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Shear Modulus and Dislocations in bcc Solid \(^3\)He

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Abstract

The shear modulus of hcp \(^4\)He decreases significantly above \(\sim \)200 mK, as \(^3\)He impurities unbind from dislocations, unpinning them, and softening the crystal. Here we report shear modulus measurements on a fermi quantum solid: bcc \(^3\)He. In contrast to previous low-frequency measurements, which did not show dislocation softening in this system, we have observed a drop in shear modulus, accompanied by a dissipation peak, which we attribute to the unpinning of dislocations as \(^4\)He impurities unbind. For large stresses, impurities cannot pin the dislocations and the low temperature stiffening is suppressed. At high frequencies, the modulus changes and dissipation peaks shift to higher temperature, indicating that the unbinding is thermally activated. For a 58 bar bcc \(^3\)He crystal, we find an activation energy of 0.27 K, smaller than the 0.7 K binding energy for \(^3\)He impurities in hcp \(^4\)He.

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References

  1. J. Day, J.R. Beamish, Nature 450, 853 (2007)

    Article  ADS  Google Scholar 

  2. A. Haziot, X. Rojas, A.D. Fefferman, J.R. Beamish, S. Balibar, Phys. Rev. Lett. 110, 035301 (2013)

    Article  ADS  Google Scholar 

  3. J.T. West, O. Syshchenko, J. Beamish, M.H.W. Chan, Nat. Phys. 5, 598 (2009)

    Article  Google Scholar 

  4. J.R. Beamish, J.P. Franck, Phys. Rev. B 26, 6104 (1982)

    Article  ADS  Google Scholar 

  5. I. Iwasa, N. Saito, H. Suzuki, J. Phys. Soc. Jpn. 52, 952 (1983)

    Article  ADS  Google Scholar 

  6. Y. Miura, K. Mori, T. Mamiya, Physica B 284, 357 (2000)

    Article  ADS  Google Scholar 

  7. O. Syshchenko, J. Day, J. Beamish, Phys. Rev. Lett. 104, 195301 (2010)

    Article  ADS  Google Scholar 

  8. A. Haziot, A.D. Fefferman, F. Souris, J.R. Beamish, H.J. Maris, S. Balibar, Phys. Rev. B 88, 014106 (2013)

    Article  ADS  Google Scholar 

  9. L. Pollet, M. Boninsegni, A.B. Kuklov, N.V. Prokof’ev, B.V. Svistunov, M. Troyer, Phys. Rev. Lett. 101, 097202 (2008)

    Article  ADS  Google Scholar 

  10. de Koning M., Landinez Borda E.J., Cai W.: In APS Meeting Abstracts, p. 22005 (2015)

  11. E.S.H. Kang, D.Y. Kim, H.C. Kim, E. Kim, Phys. Rev. B 87, 094512 (2013)

    Article  ADS  Google Scholar 

  12. O. Syshchenko, J. Beamish, J. Phys. 150, 032100 (2009)

    Google Scholar 

Download references

Acknowledgments

We would like to thank Izumi Iwasa and Maurice de Koning for valuable discussions. This work was supported by a grant from NSERC Canada.

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Authors and Affiliations

  1. Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2E1, Canada

    Zhi Gang Cheng, Fabien Souris & John Beamish

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  1. Zhi Gang Cheng
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  2. Fabien Souris
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  3. John Beamish
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Correspondence to Zhi Gang Cheng.

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Cheng, Z.G., Souris, F. & Beamish, J. Shear Modulus and Dislocations in bcc Solid \(^3\)He. J Low Temp Phys 183, 99–105 (2016). https://doi.org/10.1007/s10909-015-1374-y

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  • DOI: https://doi.org/10.1007/s10909-015-1374-y

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