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When an exciton acts like a hole

( —When is an electron hole like a quasiparticle (QP)? More specifically, what happens when a single electron hole is doped into a two-dimensional quantum antiferromagnet? Quasiparticle phenomena ...

13 hours ago 4.5 / 5 (2) 0

Evidence for supernovas near Earth

Once every 50 years, more or less, a massive star explodes somewhere in the Milky Way. The resulting blast is terrifyingly powerful, pumping out more energy in a split second than the sun emits in a million ...

12 hours ago 4.7 / 5 (18) 4

The roots of human altruism

Scientists have long been searching for the factor that determines why humans often behave so selflessly. It was known that humans share this tendency with species of small Latin American primates of the ...

8 hours ago 4.3 / 5 (7) 0