Superconductivity above 150 K in HgBa2Ca2Cu3O8+δ at high pressures

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Abstract

RECENTLY, superconductivity at >130 K was reported1,2 in multiphase samples of the compound system HgBa2Can−1CunO2n+2+δ (Hg-12(n−l)n) with n = 1, 2, 3,.... Single-phase Hg-1223 was subsequently synthesized and found to be superconducting at a record temperature of 135 K (ref. 3). It remains to be seen if a much higher transition temperature (Tc) than 135K can be achieved in this compound system. The application of pressure generally increases the Tc of underdoped layered cuprates, with a pressure derivative of Tc that decreases with increasing doping4,5. Preliminary studies on Hg-12236 showed a pressure-induced increase in Tc without any sign of saturation up to 17 kbar. Here we report the observation of superconductivity at up to 153 K in Hg-1223 at 150 kbar, with a main transition at 147 K. This observation provides an indication that superconductivity at >150 K may be possible in this system at ambient pressure, if suitable forms of chemical substitution can be found.

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References

  1. 1

    Schilling, A., Cantoni, M., Guo, J. D. & Ott, H. R. Nature 363, 56–58 (1993).

  2. 2

    Gao, L. et al. Physica C213, 261–265 (1993).

  3. 3

    Huang, Z. J. et al. Physica C (in the press).

  4. 4

    Wijngaarden, R. J., Scholtz, J. J., van Eenige, E. N. & Griessen, R. in Frontiers of High Pressure Research (eds Hochheimer, H. D. & Etters, R. D.) 339–417 (Plenum, New York, 1991).

  5. 5

    Schilling, J. S. & Klotz, S. in Physical Properties of High Temperature Superconductors, Vol. 3 (ed. Ginzberg, D. M.) 59–157 (World Scientific, Singapore, 1992).

  6. 6

    Chu, C. W. J. Superconductivity (in the press).

  7. 7

    Meng, R. L. et al. Physica C (in the press).

  8. 8

    Chu, C. W. & Testardi, L. J. Phys. Rev. Lett. 32, 766–769 (1974).

  9. 9

    Eichler, A. & Wittig, J. Z. angew. Phys. 25, 319–327 (1968).

  10. 10

    Bireckoven, B. & Wittig, J. J. Phys. E21, 841–848 (1988).

  11. 11

    Neumeir, J. J. & Zimmermann, H. A. Phys. Rev. B47, 8386–8388 (1993).

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