Abstract
The observation of isolated positive and negative charges, but not isolated magnetic north and south poles, is an old puzzle. Instead, evidence of effective magnetic monopoles has been found in the abstract momentum space. Apart from Hall-related effects, few observable consequences of these abstract monopoles are known. Here, we show that it is possible to manipulate the monopoles by external magnetic fields and probe them by universal conductance fluctuation measurements in ferromagnets with strong spin-orbit coupling. The observed fluctuations are not noise, but reproducible quasiperiodic oscillations as a function of magnetization direction, a novel Berry phase fingerprint of the magnetic monopoles.
- Received 30 July 2010
DOI:https://doi.org/10.1103/PhysRevLett.105.207204
© 2010 The American Physical Society
Synopsis
Fingerprinting magnetic monopoles
Published 19 November 2010
A new probe of magnetic monopoles in momentum space is proposed.
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