A new spin-polarized photoemission spectrometer with very high efficiency and energy resolution

Okuda, Taichi; Takeichi, Yasuo; Maeda, Yuuki; Harasawa, Ayumi; Matsuda, Iwao; Kinoshita, Toyohiko; Kakizaki, Akito
December 2008
Review of Scientific Instruments;Dec2008, Vol. 79 Issue 12, p123117
Academic Journal
A new spin- and angle-resolved photoemission spectrometer was developed adopting the very-low-energy-electron-diffraction (VLEED)-type spin polarimeter. The Fe(001)p(1×1)–O film grown on MgO(001) crystal for the VLEED target yields significantly high spin-resolving power, the effective Sherman function of 0.40±0.02, with long lifetime and stability compared to the conventional Fe(001) target. Under the favor of high resolving power, approximately 100 times higher efficiency than that of conventional Mott-type spin polarimeter, the figure of merit of 1.9±0.2×10-2 was achieved. Owing to this high efficiency, high-energy resolution can be realized with this new spin-polarized photoemission spectrometer. The simplified ways of target preparation and revitalization make the VLEED spin polarimeter much more convenient and feasible for the spin-polarized photoemission spectroscopy.


Related Articles

  • Observation of two- and three-dimensional magnesium oxide nanostructures formed by thermal treatment of magnesium diboride powder. Klug, Kevin L.; Dravid, Vinayak P. // Applied Physics Letters;8/26/2002, Vol. 81 Issue 9, p1687 

    A simple thermal treatment has been used to produce a variety of elongated single crystalline magnesium oxide nanostructures. Incipient evaporation of a magnesium diboride starting powder combined with a mixed oxygen/argon process gas provided the constituents for nanostructure growth. Electron...

  • Ultrahigh-resolution spin-resolved photoemission spectrometer with a mini Mott detector. Souma, S.; Takayama, A.; Sugawara, K.; Sato, T.; Takahashi, T. // Review of Scientific Instruments;Sep2010, Vol. 81 Issue 9, p095101 

    We have developed an ultrahigh-resolution spin-resolved photoemission spectrometer with a highly efficient mini Mott detector and an intense xenon plasma discharge lamp. The spectrometer achieves the energy resolutions of 0.9 and 8 meV for non-spin-resolved and spin-resolved modes, respectively....

  • Preparation of single-crystal-like MgO films on Si and orientation control of platinum films on MgO/Si. Chen, T.L.; Li, X.M.; Zhang, X. // Applied Physics A: Materials Science & Processing;2004, Vol. 79 Issue 8, p1857 

    Growth of a Pt/MgO bilayer on Si(100) was investigated by pulsed-laser deposition. The growth modes of both MgO and platinum films are layer-by-layer growth, which were revealed by in situ reflection high energy electron diffraction observations. Two kinds of orientations of platinum films, viz....

  • Photoemission study of the SiO2 conversion mechanism to magnesium silicate. Casey, Patrick; Hughes, Greg // Journal of Applied Physics;Apr2010, Vol. 107 Issue 7, p074107 

    The objective of this work is to investigate interface chemistries which minimize the interfacial silicon oxide transition region at Si/high-k dielectric interfaces. We report on the mechanism by which a silicon native oxide layer is converted into magnesium silicate. The deposition of metal Mg...

  • A photoelectron spectrometer for k-space mapping above the Fermi level. Greber, T.; Raetzo, O.; Kreutz, T.J.; Schwaller, P.; Deichmann, W.; Wetli, E.; Osterwalder, J. // Review of Scientific Instruments;Dec1997, Vol. 68 Issue 12, p4549 

    Describes the setup of an electron spectrometer for angle-resolved photoemission. Exploitation of a monochromatized high flux He discharge photon source; Quantification of the dispersion of the Shockley surface state on AG(111) above the Fermi energy.

  • Normal incidence grating spectrometer designed for inverse photoemission studies in the range 10–30 eV. Johnson, P. D.; Hulbert, S. L.; Garrett, R. F.; Howells, M. R. // Review of Scientific Instruments;Jul1986, Vol. 57 Issue 7, p1324 

    We describe a normal incidence grating spectrometer for use in inverse photoemission studies of surfaces. We show that by operating in a configuration where the source and image are displaced from the Rowland Circle it is possible to construct a useful spectrometer that can be attached to any...

  • Realization of an electron spectrometer using a toroidal magnetic deflector. Lévêque, G.; Robin, J. // Review of Scientific Instruments;Aug1987, Vol. 58 Issue 8, p1456 

    We present some aspects of the realization of a new angular resolved photoemission spectrometer using a magnetic deflector. The photoelectrons are dispersed according to their energy and emission angle and focused onto a detector where the band structure appears in real time. The prototype has...

  • A time-of-flight–Mott apparatus for soft x-ray spin resolved photoemission on solid samples. Moreschini, L.; Ghiringhelli, G.; Larsson, K.; Veit, U.; Brookes, N. B. // Review of Scientific Instruments;Mar2008, Vol. 79 Issue 3, p033905 

    We describe a new spectrometer for spin resolved photoemission from solids in the soft x-ray energy range. It is mounted on the ID08 beamline at the ESRF light source and consists of a time-of-flight (TOF) energy analyzer coupled to a retarding mini-Mott spin polarimeter. It represents a valid...

  • Photoemission study of the Fe(001)/MgO interface for varying oxidation conditions of magnesium oxide. Müller, Martina; Matthes, Frank; Schneider, Claus M. // Journal of Applied Physics;5/1/2007, Vol. 101 Issue 9, p09G519 

    The nature of interface bonding essentially determines the spin polarization of tunneling currents through ferromagnet/insulator interfaces. We focus on the influence of ultrathin off-stoichiometric MgO coverages on the spin-polarized electronic structure of the (001) surface of bcc-Fe. By...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics