Negative magnetoresistivity in chiral fluids and holography
Entity
UAM. Departamento de Física TeóricaPublisher
SISSA; Springer VerlagDate
2015-03-24Citation
10.1007/JHEP03(2015)127
Journal of High Energy Physics 2015.3 (2015): 127
ISSN
1126-6708 (print); 1029-8479 (online)DOI
10.1007/JHEP03(2015)127Funded by
This work was supported in part by the Spanish MINECO’s “Centro de Excelencia Severo Ochoa” Programme under grant SEV-2012-0249 and Plan Nacional de Altas Energías FPA2009-07890Project
Gobierno de España. FPA2009-07890; Gobierno de España. SEV-2012-0249Editor's Version
http://dx.doi.org/10.1007/JHEP03(2015)127Subjects
Holography and condensed matter physics (AdS/CMT); Gauge-gravity correspondence; Anomalies in field and string theories; FísicaNote
Journal of High Energy Physics 2015.3 (2015): 127 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA)Rights
© 2015, The Author(s)Abstract
In four dimensions Weyl fermions possess a chiral anomaly which leads to several special features in the transport phenomena, such as the negative longitudinal mag-netoresistivity. In this paper, we study its inverse, the longitudinal magnetoconductivity, in the case of a chiral anomalous system with a background magnetic field B using the lin-ear response method in the hydrodynamic limit and from holography. Our hydrodynamic results show that in general we need to have energy, momentum and charge dissipations to get a finite DC longitudinal magnetoconductivity due to the existence of the chiral anomaly. Applying the formula that we get from hydrodynamics to the holographic system in the probe limit, we find that the result in the hydrodynamic regime matches that calculated from holography via Kubo formula. The holographic result shows that in an intermediate regime of B there is naturally a negative magnetoresistivity which decreases as 1/B. At small B direct calculations in the holographic system suggest that holography provides a new explanation for the small B positive magnetoresistivity behavior seen in experiment, i.e. the small B behavior comes from the quantum critical conductivity being affected by the chiral anomaly
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Google Scholar:Landsteiner, Karl
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Liu, Yan
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Sun, Ya-Wen
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