Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-09-17
Supplementary information of nature, 453, 633-637, 2008
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
14 pages, 6 figures
Scientific paper
Quantum criticality is the intriguing possibility offered by the laws of quantum mechanics when the wave function of a many-particle physical system is forced to evolve continuously between two distinct, competing ground states. This phenomenon, often related to a zero-temperature magnetic phase transition, can be observed in several strongly correlated materials such as heavy fermion compounds or possibly high-temperature superconductors, and is believed to govern many of their fascinating, yet still unexplained properties. In contrast to these bulk materials with very complex electronic structure, artificial nanoscale devices could offer a new and simpler vista to the comprehension of quantum phase transitions. This long-sought possibility is demonstrated by our work in a fullerene molecular junction, where gate voltage induces a crossing of singlet and triplet spin states at zero magnetic field. Electronic tunneling from metallic contacts into the $\rm{C_{60}}$ quantum dot provides here the necessary many-body correlations to observe a true quantum critical behavior.
Balestro Franck
Bouchiat Vincent
Florens Serge
Roch Nicolas
Wernsdorfer Wolfgang
No associations
LandOfFree
Supplementary Information: Quantum phase transition in a single-molecule quantum dot does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Supplementary Information: Quantum phase transition in a single-molecule quantum dot, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Supplementary Information: Quantum phase transition in a single-molecule quantum dot will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-661749