Abstract
Apparently, a two-dimensional CuO lattice is formed on the surface of copper oxide in the CuO-Cu interface. This lattice consists of Cu2+ and O1− ions, which form a narrow, partially filled two-dimensional band. In this case, local electron pairs (LEPs) can form in the oxygen subsystem as a result of the fulfillment of the Shubin-Vonsovskii conditions. A crude estimate of the formation temperature of LEPs gives T* ∼ 10 4 K. At the concentration in the interface layer n∼1.6×1020 cm−3 and the effective mass of carriers m* ∼ m e, the onset temperature of Bose-Einstein condensation may take a value of T c ∼ 1000 K. The estimate obtained for the temperature T c corresponds to the experimental value by an order of magnitude.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
V. V. Osipov and A. A. Samokhvalov, Fiz. Met. Metalloved. 89, 43 (2000).
V. V. Osipov, I. V. Kochev, and S. V. Naumov, Zh. Éksp. Teor. Fiz. 120, 1246 (2001) [JETP 93, 1082 (2001)].
T. I. Arbuzova, S. V. Naumov, A. A. Samokhvalov, et al., Fiz. Tverd. Tela (St. Petersburg) 43, 846 (2001) [Phys. Solid State 43, 878 (2001)].
A. A. Samokhvalov, T. I. Arbuzova, N. A. Viglin, et al., Fiz. Tverd. Tela (St. Petersburg) 41, 293 (1999) [Phys. Solid State 41, 262 (1999)].
L. V. Gurvich, G. V. Karachevtsev, V. N. Kondrat'ev, Yu. A. Lebedev, V. A. Medvedev, V. K. Potapov, and Yu. S. Khodeev, Bond-Breaking Energies. Chemical. Ionization Potentials and Electron Affinity (Nauka, Moscow, 1974), p. 226.
S. P. Shubin and S. V. Vonsovskii, Proc. R. Soc. London 145, 159 (1934).
I. I. Amelin, Pis'ma Zh. Éksp. Teor. Fiz. 70, 24 (1999) [JETP Lett. 70, 23 (1999)].
I. I. Amelin, Zh. Fiz. Khim. 73, 2274 (1999).
I. I. Amelin, in Proceedings of the 32nd All-Russia Conference on Low Temperature Physics, Section “ Super-conductivity,” Kazan', 2000, p. 159.
V. B. Lazarev, V. V. Sobolev, and I. S. Shaplygin, Chemical and Physical Properties of Simple Oxides of Metals (Nauka, Moscow, 1983), p. 8.
K. Ohno, Adv. Quantum Chem. 3, 240 (1967).
V. I. Spitsin, G. V. Ionova, S. V. Vonsovskii, et al., Electron Dynamics and Charge-Ordered Crystals (Chernogolovka, 1985), p. 121.
C. Kittel, Introduction to Solid State Physics (Wiley, New York, 1976; Nauka, Moscow, 1978).
J. B. Goodenough, Metallic Oxides (Pergamon, New York, 1971), p. 145.
M. O'Keeffe and F. S. Stone, J. Phys. Chem. Solids 23(2), 261 (1962).
A. Alexandrov and J. Ranninger, Phys. Rev. B 24, 1164 (1981).
I. O. Kulik and A. G. Pedan, Zh. Éksp. Teor. Fiz. 79, 1469 (1980) [Sov. Phys. JETP 52, 742 (1980)].
I. O. Kulik and A. G. Pedan, Solid State Commun. 45, 971 (1983).
M. Schafroth, S. Butler, and J. Blatt, Helv. Phys. Acta 30, 93 (1957).
K. Kubo and S. Takada, J. Phys. Soc. Jpn. 52, 2108 (1983).
H. M. Plakida, High-Temperature Superconductors (Mezhdunarodnaya Programma Obrazovaniya, Moscow, 1996), p. 133.
V. L. Ginzburg, Usp. Fiz. Nauk 170, 619 (2000).
Author information
Authors and Affiliations
Additional information
__________
Translated from Pis'ma v Zhurnal Éksperimental'no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 76, No. 3, 2002, pp. 219–222.
Original Russian Text Copyright © 2002 by Amelin.