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

doi:10.1016/j.physleta.2007.11.058

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

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-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 language	English (US)
Pages (from-to)	2484-2489
Number of pages	6
Journal	Physics Letters, Section A: General, Atomic and Solid State Physics
Volume	372
Issue number	14
DOIs	https://doi.org/10.1016/j.physleta.2007.11.058
State	Published - 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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Cite this

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title = "The kinetic energy dependent effective Debye temperature for CoS2 (100)",

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.",

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AU - Wu, Ning

AU - Wisbey, David

AU - Komesu, Takashi

AU - Yu, Z. X.

AU - Manno, M.

AU - Wang, L.

AU - Leighton, C.

AU - Dowben, P. A.

N1 - 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.

PY - 2008/3/31

Y1 - 2008/3/31

N2 - 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.

AB - 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.

KW - Cobalt pyrite

KW - Lattice vibrations

KW - Surface Debye temperature

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