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Makarov, I. A.
Effect of Interlayer Single-Particle Hoppings on the Superconducting Transition Temperature / I. A. Makarov, S. G. Ovchinnikov // JETP Letters. - 2011. - Vol. 93, Is. 6. - P. 339-343, DOI 10.1134/S0021364011060063. - Cited References: 27. - This work was supported by the Presidium of the Russian Academy of Sciences (program no. 18.7 "Quantum Physics of Condensed Matter"), by the Siberian and Ural Branches of the Russian Academy of Sciences (joint project no. 40), by the Russian Foundation for Basic Research (project no. 09-02-00127), by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project no. MK-1683.2010.2), and by the Ministry of Education and Science of the Russian Federation (project no. GK P891, federal program "Scientific and Pedagogical Personnel of Innovative Russia"). . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
T-J MODEL
   DEPENDENCE
   YBA2CU3O7-DELTA
   ELECTRON
   SPECTRUM
   STRESS
Аннотация: It is well known that the superconducting transition temperature of high-T-c cuprates depends on the number of CuO2 planes in the unit cell. The multilayer structure implies the possibility of interlayer hopping. Under the assumption that the interlayer hopping can be specified by the parameter t(perpendicular to)(k) = t(perpendicular to)(cos(k(x)) - cos(k(y)))(2), the quasiparticle excitation spectrum for the bilayer cuprate in the superconducting state has been determined in the framework of the t - t' - t '' - t(perpendicular to) - J* model using the generalized mean-field approximation. It turns out that the interlayer hoppings does not create any additional mechanism of the Cooper paring and does not lead to an increase in T-c. The splitting of the upper Hubbard quasiparticle band attributed to the interlayer hoppings is manifested as two peaks in the doping dependence of the superconducting transition temperature at temperatures below the maximum T-c value for a single-layer cuprate. It has been found that antiferromagnetic interlayer correlations suppress the interlayer splitting. This probably leads to the common doping dependence of T-c for both single-layer and bilayer cuprates.

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Держатели документа:
[Makarov, I. A.
Ovchinnikov, S. G.] Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
[Ovchinnikov, S. G.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Макаров, Илья Анатольевич
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