Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102335
Title: Tuning emergent magnetism in a Hund's impurity
Authors: Khajetoorians, A. A.
Valentyuk, M.
Steinbrecher, M.
Schlenk, T.
Shick, A.
Kolorenc, J.
Lichtenstein, A. I.
Wehling, T. O.
Wiesendanger, R.
Wiebe, J.
Issue Date: 2015
Publisher: Nature Publishing Group
Citation: Tuning emergent magnetism in a Hund's impurity / A. A. Khajetoorians, M. Valentyuk, M. Steinbrecher, et al. — DOI 10.1038/nnano.2015.193 // Nature Nanotechnology. — 2015. — Vol. 10. — Iss. 11. — P. 958-964.
Abstract: The recently proposed concept of a Hund's metal - a metal in which electron correlations are driven by Hund's rule coupling - can be used to explain the exotic magnetic and electronic behaviour of strongly correlated electron systems of multi-orbital metallic materials. Tuning the abundance of parameters that determine these materials is, however, experimentally challenging. Here, we show that the basic constituent of a Hund's metal - a Hund's impurity - can be realized using a single iron atom adsorbed on a platinum surface, a system that comprises a magnetic moment in the presence of strong charge fluctuations. The magnetic properties can be controlled by using the tip of a scanning tunnelling microscope to change the binding site and degree of hydrogenation of the 3d transition-metal atom. We are able to experimentally explore a regime of four almost degenerate energy scales (Zeeman energy, temperature, Kondo temperature and magnetic anisotropy) and probe the magnetic excitations with the microscope tip. The regime of our Hund's impurity can be tuned from an emergent magnetic moment to a multi-orbital Kondo state, and the system could be used to test predictions of advanced many-body theories for non-Fermi liquids in quantum magnets or unconventional superconductors. © 2015 Macmillan Publishers Limited. All rights reserved.
Keywords: FERMI LIQUIDS
MAGNETIC MOMENTS
QUANTUM THEORY
TRANSITION METALS
TUNING
3D TRANSITION METALS
CHARGE FLUCTUATIONS
HUND'S RULE COUPLINGS
KONDO TEMPERATURES
MAGNETIC EXCITATIONS
NON-FERMI LIQUIDS
STRONGLY CORRELATED ELECTRON SYSTEM
UNCONVENTIONAL SUPERCONDUCTORS
MAGNETIC ANISOTROPY
HYDROGEN
IRON DERIVATIVE
PLATINUM DERIVATIVE
ADSORPTION
ANISOTROPY
ARTICLE
ATOMIC PARTICLE
BINDING SITE
CHEMICAL PARAMETERS
CONTROLLED STUDY
DEGENERATION
DENSITY FUNCTIONAL THEORY
ELECTRIC POTENTIAL
ELECTRON
EXCITATION
HUND IMPURITY
HYBRIDIZATION
HYDROGENATION
LOW TEMPERATURE
MAGNETISM
PHYSICAL CHEMISTRY
PRIORITY JOURNAL
SCANNING TUNNELING MICROSCOPY
SIMULATION
SURFACE PROPERTY
TEMPERATURE DEPENDENCE
URI: http://hdl.handle.net/10995/102335
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84946559090
PURE ID: 553314
fb6fcbbe-c3f7-4a71-a1ee-3d384b3a97a6
ISSN: 17483387
DOI: 10.1038/nnano.2015.193
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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