Fermi surface reconstruction by dynamic magnetic fluctuations and spin-charge separation near an O(3) quantum critical point

Holt, Michael, Oitmaa, Jaan, Chen, Wei and Sushkov, Oleg P. (2013) Fermi surface reconstruction by dynamic magnetic fluctuations and spin-charge separation near an O(3) quantum critical point. Physical Review B, 87 7: . doi:10.1103/PhysRevB.87.075109

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Author Holt, Michael
Oitmaa, Jaan
Chen, Wei
Sushkov, Oleg P.
Title Fermi surface reconstruction by dynamic magnetic fluctuations and spin-charge separation near an O(3) quantum critical point
Formatted title
Fermi surface reconstruction by dynamic magnetic fluctuations and spin-charge separation near an O(3) quantum critical point
Journal name Physical Review B   Check publisher's open access policy
ISSN 1098-0121
1550-235X
Publication date 2013-02-13
Year available 2013
Sub-type Article (original research)
DOI 10.1103/PhysRevB.87.075109
Open Access Status File (Publisher version)
Volume 87
Issue 7
Total pages 12
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Formatted abstract
Stimulated by the small/large Fermi surface controversy in the cuprates, we consider a small number of holes injected into the bilayer antiferromagnet. The system has an O(3) quantum critical point (QCP) separating the magnetically ordered and the magnetically disordered phases. We demonstrate that nearly critical quantum magnetic fluctuations can change the Fermi surface topology and also lead to spin charge separation (SCS) in two dimensions.We demonstrate that in the physically interesting regime there is a magnetically driven Lifshitz point (LP) inside the magnetically disordered phase. At the LP the topology of the hole Fermi surface is changed. The position of the LP,while being close to the position of the QCP, generally differs. Dependent on the additional hole hopping integrals t ' and t ", the LP can be located in the magnetically ordered phase and/or in the magnetically disordered phase. We also demonstrate that in this regime the hole spin and charge necessarily separate when approaching the QCP. The considered model sheds light on generic problems concerning the physics of the cuprates.
Keyword T-J model
High-temperature superconductors
Heisenberg antiferromagnet
Transition temperature
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article # 075109

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2014 Collection
 
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