Abstract
We have studies optical and transport properties of the prototypical high-Tc system La2−xSrxCuO4 in the direction perpendicular to the CuO2 planes (c-axis direction). In the normal state, it is found that the c-axis spectral weight is suppressed over a wide energy range. This is a demonstration of “charge confinement” in the real material which has been proposed theoretically by Anderson. Upon reducing temperature the low-energy spectral weight of the underdoped compound is further reduced, due perhaps to “spin gap” effect. The suppressed spectral weight results in completely different out-of-plane charge transport in the normal state and leads to the appearance of a superconducting plasma edge within the gap region in the superconducting state.
Similar content being viewed by others
References
For a review, see W. E. Pickett,Rev. Mod. Phys. 61, 433 (1989).
P. W. Anderson,Physica C 185–189, 11 (1991).
T. Itoet al., Nature (London) 350, 596 (1991).
Y. Nakamura and S. Uchida,Phys. Rev. B 47, 8369 (1993).
K. Tamasaku, Y. Nakamura and S. Uchida,Phys. Rev. Lett. 69, 1455 (1992).
K. Tamasakuet al., in preparation.
S. Tajimaet al., J. Opt. Soc. Am. B 6, 475 (1989).
S. Uchidaet al., Phys. Rev. B 43, 7942 (1991).
P. W. Anderson,Science 256, 1526 (1992).
P. B. Allen, W. E. Pickett and H. Krakauer,Phys. Rev. B 36, 3926 (1987).
C. T. Chenet al., Phys. Rev. Lett. 68, 2543 (1992).
E. Pellegrinet al., Phys. Rev. B 47, 3354 (1993).
C. T. Chenet al., Phys. Rev. Lett. 66, 104 (1991).
S. L. Cooperet al., Phys. Rev. B 47, 8233 (1993).
S. Uchida,Physica C 185–189, 28 (1991).
C. C. Homeset al., Phys. Rev. Lett. 71, 1645 (1993).
P. W. Anderson and Z. Zou,Phys. Rev. Lett. 60, 132 (1988).
N. Nagaosa,J. Chem. Phys. Solids 53, 1493 (1992).
See for instance, H. Yasuoka, T. Imai and T. Shimizu, inStrong Correlation and Superconductivity, edited by H. Fukuyama, S. Maekawa and A. P. Malozemoff (Springer, Berlin 1989) p. 254.
J. Rossat-Mignodet al., Physica B 180&181, 383 (1992).
T. Itoet al., Physica C185–189, 1267 (1991); T. Ito, K. Takenaka and S. Uchida,Phys. Rev. Lett. 70, 3995 (1993).
S.-W. Cheonget al., Phys. Rev. Lett. 67, 1791 (1991).
P. W. Anderson, inStrong Correlation and Superconductivity, edited by H. Fukuyama, S. Maekawa and A. P. Malozemoff (Springer, Berlin 1989) p. 2.
N. Nagaosa, in preparation.
N. Nagaosa and P. A. Lee,Phys. Rev. B 45, 966 (1992).
Y. J. Uemuraet al., Phys. Rev. Lett. 62, 2317 (1989).
J. R. Clem,Physica C162–164, 1137 (1989).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Uchida, S., Tamasaku, K., Takenaka, K. et al. Interplane charge dynamics in high-temperature superconductors; Charge confinement and spin gap. J Low Temp Phys 95, 109–121 (1994). https://doi.org/10.1007/BF00754928
Issue Date:
DOI: https://doi.org/10.1007/BF00754928