We propose a systematic procedure to directly extract the Eliashberg function
for electron-phonon coupling from high-resolution angle-resolved photoemission
data. The procedure is successfully applied to the Be(1010) surface, providing
new insights to electron-phonon coupling at this surface. The method is shown
to be robust against imperfections in experimental data and suitable for wider
applications.Comment: 4 pages, 4 figures. More details concerning the procedure are
  include

Brouet, V.

Hussain, Z.

Plummer, E. W.

Shen, Z. -X.

Shi, Junren

Sprunger, P. T.

Tang, S. -J

Wu, Biao

Yang, W. L.

Zhang, Zhenyu

Zhou, X. J.

English

arXiv

A systematic procedure to directly extract the Eliashberg function for electron-phonon coupling was discussed using the high resolution angle-resolved photoemission spectroscopy (ARPES) data. Systematic tests were carried out to assess the effects of various parameters involved in the fitting and the robustness of the procedure against data imperfections. It was shown that the maximum entropy method (MEM) was used to overcome the data imperfections and numerical instability. It was found that ARPES allowed wider applicability and measurements along different directions compared to other traditional tunneling methods

Tang, S. J.

Shen, Z. X.

LSU Scholarly Repository (Louisiana State Univ.)

Direct extraction of the eliashberg function for electron-phonon coupling: A case study of be(1010̄)

Direct extraction of the Eliashberg function for electron-phonon
  coupling: A case study of Be(1010)

Direct extraction of the Eliashberg function for electron-phonon coupling: A case study of Be(1010)

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LSU Scholarly Repository (Louisiana State Univ.)