Quantum phase transition in the itinerant antiferromagnet (V0.9Ti0.1)2O3.
Quantum-critical behavior of the itinerant electron antiferromagnet (V0.9Ti0.1)2O3 has been studied by single-crystal neutron scattering. By directly observing antiferromagnetic spin fluctuations in the paramagnetic phase, we have shown that the characteristic energy depends on temperature as c1 +c2T3/2, where c1 and c2 are constants. This T3/2 dependence demonstrates that the present strongly correlated d-electron antiferromagnet clearly shows the criticality of the spin-density-wave quantum phase transition in three space dimensions.
Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan. kadowaki@comp.metro-u.ac.jp
Hiroaki
H
Kadowaki
Kiyoichiro
K
Motoya
Taku J
TJ
Sato
J W
JW
Lynn
J A
JA
Fernandez-Baca
Jun
J
Kikuchi