Far-from-equilibrium monopole dynamics in spin ice
Far-from-equilibrium monopole dynamics in spin ice
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DOI:
10.1038/nphys2847
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发表时间:
2014-02-01
期刊:
影响因子:
19.6
通讯作者:
Bramwell, S. T.
中科院分区:
文献类型:
--
作者:
Paulsen, C.;Jackson, M. J.;Bramwell, S. T.
Condensed matter in the low-temperature limit reveals exotic physics associated with unusual orders and excitations, with examples ranging from helium superfluidity(1) to magnetic monopoles in spin ice(2,3). The far-from-equilibrium physics of such low-temperature states may be even more exotic, yet to access it in the laboratory remains a challenge. Here we demonstrate a simple and robust technique the 'magnetothermal avalanche quench' and its use in the controlled creation of non-equilibrium populations of magnetic monopoles in spin ice at millikelvin temperatures. These populations are found to exhibit spontaneous dynamical effects that typify far-from-equilibrium systems and yet are captured by simple models. Our method thus opens new directions in the study of far-from-equilibrium states in spin ice and other exotic magnets.