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Angle Resolved Photoemission

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Angle Resolved Photoemission Spectroscopy of Delafossite Metals

Part of the book series: Springer Theses ((Springer Theses))

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Abstract

Photoemission spectroscopies are experimental techniques based on the photoelectric effect, first observed by Heinrich Hertz in 1887 [1]. When light of sufficiently high frequency \(\nu \) irradiates a metal, electrons with a maximum kinetic energy of \(E_{K}^{max}=h\nu -W\), where W is the material work function, can be extracted. Einstein was awarded the Nobel prize for his explanation of the effect, which relies on the wave-particle duality of light. The same basic process is used in modern experiments to gain insight into the electronic structure of solids. The current of photoelectrons is related to the electronic density of states; the larger the number of electrons that leave a sample with a given kinetic energy, the larger is the density of states at the corresponding binding energy.

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Notes

  1. 1.

    In the following I will omit the vector symbol for simplicity, and write k instead of \(\vec {k}\).

  2. 2.

    In the rest of the thesis I will plot the fitted data of this type as binding energy vs momentum, as is usually done. Here I plot the extracted momentum as a function of binding energy, in order to emphasise the way in which the data are extracted: momentum at which the intensity is maximum is found as a function of fixed binding energy.

  3. 3.

    There are many resources available to learn about pumps, pressure gauges, and other examples of UHV technology; see for example Ref. [33].

  4. 4.

    The analysed data from the same sample are shown in Chap. 6 and Appendix D. The same data, but processed, are shown in Fig. 6.1e. The physics of these states is discussed in Chap. 6; here I just use them as an example measurements.

  5. 5.

    Actually a combination of kinetic energy and emission angle, because a straight analyser entrance slit is used. This is a small enough effect not to impede any qualitative discussion, and is compensated for in the analysis, as described above.

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  1. Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

    Dr. Veronika Sunko

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Correspondence to Veronika Sunko .

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Sunko, V. (2019). Angle Resolved Photoemission. In: Angle Resolved Photoemission Spectroscopy of Delafossite Metals. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-030-31087-5_2

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