Title:	One-step model of photoemission at finite temperatures: Spin fluctuations of Fe(001)
Authors:	Minár, Jan Mankovsky, Sergey Braun, Juergen Ebert, Hubert
Citation:	MINÁR, J., MANKOVSKY, S., BRAUN, J., EBERT, H. One-step model of photoemission at finite temperatures: Spin fluctuations of Fe(001). Physical Review B, 2020, roč. 102, č. 3. ISSN 2469-9950.
Issue Date:	2020
Publisher:	American Physical Society
Document type:	článek article
URI:	http://hdl.handle.net/11025/39626
ISSN:	2469-9950
Keywords in different language:	ELECTRONIC-STRUCTURE;RESOLVED PHOTOEMISSION;EXCHANGE INTERACTIONS;LATTICE DISTORTION;DILUTE ALLOYS;FE;METALS;1ST-PRINCIPLES;FERROMAGNETISM;DEPENDENCE
Abstract in different language:	Various technical developments have extended the potential of angle-resolved photoemission spectroscopy (ARPES) tremendously over the last 20 years. In particular improved momentum, energy, and spin resolution as well as the use of photon energies from a few eV up to several keV make ARPES a rather unique tool to investigate the electronic properties of solids and surfaces. With our work we present a generalization of the state-of-the-art description of the photoemission process, the so-called one-step model that describes excitation, transport to the surface, and escape into the vacuum in a coherent way. In particular, we present a theoretical description of temperature-dependent ARPES with a special emphasis on spin fluctuations. Finite-temperature effects are included within the so-called alloy analogy model which is based on the coherent potential approximation, and this method allows us to describe uncorrelated lattice vibrations in combination with spin fluctuations quantitatively on the same level of accuracy. To demonstrate the applicability of our approach a corresponding numerical analysis has been applied to spin- and angle-resolved photoemission of Fe(100) at finite temperatures.
Rights:	Plný text není přístupný. © American Physical Society
Appears in Collections:	Články / Articles (RAM) OBD

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