A New Spin on Photoemission Spectroscopy Page: 4 of 259


A New Spin on Photoemission Spectroscopy
Christopher Matthew Jozwiak
Doctor of Philosophy in Physics
University of California, Berkeley
Professor Alessandra Lanzara, Chair
The electronic spin degree of freedom is of general fundamental importance to all matter.
Understanding its complex roles and behavior in the solid state, particularly in highly
correlated and magnetic materials, has grown increasingly desirable as technology demands
advanced devices and materials based on ever stricter comprehension and control of the
electron spin. However, direct and efficient spin dependent probes of electronic structure
are currently lacking.
Angle Resolved Photoemission Spectroscopy (ARPES) has become one of the most
successful experimental tools for elucidating solid state electronic structures, bolstered by
continual breakthroughs in efficient instrumentation. In contrast, spin-resolved photoemis-
sion spectroscopy has lagged behind due to a lack of similar instrumental advances. The
power of photoemission spectroscopy and the pertinence of electronic spin in the current
research climate combine to make breakthroughs in Spin and Angle Resolved Photoemission
Spectroscopy (SARPES) a high priority .
This thesis details the development of a unique instrument for efficient SARPES and rep-
resents a radical departure from conventional methods. A custom designed spin polarimeter
based on low energy exchange scattering is developed, with projected efficiency gains of two
orders of magnitude over current state-of-the-art polarimeters. For energy analysis, the


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Jozwiak, Chris. A New Spin on Photoemission Spectroscopy, thesis or dissertation, December 1, 2008; United States. (https://digital.library.unt.edu/ark:/67531/metadc1014237/m1/4/ocr/: accessed March 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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