AVS 51st International Symposium
    Surface Science Monday Sessions
       Session SS1-MoM

Paper SS1-MoM11
Spin-Resolved Plasmon Dispersion of Gd(0001)

Monday, November 15, 2004, 11:40 am, Room 210B

Session: Electronic Structure and Excitations
Presenter: H.-K. Jeong, University of Nebraska-Lincoln
Authors: H.-K. Jeong, University of Nebraska-Lincoln
D.S. Wisbey, University of Nebraska-Lincoln
P.A. Dowben, University of Nebraska-Lincoln
Correspondent: Click to Email
The spin-resolved plasmon dispersion, Ep(k//), of Gd(0001) on Mo(112) was investigated using spin-polarized electron energy loss spectroscopy. In spin polarized electron spectroscopy, the spin majority band structure of Gd(0001) exhibits different electron-phonon coupling than spin minority. There is some modest indirect evidence from the effective higher Debye temperature [1] derived from the spin minority bands than from the majority bands, but the compelling evidence arises from the spin dependence plasmon structure. Spin-polarized plasmon dispersion was observed. In addition to the spin-resolved plasmon dispersion, Ep(k//), we will show plasmon energies are dependent on primary energies and temperature. [1] Hae-Kyung Jeong, R. Skomski, C. Waldfried, Takashi Komesu, P. A. Dowben, E. Vescovo, "The Effective Spin Dependent Debye Temperature of Gd(0001)", accepted Physics Letters A (2004).