Abstract
Three-dimensional (3D) Dirac cones are predicted to reside in semimetals A 3 Bi (A = Na, K). By using molecular beam epitaxy (MBE) and scanning tunneling microscopy (STM), we have successfully established the growth conditions for Na 3 Bi thin films on Si(1 1 1)-7 x 7, and determined that the lattice of Na 3 Bi is rotated by 30 degree with respect to that of Si(1 1 1)-7 x 7. The Na3Bi/Si(1 1 1)-7 x 7 thin film was further used as the substrate for the growth of K 3 Bi. The 3D Dirac-cone-like electronic band structures of Na 3 Bi and K 3 Bi have been clearly revealed by angle resolved photoelectron spectroscopy (ARPES).
Original language | English |
---|---|
Pages (from-to) | 213-217 |
Number of pages | 5 |
Journal | Applied Surface Science |
Volume | 327 |
DOIs | |
Publication status | Published - 1 Feb 2015 |
Externally published | Yes |
Keywords
- ARPES
- K Bi
- MBE
- Na Bi
- STM