A New Spin on Photoemission Spectroscopy Page: 81 of 259
This thesis or dissertation is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
(a) Ag(111) L-Gap Surface State by PES
A) -eimann , a/ 1977
)P a- 1995 0 - X-"
/ W1 0.5
evan lift 197 t 50 0 U
C)jia.- 19 1i 0 H 3 -.1 00 .
GXang(Y95 ) k, (nia) 9
D) Nicoloy if1 2000 E,
200 100 100 50 0 -0
binding energy [mi eV]
Figure 2.14. (a)ARPES EDCs of the Ag(111) L-gap surface state from several prominent
publications over the years. Figure taken from ref. 75. (b)ARPES derived band dispersion
of Bi2Sr2CaCu2O8s+ taken in 1993 in ref. 76. (c)ARPES derived dispersion taken in 2000
in ref. 77 with a 2D SES-200 spectrometer showing fine features which are not visible in
(b). Data points from (b) are overlaid as squares for direct comparison in (c). Panels (b)
and (c) taken from ref. 78.
increasingly higher energy and angular resolutions possible, both of which are required to
measure the extremely sharp EDC at the bottom (the bottom spectrum was taken with
energy and angular resolutions of 3.5 meV and 0.150, respectively). Actually achieving
this sharp a feature allows studying physics at a scale that is otherwise impossible. As an
example of this, Figure 2.14(b) shows the ARPES EDC derived dispersion from a HTC
superconductor taken in 1993 with energy and angular resolutions of 45 meV and 1,
respectively. Due to low efficiency, only 5 data points along this direction were included.
Panel (c) shows a similar data set taken in 2000 using a high efficiency SDA with a 2D mul-
tichannel PSD. The increased efficiency allows hundreds of data points to be simultaneously
taken along the dispersion with energy and angular resolutions of 14 meV and 0.10, re-
spectively. The famous "kink" in the dispersion, and all its related physics,30 would clearly
never have been observed without these gains in efficiency and resolution. Much of what is
presently possible with the ARPES technique is due to the high efficiency of the SDA with
2D multichannel PSD spectrometers.
Here’s what’s next.
This document can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Thesis Or Dissertation.
Jozwiak, Chris. A New Spin on Photoemission Spectroscopy, thesis or dissertation, December 1, 2008; United States. (https://digital.library.unt.edu/ark:/67531/metadc1014237/m1/81/: accessed April 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.