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Ovchinnikov, S. G.
From underdoped to overdoped cuprates: two quantum phase transitions / S. G. Ovchinnikov, E. I. Shneyder, M. M. Korshunov // J. Phys.: Condens. Matter. - 2011. - Vol. 23, Is. 4. - Ст. 45701, DOI 10.1088/0953-8984/23/4/045701. - Cited References: 58. - We would like to thank S Sakai for useful discussions. The authors acknowledge support by the Russian Foundation for Basic Research (grant N 09-02-00127), by the Integration Program of SBRAS N40, the Presidium RAS Program 5.7, President of Russia (grant MK-1683.2010.2), FCP Scientific and Research-and-Educational Personnel of Innovative Russia for 2009-2013 (GK P891), and in part by the National Science Foundation under grant NSF PHY05-51164. . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTORS
   T-J MODEL
   CORRELATED FERMION SYSTEMS
   VALENCE BOND STATE
   MEAN-FIELD-THEORY
   CRITICAL-POINT
   HEISENBERG-ANTIFERROMAGNET
   EXCITATIONS
   PSEUDOGAP
   OSCILLATIONS
Кл.слова (ненормированные):
Critical concentration -- Critical points -- Cuprates -- Density of state -- Fermi surface topology -- Hall effect measurement -- High-T -- Optimal doping -- Overdoped -- Pseudo-gap -- Quantum phase transitions -- Theoretical study -- Copper compounds -- Hall effect -- Magnetic field effects -- Phase diagrams -- Phase transitions
Аннотация: Several experimental and theoretical studies indicate the existence of a critical point separating the underdoped and overdoped regions of the high-T-c cuprates' phase diagram. There are at least two distinct proposals on the critical concentration and its physical origin. The first one is associated with the pseudogap formation for p < p*, with p* approximate to 0.2. The other relies on the Hall effect measurements and suggests that the critical point and the quantum phase transition (QPT) take place at optimal doping, p(opt) approximate to 0.16. Here we have performed a precise density of states calculation and found that there are two QPTs and the corresponding critical concentrations associated with the change of the Fermi surface topology upon doping.

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Держатели документа:
[Ovchinnikov, S. G.
Shneyder, E. I.
Korshunov, M. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Shneyder, E. I.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
[Korshunov, M. M.] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
ИФ СО РАН
L V Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation
Department of Physics, University of Florida, Gainesville, FL 32611, United States

Доп.точки доступа:
Shneyder, E. I.; Шнейдер, Елена Игоревна; Korshunov, M. M.; Коршунов, Максим Михайлович; Овчинников, Сергей Геннадьевич
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Ivantsov, I.
Fermi surface reconstruction in underdoped cuprates: Origin of electron pockets / I. Ivantsov, A. Ferraz, E. Kochetov // Phys. Rev. B. - 2018. - Vol. 98, Is. 21. - Ст. 214511, DOI 10.1103/PhysRevB.98.214511. - Cited References: 61 . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Materials Science, Multidisciplinary + Physics, Applied + Physics, Condensed Matter
Рубрики:
QUANTUM OSCILLATIONS
   PSEUDOGAP STATE
   CRITICAL-POINT
   CHARGE ORDER
Аннотация: A new phenomenological model is proposed to describe the evolution of the Fermi surface (FS) in a wide range of dopings. It reproduces the key features of the cuprates in the underdoped phase above the superconducting temperature Tc. It is shown that the explicit accounting of strong electron correlation in the framework of the t−J model taken in complementary to the translational symmetry breaking induced by the charge density wave (CDW) gives rise to the Fermi surface reconstruction (FSR) into small electron pockets. While the strong Coulomb repulsion leads to an emergence of the arclike Fermi surface in the pseudogap (PG) phase, the Bragg reflection on the boundaries of the reduced Brillouin zone (BZ) opens up a possibility to close the quasiparticle orbits. Direct calculation of the FS properties allows us to unveil the scenario of the experimentally observed transition to the CDW phase that sets in at the doping level δ≈0.08 and is accompanied by a divergence of the carriers effective mass and the sign reversals of the Hall and Seebeck coefficients.

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Держатели документа:
Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia.
Russian Acad Sci, Siberian Branch, LV Kyrensky Inst Phys, Krasnoyarsk 660036, Russia.
Univ Fed Rio Grande do Norte, Dept Expt & Theoret Phys, Int Inst Phys, BR-59078970 Natal, RN, Brazil.

Доп.точки доступа:
Ferraz, Alvaro; Kochetov, Evgenii; Иванцов, Илья Дмитриевич
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