Hogan, PM;
Green, AG;
(2008)
Universal nonlinear conductivity close to an itinerant-electron quantum critical point.
Physical Review B
, 78
(19)
, Article 195104. 10.1103/PhysRevB.78.195104.
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Abstract
We study the conductivity in itinerant-electron systems near to a magnetic quantum critical point. We show that, for a class of geometries, the universal power-law dependence of resistivity upon temperature may be reflected in a universal nonlinear conductivity; when a strong electric field is applied, the resulting current has a universal power-law dependence upon the applied electric field. For a system with thermal-equilibrium current proportional to T-alpha and dynamical exponent z, we find a nonlinear resistivity proportional to E(z-1)/[z(1+alpha)-1].
| Type: | Article |
|---|---|
| Title: | Universal nonlinear conductivity close to an itinerant-electron quantum critical point |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.78.195104 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevB.78.195104 |
| Language: | English |
| Additional information: | © APS 2008 |
| Keywords: | Band model of magnetism, Electrical conductivity, Ferromagnetism, Magnetic transitions, Nonzero-temperature, Fluctuations |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1333465 |
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