Quantum critical local spin dynamics near the Mott metal-insulator transition in infinite dimensions

Dasari, Nagamalleswararao, Vidhyadhiraja, N. S., Jarrell, Mark and McKenzie, Ross H. (2017) Quantum critical local spin dynamics near the Mott metal-insulator transition in infinite dimensions. Physical Review B, 95 16: . doi:10.1103/PhysRevB.95.165105


Author Dasari, Nagamalleswararao
Vidhyadhiraja, N. S.
Jarrell, Mark
McKenzie, Ross H.
Title Quantum critical local spin dynamics near the Mott metal-insulator transition in infinite dimensions
Journal name Physical Review B   Check publisher's open access policy
ISSN 1550-235X
2469-9969
2469-9950
Publication date 2017-04-05
Sub-type Article (original research)
DOI 10.1103/PhysRevB.95.165105
Open Access Status Not yet assessed
Volume 95
Issue 16
Total pages 8
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Formatted abstract
Finding microscopic models for metallic states that exhibit quantum critical properties is a major theoretical challenge. We calculate the dynamical local spin susceptibility χ(T,ω) for a Hubbard model at half-filling using dynamical mean-field theory, which is exact in infinite dimensions. Qualitatively distinct behavior is found in the different regions of the phase diagram: Mott insulator, Fermi liquid metal, bad metal, and a quantum critical region above the finite-temperature critical point. The signature of the latter is ω/T scaling, where ω is the frequency and T is the temperature. Our results are consistent with previous results showing scaling of the dc electrical conductivity, and they are relevant to experiments on organic charge-transfer salts.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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