Superconductivity in compressed lithium at 20 K


Superconductivity at high temperatures is expected in elements with low atomic numbers, based in part on conventional BCS (Bardeen–Cooper–Schrieffer) theory1. For example, it has been predicted that when hydrogen is compressed to its dense metallic phase (at pressures exceeding 400 GPa), it will become superconducting with a transition temperature above room temperature2. Such pressures are difficult to produce in a laboratory setting, so the predictions are not easily confirmed. Under normal conditions lithium is the lightest metal of all the elements, and may become superconducting at lower pressures3,4; a tentative observation of a superconducting transition in Li has been previously reported5. Here we show that Li becomes superconducting at pressures greater than 30 GPa, with a pressure-dependent transition temperature (Tc) of 20 K at 48 GPa. This is the highest observed Tc of any element; it confirms the expectation that elements with low atomic numbers will have high transition temperatures, and suggests that metallic hydrogen will have a very high Tc. Our results confirm that the earlier tentative claim5 of superconductivity in Li was correct.

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Figure 1: Arrangement of sample and electrodes on the diamond anvils.
Figure 2: Temperature dependence of the electrical resistance of lithium measured at temperatures below 50 K.
Figure 3: The effect of magnetic fields on the behaviour of the resistance drop in run no. 3.
Figure 4: Pressure dependence of the superconducting onset temperature, Tc onset, for Li.


  1. 1

    Bardeen, J., Cooper, L. N. & Schrieffer, J. R. Theory of superconductivity. Phys. Rev. 108, 1175–1204 (1957)

    ADS  MathSciNet  CAS  Article  Google Scholar 

  2. 2

    Richardson, C. F. & Ashcroft, N. W. High temperature superconductivity in metallic hydrogen: Electron-electron enhancements. Phys. Rev. Lett. 78, 118–121 (1997)

    ADS  CAS  Article  Google Scholar 

  3. 3

    Allen, P. B. & Cohen, M. L. Pseudopotential calculation of the mass enhancement and superconducting transition temperature of simple metals. Phys. Rev. 187, 525–538 (1969)

    ADS  CAS  Article  Google Scholar 

  4. 4

    Richardson, C. F. & Ashcroft, N. W. Effective electron-electron interactions and the theory of superconductivity. Phys. Rev. B 55, 15130–15145 (1997)

    ADS  CAS  Article  Google Scholar 

  5. 5

    Lin, T. H. & Dunn, K. J. High-pressure and low-temperature study of electrical resistance of lithium. Phys. Rev. B 33, 807–811 (1986)

    ADS  CAS  Article  Google Scholar 

  6. 6

    Neaton, J. B. & Ashcroft, N. W. Pairing in dense lithium. Nature 400, 141–144 (1999)

    ADS  CAS  Article  Google Scholar 

  7. 7

    Hanfland, M., Syassen, K., Christensen, N. E. & Novikov, D. L. New high-pressure phase of lithium. Nature 408, 174–178 (2000)

    ADS  CAS  Article  Google Scholar 

  8. 8

    Christensen, N. E. & Novikov, D. L. Predicted superconductive properties of lithium under pressure. Phys. Rev. Lett. 86, 1861–1864 (2001)

    ADS  CAS  Article  Google Scholar 

  9. 9

    Hanfland, M., Loa, I., Syassen, K., Schwarz, U. & Takemura, K. Equation of state of lithium to 21 GPa. Solid State Commun. 112, 123–127 (1999)

    ADS  CAS  Article  Google Scholar 

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We thank H. Goto for technical support in machining the pit-anvils. This work was supported by a Grant-in-Aid for COE (Center of Excellence) Research and Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan.

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Correspondence to Katsuya Shimizu.

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Shimizu, K., Ishikawa, H., Takao, D. et al. Superconductivity in compressed lithium at 20 K. Nature 419, 597–599 (2002).

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