RT Journal Article
SR Electronic
T1 The Anomalous Hall Effect and Magnetic Monopoles in Momentum Space
JF Science
JO Science
FD American Association for the Advancement of Science
SP 92
OP 95
DO 10.1126/science.1089408
VO 302
IS 5642
A1 Fang, Zhong
A1 Nagaosa, Naoto
A1 Takahashi, Kei S.
A1 Asamitsu, Atsushi
A1 Mathieu, Roland
A1 Ogasawara, Takeshi
A1 Yamada, Hiroyuki
A1 Kawasaki, Masashi
A1 Tokura, Yoshinori
A1 Terakura, Kiyoyuki
YR 2003
UL http://science.sciencemag.org/content/302/5642/92.abstract
AB Efforts to find the magnetic monopole in real space have been made in cosmic rays and in particle accelerators, but there has not yet been any firm evidence for its existence because of its very heavy mass, ∼1016 giga–electron volts. We show that the magnetic monopole can appear in the crystal momentum space of solids in the accessible low-energy region (∼0.1 to 1 electron volts) in the context of the anomalous Hall effect. We report experimental results together with first-principles calculations on the ferromagnetic crystal SrRuO3 that provide evidence for the magnetic monopole in the crystal momentum space.