Time-reversal symmetry breaking and spontaneous Hall effect without magnetic dipole order

Yo Machida, Satoru Nakatsuji (), Shigeki Onoda, Takashi Tayama and Toshiro Sakakibara
Additional contact information
Yo Machida: Institute for Solid State Physics, University of Tokyo
Satoru Nakatsuji: Institute for Solid State Physics, University of Tokyo
Shigeki Onoda: Condensed Matter Theory Laboratory, RIKEN, Wako 351-0198, Japan
Takashi Tayama: Institute for Solid State Physics, University of Tokyo
Toshiro Sakakibara: Institute for Solid State Physics, University of Tokyo

Nature, 2010, vol. 463, issue 7278, 210-213

Abstract: A thaw in the spin ice Chiral spin liquids are a long-sought hypothetical class of spin liquids — spin systems in frustrated magnets that neither freeze nor order even at T = 0 — in which time-reversal symmetry is macroscopically broken even in the absence of an applied magnetic field or any magnetic dipole long-range order. Machida et al. report an investigation of the magnetic and transport properties of the metallic frustrated magnet Pr2Ir2O7, observing a spontaneous Hall effect in the absence of uniform magnetization and at zero magnetic field. The data and analysis suggests that a chiral spin-liquid phase is induced by melting of a spin ice and the formation of chiral spin textures.

Date: 2010
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DOI: 10.1038/nature08680

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