Ooguri, Hirosi and Oshikawa, Masaki (2012) Instability in Magnetic Materials with a Dynamical Axion Field. Physical Review Letters, 108 (16). Art. No. 161803. ISSN 0031-9007 http://resolver.caltech.edu/CaltechAUTHORS:20120523-090211920
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It has been pointed out that axion electrodynamics exhibits instability in the presence of a background electric field. We show that the instability leads to a complete screening of an applied electric field above a certain critical value and the excess energy is converted into a magnetic field. We clarify the physical origin of the screening effect and discuss its possible experimental realization in magnetic materials where magnetic fluctuations play the role of the dynamical axion field.
|Additional Information:||© 2012 American Physical Society. Received 14 December 2011; published 20 April 2012. We thank Y. Ando, O. Bergman, J. Gauntlett, D. Hsieh, J. Maldacena, and X.-L. Qi for useful discussions. We thank the hospitality of the Aspen Center for Physics (NSF Grant No. 1066293) and the Kavli Institute for Theoretical Physics, UC Santa Barbara (NSF Grant No. PHY05-51164). The work of H. O. is supported in part by U.S. DOE Grant No. DE-FG03-92-ER40701, the WPI Initiative of MEXT of Japan, and JSPS Grant-in-Aid for Scientific Research No. C-23540285. The work of M. O. is supported in part by JSPS Grant-in-Aid for Scientific Research No. 21540381.|
|Classification Code:||PACS: 14.80.Va, 73.61.-r|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||23 May 2012 16:12|
|Last Modified:||04 Mar 2013 23:30|
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