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Could use a break

Electric fields can controllably break the inversion symmetry of bilayer graphene, which can be harnessed to generate pure valley currents.

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Figure 1: Valley Hall effect.


  1. 1

    Xiao, D., Chang, M.-C. & Niu, Q. Rev. Mod. Phys. 82, 1959 (2010).

    ADS  Article  Google Scholar 

  2. 2

    Sui, M. et al. Nature Phys. 11, 1027–1031 (2015).

    ADS  Article  Google Scholar 

  3. 3

    Shimazaki, Y. et al. Nature Phys. 11, 1032–1036 (2015).

    ADS  Article  Google Scholar 

  4. 4

    Xiao, D., Yao, W. & Niu, Q. Phys. Rev. Lett. 99, 236809 (2007).

    ADS  Article  Google Scholar 

  5. 5

    Datta, S. & Das, B. Appl. Phys. Lett. 56, 665 (1990).

    ADS  Article  Google Scholar 

  6. 6

    Mak, K. F., McGill, K. L., Park, J. & McEuen, P. Science 344, 1489–1492 (2014).

    ADS  Article  Google Scholar 

  7. 7

    Zhang, Y., Tan, Y.-W., Stormer, H. L. & Kim, P. Nature 438, 201–204 (2005).

    ADS  Article  Google Scholar 

  8. 8

    Song, J. C. W., Samutpraphoot, P. & Levitov, L. S. Proc. Natl Acad. Sci. USA 112, 10879–10883 (2015).

    ADS  MathSciNet  Article  Google Scholar 

  9. 9

    Gorbachev, R. V. et al. Science 346, 448–451 (2014).

    ADS  Article  Google Scholar 

  10. 10

    Abanin, D. A., Shytov, A. V., Levitov, L. S. & Halperin, B. I. Phys. Rev. B 79, 035304 (2009).

    ADS  Article  Google Scholar 

  11. 11

    Castro, E. V. et al. Phys. Rev. Lett. 99, 216802 (2007).

    ADS  Article  Google Scholar 

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Correspondence to François Amet or Gleb Finkelstein.

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Amet, F., Finkelstein, G. Could use a break. Nature Phys 11, 989–990 (2015).

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