Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2012-04-09
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
The ground state of the quantum spin system kappa-(BEDT-TTF)2Cu2(CN)3 in which antiferromagnetically-interacting S=1/2 spins are located on a nearly equilateral triangular lattice attracts considerable interest both from experimental and theoretical aspects, because a simple antiferromagnetic order may be inhibited because of the geometrical frustration and hence an exotic ground state is expected. Furthermore, recent two reports on the ground state of this system have made it further intriguing by showing completely controversial results; one indicates the gapless state and the other gapped. By utilizing microscopic probe of muSR, we have investigated its spin dynamics below 0.1 K, unveiling its microscopically phase separated ground state at zero field.
Goto Takayuki
Ishii Yasuyuki
Kobayashi Norio
Nakajima Saori
Ohishi Kazuki
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