Abstract
AbstractThe band structure of cuprates as a doped 2D insulator is modeled assuming that the excess charge carriers are associated with the corresponding substitution atoms, and the phase diagram of the paramagnetic states as a function of the degree x of doping at zero temperature is studied. The Hamiltonian contains electronic correlations on impurity orbitals and hybridization between them and the initial band states of the insulator. It is shown that the change in the electronic structure of a doped compound includes the formation of impurity bands of distributed and localized electronic states in the initial insulator gap. It is established that in the case of one excess electron per substitution atom the spin fluctuations (1) give rise to an insulator state of the doped compound for x < x thr, 1, (2) lead to a superconducting state for x thr, 1 < x < x thr, 2, and (3) decay as x > x thr, 2 increases further, and the doped compound transforms into a paramagnetic state of a “poor” metal with a high density of localized electronic states at the Fermi level.
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References
G. M. Éliashberg, in Physical Properties of High-Temperature Superconductors, Ed. by D. M. Ginzberg (Mir, Moscow, 1990), p. 505.
E. Dagotto, Rev. Mod. Phys. 66, 673 (1994).
N. Bulut and D. J. Scalapino, Phys. Rev. B 50, 16078 (1994).
Q. Chen, I. Kosztin, B. Jankó, et al., Phys. Rev. Lett. 81, 4708 (1998).
Yu. A. Uzyumov, Usp. Fiz. Nauk 161, 2 (1991) [Sov. Phys. Usp. 34, 361 (1991)]; Usp. Fiz. Nauk 165, 403 (1995) [Sov. Phys. Usp. 38, 385 (1995)].
N. M. Plakida, High T c Superconductivity (Springer, Berlin, 1995).
P. Monthoux and D. Pines, Phys. Rev. B 49, 4261 (1994).
A. Chubukov and D. K. Morr, Phys. Rev. Lett. 81, 4716 (1998).
T. J. Smith, K. H. Andersen, U. Beck, et al., J. Magn. Magn. Mater. 177–181, 543 (1998).
H. A. Blackstead, J. D. Dow, and D. B. Pulling, Physica C 265, 143 (1996).
M. Sigrist and T. M. Rice, Rev. Mod. Phys. 64, 503 (1995).
D. J. Scalapino and S. R. White, Phys. Rev. B 58, 8222 (1998).
V. J. Emery and S. A. Kivelson, Phys. Rev. Lett. 74, 3253 (1995).
Q. Si, J. Phys. Cond. Matt. 8, 9953 (1996).
A. S. Alexandrov, Physica C 274, 237 (1997).
M. V. Sadovskii, Sverkhprovodimost’: Fiz., Khim., Tekh. 3, 337 (1995).
P. P. Edwards, N. F. Mott, and A. S. Alexandrov, J. Supercond. 11, 151 (1998).
H. A. Blackstead, J. D. Dow, and D. B. Pulling, Physica C 265, 143 (1996).
A. I. Agafonov and É. A. Manykin, Pis’ma Zh. Éksp. Teor. Fiz. 65, 419 (1997) [JETP Lett. 65, 439 (1997)].
M. I. Ivanov, V. M. Loktev, and Yu. G. Pogorelov, Fiz. Nizk. Temp. 24, 615 (1998) [Low Temp. Phys. 24, 463 (1998)].
N. F. Mott, Metal-Insulator Transition (Taylor and Francis, London, 1990).
P. P. Edwards, T. V. Ramakrishnan, and C. N. R. Rao, J. Phys. Chem. 99, 5228 (1995).
C. Y. Chen, R. J. Birgeneau, M. A. Kastner, et al., Phys. Rev. B 43, 392 (1991).
G. A. Thomas, in High Temperature Superconductivity, Ed. by D. P. Tunstall and W. Barford (Adam Hilger, Bristol, 1991), p. 169.
Z.-X. Shen and D. S. Dessau, Phys. Rep. 253, 1 (1995).
C. Quitmann, J. Ma, R. J. Kelly, et al., Physica C 235–240, 1019 (1994).
A. I. Agafonov and E. A. Manykin, Physica B 259–261, 458 (1999).
T. Timusk, S. L. Herr, K. Kamaras, et al., Phys. Rev. B 38, 6683 (1988).
F. D. M. Haldane and P. W Anderson, Phys. Rev. B 13, 2553 (1976).
A. I. Agafonov and E. A. Manykin, Phys. Rev. B 52, 14571 (1995); A. I. Agafonov and É. A. Manykin, Zh. Éksp. Teor. Fiz. 109, 1405 (1996) [JETP 82, 758 (1996)].
A. A. Abrikosov, L. P. Gor’kov, and I. E. Dzyaloshinskii, Methods of Quantum Field Theory in Statistical Physics (Fizmatgiz, Moscow, 1962; Prentice-Hall, Englewood Cliffs, New Jersey, 1963).
A. I. Agafonov and É. A. Manykin, Zh. Éksp. Teor. Fiz. 114, 1765 (1998) [JETP 87, 956 (1998)].
F. Yonezawa and T. Matsubara, Prog. Theor. Phys. 35, 357 (1966).
S. W. Robey, L. T. Hudson, C. Eylem, et al., Phys. Rev.B 48, 562 (1993).
T. Katsufuji, Y. Okimoto, and Y. Tokura, Phys. Rev. Lett. 75, 3497 (1995); M. Kasuya, Y. Tokura, T. Arima, et al., Phys. Rev. B 47, 6197 (1993); Y. Taguchi, Y. Tokura, T. Arima, et al., Phys. Rev. B 48, 511 (1993).
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Translated from Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 117, No. 1, 2000, pp. 182–195.
Original Russian Text Copyright © 2000 by Agafonov, Manykin.
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Agafonov, A.I., Manykin, É.A. Insulator-superconductor-metal transitions induced by spin fluctuations in the paramagnetic phase of doped insulators. J. Exp. Theor. Phys. 90, 160–172 (2000). https://doi.org/10.1134/1.559087
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DOI: https://doi.org/10.1134/1.559087