The effective Debye temperatures of the highly spin-polarized material CoS2 were measured using temperature dependent low energy electron diffraction and shown to be dependent upon electron kinetic energy. The normal dynamic motion of the (100) surface results in the effective surface Debye temperature of 326 ± 9 K compared to a bulk Debye temperature of 612 ± 24 K. Similar values for the bulk Debye temperature have been obtained through LEED I(V) analysis and core level photoemission with a lower value for the bulk Debye temperature found from heat capacity measurements.
|Original language||English (US)|
|Number of pages||6|
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|State||Published - Mar 31 2008|
Bibliographical noteFunding Information:
This research was supported through the ONR Grant No. N00014-06-1-0616, the Nebraska Research Initiative and the NSF “QSPINS” MRSEC (DMR 0213808) at UNL, the work at UMN was supported by the NSF MRSEC under DMR-0212302. The authors acknowledge the assistance of M.A. van Hove and Danqin Feng and helpful discussions with Kirill Belashchenko and Wei-Ning Mei.
- Cobalt pyrite
- Lattice vibrations
- Surface Debye temperature