Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms
Can a gas of spin-up and spin-down fermions become ferromagnetic because of repulsive interactions? We addressed this question, for which there is not yet a definitive theoretical answer, in an experiment with an ultracold two-component Fermi gas. The observation of nonmonotonic behavior of lifetime...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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American Association for the Advancement of Science (AAAS)
2014
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| Online Access: | http://hdl.handle.net/1721.1/88507 https://orcid.org/0000-0001-5697-1496 https://orcid.org/0000-0002-9528-3044 |
| _version_ | 1826191394396438528 |
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| author | Jo, Gyu-Boong Lee, Ye-Ryoung Choi, Jae-Hoon Christensen, Caleb A. Kim, Tony Hyun Pritchard, David E. Ketterle, Wolfgang Thywissen, Joseph H. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Jo, Gyu-Boong Lee, Ye-Ryoung Choi, Jae-Hoon Christensen, Caleb A. Kim, Tony Hyun Pritchard, David E. Ketterle, Wolfgang Thywissen, Joseph H. |
| author_sort | Jo, Gyu-Boong |
| collection | MIT |
| description | Can a gas of spin-up and spin-down fermions become ferromagnetic because of repulsive interactions? We addressed this question, for which there is not yet a definitive theoretical answer, in an experiment with an ultracold two-component Fermi gas. The observation of nonmonotonic behavior of lifetime, kinetic energy, and size for increasing repulsive interactions provides strong evidence for a phase transition to a ferromagnetic state. Our observations imply that itinerant ferromagnetism of delocalized fermions is possible without lattice and band structure, and our data validate the most basic model for ferromagnetism introduced by Stoner. |
| first_indexed | 2024-09-23T08:55:13Z |
| format | Article |
| id | mit-1721.1/88507 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:55:13Z |
| publishDate | 2014 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | dspace |
| spelling | mit-1721.1/885072022-09-30T12:09:42Z Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms Jo, Gyu-Boong Lee, Ye-Ryoung Choi, Jae-Hoon Christensen, Caleb A. Kim, Tony Hyun Pritchard, David E. Ketterle, Wolfgang Thywissen, Joseph H. Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Research Laboratory of Electronics MIT-Harvard Center for Ultracold Atoms Jo, Gyu-Boong Lee, Ye-Ryoung Choi, Jae-Hoon Christensen, Caleb A. Kim, Tony Hyun Pritchard, David E. Ketterle, Wolfgang Can a gas of spin-up and spin-down fermions become ferromagnetic because of repulsive interactions? We addressed this question, for which there is not yet a definitive theoretical answer, in an experiment with an ultracold two-component Fermi gas. The observation of nonmonotonic behavior of lifetime, kinetic energy, and size for increasing repulsive interactions provides strong evidence for a phase transition to a ferromagnetic state. Our observations imply that itinerant ferromagnetism of delocalized fermions is possible without lattice and band structure, and our data validate the most basic model for ferromagnetism introduced by Stoner. National Science Foundation (U.S.) United States. Office of Naval Research. Multidisciplinary University Research Initiative. United States. Army Research Office (Contract W911NF-07-1-0493) United States. Defense Advanced Research Projects Agency. Optical Lattice Emulator Program 2014-07-28T14:57:22Z 2014-07-28T14:57:22Z 2009-09 2009-06 Article http://purl.org/eprint/type/JournalArticle 0036-8075 1095-9203 http://hdl.handle.net/1721.1/88507 Jo, G.-B., Y.-R. Lee, J.-H. Choi, C. A. Christensen, T. H. Kim, J. H. Thywissen, D. E. Pritchard, and W. Ketterle. “Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms.” Science 325, no. 5947 (September 18, 2009): 1521–1524. https://orcid.org/0000-0001-5697-1496 https://orcid.org/0000-0002-9528-3044 en_US http://dx.doi.org/10.1126/science.1177112 Science Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf American Association for the Advancement of Science (AAAS) arXiv |
| spellingShingle | Jo, Gyu-Boong Lee, Ye-Ryoung Choi, Jae-Hoon Christensen, Caleb A. Kim, Tony Hyun Pritchard, David E. Ketterle, Wolfgang Thywissen, Joseph H. Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms |
| title | Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms |
| title_full | Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms |
| title_fullStr | Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms |
| title_full_unstemmed | Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms |
| title_short | Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms |
| title_sort | itinerant ferromagnetism in a fermi gas of ultracold atoms |
| url | http://hdl.handle.net/1721.1/88507 https://orcid.org/0000-0001-5697-1496 https://orcid.org/0000-0002-9528-3044 |
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