TY  - JOUR
AU  - Esat, Taner
AU  - Lechtenberg, Benedikt
AU  - Deilmann, Thorsten
AU  - Wagner, Christian
AU  - Krüger, Peter
AU  - Temirov, Ruslan
AU  - Rohlfing, Michael
AU  - Anders, Frithjof B.
AU  - Tautz, F. S.
TI  - A chemically driven quantum phase transition in a two-molecule Kondo system
JO  - Nature physics
VL  - 12
IS  - 9
SN  - 1745-2481
CY  - Basingstoke
PB  - Nature Publishing Group
M1  - FZJ-2016-05158
SP  - 867 - 873
PY  - 2016
AB  - The magnetic properties of nanostructures that consist of a small number of atoms or molecules are typically determined by magnetic exchange interactions. Here, we show that non-magnetic, chemical interactions can have a similarly decisive effect if spin-moment-carrying orbitals extend in space and therefore allow the direct coupling of magnetic properties to wavefunction overlap and the formation of bonding and antibonding orbitals. We demonstrate this for a dimer of metal–molecule complexes on the Au(111) surface. A changing wavefunction overlap between the two monomers drives the surface-adsorbed dimer through a quantum phase transition from an underscreened triplet to a singlet ground state, with one configuration being located extremely close to a quantum critical point.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000383219800015
DO  - DOI:10.1038/nphys3737
UR  - https://juser.fz-juelich.de/record/819515
ER  -