Interplay of Correlations and Kohn Anomalies in Three Dimensions: Quantum Criticality with a Twist
| Autor: | Alessandro Toschi, Andrey A. Katanin, Karsten Held, Thomas Schäfer |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Quantum phase transition
Hubbard model PHASE TRANSITIONS QUANTUM CRITICALITY General Physics and Astronomy Electron CORRELATED ELECTRONS 01 natural sciences 010305 fluids & plasmas Quantum mechanics 0103 physical sciences QUANTUM PHASE TRANSITIONS Antiferromagnetism ARTICLE Twist 010306 general physics Quantum ANTIFERROMAGNETIC TRANSITION STRONGLY CORRELATED MATERIALS Physics Fermi surface ELECTRONIC CORRELATION MANY-BODY APPROACH QUANTUM CRITICAL BEHAVIOR QUANTUM THEORY Condensed Matter::Strongly Correlated Electrons Strongly correlated material |
| Zdroj: | Phys Rev Lett Physical Review Letters |
| ISSN: | 1079-7114 0031-9007 |
| Popis: | A general understanding of quantum phase transitions in strongly correlated materials is still lacking. By exploiting a cutting-edge quantum many-body approach, the dynamical vertex approximation, we make important progress, determining the quantum critical properties of the antiferromagnetic transition in the fundamental model for correlated electrons, the Hubbard model in three dimensions. In particular, we demonstrate that - in contradiction to the conventional Hertz-Millis-Moriya theory - its quantum critical behavior is driven by the Kohn anomalies of the Fermi surface, even when electronic correlations become strong. © 2017 American Physical Society. |
| Databáze: | OpenAIRE |
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