Low Temperature Physics: 32, 802 (2006); https://doi.org/10.1063/1.2219501 (7 pages)
Физика Низких Температур: Том 32, Выпуск 8-9 (Август 2006), c. 1055-1064    ( к оглавлению , назад )

Temperature-carrier-concentration phase diagram of a two-dimensional doped d-wave superconductor

V.M. Loktev

Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine 14-b, Metrologicheskaya Str. Kiev, 03143, Ukraine
E-mail: vloktev@bitp.kiev.ua

V.M. Turkowski

Department of Physics, Georgetown University, Washington, D.C. 20057, USA
E-mail: turk@physics.georgetown.edu

Received March 1, 2006


The finite-temperature properties of a two-dimensional d-wave superconductor with the Lifshitz disorder, introduced by dopants, are studied. The doping dependence of the mean-field critical temperature TcMF and of the superconducting critical temperature Tc defined by the Berezinskii-Kosterlitz-Thouless transition are calculated at different values of coupling, dopant potential, and intermediate boson energy. It is shown that superconductivity tends to disappear with increasing doping when the dopant potential is large enough, though the metallic properties of the system are preserved.

74.20.Rp - Pairing symmetries (other than s-wave)
74.25.Dw - Superconductivity phase diagrams
74.40.+k - Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.)
74.62.Dh - Effects of crystal defects, doping and substitution
74.72.-h - Cuprate superconductors (high-Tc and insulating parent compounds)

Ключевые слова: two-dimensional d-wave superconductor.