physical review. B./Physical review. B |
| Authors | Young Jun Oh, Sunghyun Kim, InāHo Lee, Jooyoung Lee, K. J. Chang |
| Institutions | Korea Advanced Institute of Science and Technology, Korea Research Institute of Standards and Science |
| Citations | 15 |
Abstract
Section titled āAbstractāWe report pure carbon-based superlattices that exhibit direct band gaps and\nexcellent optical absorption and emission properties at the threshold energy.\nThe structures are nearly identical to that of cubic diamond except that\ndefective layers characterized by five- and seven-membered rings are\nintercalated in the diamond lattice. The direct band gaps lie in the range of\n5.65.9 eV, corresponding to wavelengths of 210221 nm. The dipole matrix\nelements of direct optical transition are comparable to that of GaN, suggesting\nthat the superlattices are promising materials as an efficient deep ultraviolet\nlight emitter. Molecular dynamics simulations show that the superlattices are\nthermally stable even at a high temperature of 2000 K. We provide a possible\nroute to the synthesis of superlattices through wafer bonding of diamond (100)\nsurfaces.\n