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Determination of the time scale of photoemission from the measurement of spin polarization

by Mauro Fanciulli, J. Hugo Dil

Submission summary

As Contributors: Hugo Dil · Mauro Fanciulli
Arxiv Link: https://arxiv.org/abs/1806.05895v4
Date accepted: 2018-12-03
Date submitted: 2018-11-26
Submitted by: Fanciulli, Mauro
Submitted to: SciPost Physics
Domain(s): Theoretical
Subject area: Condensed Matter Physics - Theory

Abstract

The Eisenbud-Wigner-Smith (EWS) time delay of photoemission depends on the phase term of the matrix element describing the transition. Because of an interference process between partial channels, the photoelectrons acquire a spin polarization which is also related to the phase term. The analytical model for estimating the time delay by measuring the spin polarization is reviewed in this manuscript. In particular, the distinction between scattering EWS and interfering EWS time delay will be introduced, providing an insight in the chronoscopy of photoemission. The method is applied to the recent experimental data for Cu(111) presented in M. Fanciulli et al., PRL 118, 067402 (2017), allowing to give better upper and lower bounds and estimates for the EWS time delays.

Current status:

Author comments upon resubmission

Dear Editor,
According to your last request, Figure 3 has been simplified and better explained in the caption and the corresponding text. We thank you for pointing this out, since we believe that now the readability of the chapter has improved.
With kind regards,
M. Fanciulli and J. H. Dil

List of changes

- The scheme of the model for the estimate of time delay in Figure 3 is simpler and clearer than previously.
- Corresponding caption and main text about Figure 3 have been improved.
- The sentence about phases in the conclusions (page 21) has been modified in order to better convey its message.

Submission & Refereeing History

Resubmission 1806.05895v4 on 26 November 2018
Resubmission 1806.05895v3 on 24 October 2018
Resubmission 1806.05895v2 on 11 September 2018
Submission 1806.05895v1 on 19 June 2018

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