Spielman, I. B. and Eisenstein, J. P. and Pfeiffer, L. N. and West, K. W. (2001) Observation of a linearly dispersing collective mode in a quantum Hall ferromagnet. Physical Review Letters, 87 (3). Art. No. 036803. ISSN 0031-9007. https://resolver.caltech.edu/CaltechAUTHORS:SPIprl01
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Abstract
Double-layer two-dimensional electron systems can exhibit a fascinating collective phase believed to display both quantum ferromagnetism and excitonic superfluidity. This unusual phase has recently been found to exhibit tunneling phenomena reminiscent of the Josephson effect. A key element of the theoretical understanding of this bizarre quantum fluid is the existence of linearly dispersing Goldstone collective modes. Using the method of tunneling spectroscopy, we have demonstrated the existence of these modes. We find the measured velocity to be in reasonable agreement with theoretical estimates.
| Item Type: | Article | |||||||||
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| Additional Information: | © 2001 The American Physical Society. Received 21 December 2000; published 2 July 2001. It is a pleasure to acknowledge fruitful discussions with Steve Girvin, Allan MacDonald, Ady Stern, and Misha Fogler. This work was supported by the NSF under Grant No. DMR0070890 and the DOE under Grant No. DEFG03-99ER45766. One of us (I.B.S.) acknowledges support from the Department of Defense. | |||||||||
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| Subject Keywords: | PHASE-TRANSITIONS; SYSTEMS; BARRIER | |||||||||
| Issue or Number: | 3 | |||||||||
| Record Number: | CaltechAUTHORS:SPIprl01 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:SPIprl01 | |||||||||
| Alternative URL: | http://dx.doi.org/10.1103/PhysRevLett.87.036803 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 3028 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 11 May 2006 | |||||||||
| Last Modified: | 02 Oct 2019 22:59 |
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