Quantum Phase Transition in the Itinerant Antiferromagnet (V0.9Ti0.1)2O3

Abstract

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 c_1 + c_2 T^{3/2}, where c_1 and c_2 are constants. This T^{3/2} 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.

4 pages, 4 figures

References in corpus (6)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• "Deconfined" quantum critical points
• Multiple energy scales at a quantum critical point
• Quasiparticle evolution and pseudogap formation in V2O3: An infrared spectroscopy study
• Quantum Critical Point of Itinerant Antiferromagnet in Heavy Fermion
• Spin Fluctuation in Heavy Fermion CeRu_2Si_2