Marc Janoschek
(Laboratory for Scientific Developments and Novel Materials, Paul Scherrer Institut, Villigen PSI, Switzerland)
Martin Boehm
(Institut Laue-Langevin, 38042 Grenoble, Cedex 9 , France)
Neutron spectroscopy is a powerful tool to study magnetic excitations arising from correlation effects of electrons. Less well known is that neutrons can also be used to investigate directly electronic band structures in strongly correlated metallic quantum matter(1). Neutrons scatter electrons form occupied to unoccupied states with a probability given by the so-called Lindhard susceptibility. Although weak in nature, the recent progress in neutron optics on different spectrometers makes now such kind of spectroscopy accessible, as demonstrated e.g. on the strongly correlated metals URu2Si2 and Pu(2). Compared to ARPES, electronic neutron spectroscopy has the advantage of enhanced energetic resolution and can be combined with high magnetic fields.
In the frame of the recent inter neutron facility initiative LENS, The League of Advanced European Neutron Sources, we propose to combine electronic spectroscopy with up-to-date unreached continuous magnetic fields on neutron spectrometers, based on all superconducting coils with split-coil geometry. For best signal-to-noise special focusing optics will be included into the magnetic design, optimized with latest Monte Carlo ray-tracing tools combined with finite element calculations. This project is planned as one out of several Priority Actions of LENS, aiming to push the neutron science in Europe to highest standards.
[1] J. F. Cooke et al., Phys Rev B 26, 4410 (1982).
[2] M. Janoschek et al., Sci Adv 1, e1500188 (2015).
Marc Janoschek
(Laboratory for Scientific Developments and Novel Materials, Paul Scherrer Institut, Villigen PSI, Switzerland)
Martin Boehm
(Institut Laue-Langevin, 38042 Grenoble, Cedex 9 , France)
Eddy Lelièvre-Berna
(Institut Laue-Langevin, 38042 Grenoble, Cedex 9 , France)
Marek Bartkowiak
(Laboratory for Scientific Developments and Novel Materials, Paul Scherrer Institut, Villigen PSI, Switzerland)
Uwe Filges
(Laboratory for Scientific Developments and Novel Materials, Paul Scherrer Institut, Villigen PSI, Switzerland)
Oliver Kirstein
(European Spallation Source, Box 176, S-221 00 Lund, Sweden)
Robert Bewley
(ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Harwell Campus, Didcot OX110QX, United Kingdom)
Jörg Voigt
(Jülich Centre for Neutron Science, Forschungszentrum Jülich GmbH, Jülich, Germany )
Peter Link
(Heinz Maier-Leibnitz Zentrum Garching, Technische Universität München, D-85748 Garching, Germany)
Oleg Kirichek
(ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Harwell Campus, Didcot OX110QX, United Kingdom)
Marko Marton
(Department of Neutron Spectroscopy, Research Institute for Solid State Physics and Optics, P.O.B. 49, H-1525 Budapest, Hungary)
Jürgen Peters
(Heinz Maier-Leibnitz Zentrum Garching, Technische Universität München, D-85748 Garching, Germany)
Alexander Holmes
(European Spallation Source, Box 176, S-221 00 Lund, Sweden)
Alexander Weber
(Jülich Centre for Neutron Science, Forschungszentrum Jülich GmbH, Jülich, Germany )
Peter Willendrup
(Department of Physics, Technical University of Denmark, Denmark)
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