Quantum phase transition in the itinerant antiferromagnet (V0.9Ti0.1)2O3

Journal Article · Tue Jan 01 04:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.101.096406· OSTI ID:938757

Kadowaki, Hiroaki ^[1]; Motoya, Kiyoichiro ^[2]; Sato, Taku ^[1]; Lynn, J. W. ^[3]; Fernandez-Baca, Jaime A ^[1]; Kikuchi, Jun ^[4]

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1. ORNL
2. Tokyo University of Science, Japan
3. National Institute of Standards and Technology (NIST)
4. Meiji University, Kawasaki

Quantum critical behavior of the itinerant electron antiferromagnet (V0.9Ti0.1)2O3 has been studied by single-crystalline 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. PACS numbers: 71.27.+a,71.10.Hf,75.40.-s,75.40.Gb

• Research Organization: Oak Ridge National Laboratory (ORNL); High Flux Isotope Reactor
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 938757
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CRITICALITY
DIMENSIONS
ELECTRONS
FLUCTUATIONS
NEUTRONS
SCATTERING
SPIN