"Weyl fermions are most notable for behaving like a composite of monopole- and antimonopole-like particles when inside a crystal, Hasan said. This means that Weyl particles that have opposite magnetic-like charges can nonetheless move independently of one another with a high degree of mobility."[/font][/size]
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http://revolution-green.com/a-massless-particle-is-discovered-with-interesting-magnetic-properties/