Abstract
The phase transition “triangular lattice-vortex liquid” in layered high-T c superconductors in the presence of pinning centers is studied. A two-dimensional system of vortices simulating the superconducting layers in a high-T c Shubnikov phase is calculated by the Monte Carlo method. It was found that in the presence of defects the melting of the vortex lattice proceeds in two stages: First, the ideal triangular lattice transforms at low temperature (≃3 K)into islands which are pinned to the pinning centers and rotate around them and then, at a higher temperature (≃8 K for T c 584 K), the boundaries of the “islands” become smeared and the system transforms into a vortex liquid. As the pinning force increases, the temperatures of both phase transitions shift: The temperature of the point “triangular lattice-rotating lattice” decreases slightly (to ≃2 K)and the temperature of the phase transition “rotating lattice-vortex liquid” increases substantially (≃70 K).
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References
G. Blatter, M. V. Feigel’man, V. B. Geshkenbein et al., Rev. Mod. Phys. 66, 1125 (1994).
C. Reichardt, J. Groth, C. J. Olson et al., Phys. Rev. B 54, 16108 (1996).
D. Ertas and D. R. Nelson, Physica C 272, 79 (1996).
S. Ruy, M. Hellerquist, S. Doniach et al., Phys. Rev. Lett. 77, 5114 (1996).
R. E. Hetzel, A. Sudbo, and D. A. Huse, Phys. Rev. Lett. 69, 518 (1992).
K. Yates, D. J. Newman, and P. A. J. de Groot, Phys. Rev. B 52, R13149 (1995).
R. Sasik and D. Stroud, Phys. Rev. B 52, 3696 (1995).
I. A. Rudnev, V. A. Kashurnikov, and M. A. Katargin, Proceedings of the 8th Workshop on Critical Current in Superconductors, Japan, May 27–29, 1996, Report P1-15; M. E. Gracheva, M. A. Katargin, V. A. Kashurnikov, and I. A. Rudnev, Fiz. Tverd. Tela (St. Petersburg) 23, No. 11 (1997) [Phys. Solid State], in press.
Yu. E. Lozovik and E. A. Rakoch, JETP Lett. 65, 282 (1997).
S. Ruy, S. Doniach, G. Deutscher, and A. Kapitulnik, Phys. Rev. Lett. 68, 710 (1992).
E. Zeldov, D. Majer, M. Konczykovski et al., Nature 375, 373 (1995).
A. I. Larkin and Yu. N. Ovchinnikov, J. Low Temp. Phys. 34, 409 (1979).
A. V. Nikulov, D. Yu. Remisov and V. A. Oboznov, Phys. Rev. Lett. 75, 2586 (1995).
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Pis’ma Zh. Éksp. Teor. Fiz. 66, No. 4, 269–274 (25 August 1997)
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Gracheva, M.E., Kashurnikov, V.A. & Rudnev, I.A. Features of the melting dynamics of a vortex lattice in a high-T c superconductor in the presence of pinning centers. Jetp Lett. 66, 291–297 (1997). https://doi.org/10.1134/1.567470
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DOI: https://doi.org/10.1134/1.567470