Physics – Condensed Matter – Quantum Gases
Scientific paper
2011-10-11
Nature 480, 75 (2011)
Physics
Condensed Matter
Quantum Gases
Scientific paper
10.1038/nature10627
Pairing of fermions is ubiquitous in nature and it is responsible for a large variety of fascinating phenomena like superconductivity, superfluidity of $^3$He, the anomalous rotation of neutron stars, and the BEC-BCS crossover in strongly interacting Fermi gases. When confined to two dimensions, interacting many-body systems bear even more subtle effects, many of which lack understanding at a fundamental level. Most striking is the, yet unexplained, effect of high-temperature superconductivity in cuprates, which is intimately related to the two-dimensional geometry of the crystal structure. In particular, the questions how many-body pairing is established at high temperature and whether it precedes superconductivity are crucial to be answered. Here, we report on the observation of pairing in a harmonically trapped two-dimensional atomic Fermi gas in the regime of strong coupling. We perform momentum-resolved photoemission spectroscopy, analogous to ARPES in the solid state, to measure the spectral function of the gas and we detect a many-body pairing gap above the superfluid transition temperature. Our observations mark a significant step in the emulation of layered two-dimensional strongly correlated superconductors using ultracold atomic gases.
Feld Michael
Fröhlich Bernd
Köhl Michael
Koschorreck Marco
Vogt Enrico
No associations
LandOfFree
Observation of a pairing pseudogap in a two-dimensional Fermi gas 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 Observation of a pairing pseudogap in a two-dimensional Fermi gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observation of a pairing pseudogap in a two-dimensional Fermi gas will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-472278