The kinetic energy dependent effective Debye temperature for CoS2 (100)

Ning Wu, David Wisbey, Takashi Komesu, Z. X. Yu, M. Manno, L. Wang, C. Leighton, P. A. Dowben

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

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 languageEnglish (US)
Pages (from-to)2484-2489
Number of pages6
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume372
Issue number14
DOIs
StatePublished - Mar 31 2008

Bibliographical note

Funding 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.

Keywords

  • Cobalt pyrite
  • Lattice vibrations
  • Surface Debye temperature

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