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Energy gap in tunneling spectroscopy: Effect of the chemical potential shift

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Abstract

We study the effect of a shift of the chemical potential level on the tunneling conductance spectra. In the systems with gapped energy spectra, significant chemical-potential dependent distortions of the differential tunneling conductance curves, dI/dV, arise in the gap region. An expression is derived for the correction of dI/dV, which in a number of cases is found to be large. The sign of the correction depends on the chemical potential level position with respect to the gap. The correction of associated with the dI/dV chemical potential shift has a nearly linear dependence on the tip-sample separation z and vanishes at z → 0.

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References

  1. I. Barke, R. Bennewitz, J. N. Crain, S. C. Erwin, A. Kirakosian, J. L. McChesney, and F. J. Himpsel, Solid State Commun. 142, 617 (2007).

    Article  ADS  Google Scholar 

  2. I. Matsuda and Sh. Hasegawa, J. Phys.: Condens. Matter 19, 355007 (2007).

    Google Scholar 

  3. H. Liu, H. Zheng, F. Yang, L. Jiao, J. Chen, W. Ho, Ch. Gao, J. Jia, and M. Xie, ACS Nano 9, 6619 (2015).

    Article  Google Scholar 

  4. T. Zhang, P. Cheng, W.-J. Li, Y.-J. Sun, G. Wang, X.-G. Zhu, K. He, L. Wang, X. Ma, X. Chen, Y. Wang, Y. Liu, H.-Q. Lin, J.-F. Jia, and Q.-K. Xue, Nat. Phys. 6, 104 (2010).

    Article  Google Scholar 

  5. Contemporary Concepts of Condensed Matter Science, Ed. by E. Burstein, A. H. Macdonald, and P. J. Stiles, Vol. 6: Topological Insulators, Ed. by M. Franz and L. Molenkamp (Elsevier, Oxford, 2013).

  6. R. M. Feenstra, Surf. Sci. 299–300, 965 (1994).

    Article  Google Scholar 

  7. Ch. Bai, Springer Ser. Surf. Sci. 32, 1 (2000).

    Google Scholar 

  8. C. J. Chen, Introduction to Scanning Tunneling Microscopy (Oxford Univ. Press, Oxford, 2008).

    Google Scholar 

  9. A. L. Vázquez de Parga and R. Miranda, Scanning Tunneling Spectroscopy, Encyclopedia of Nanotechnology (Springer Science + Business Media, Dordrecht, 2015).

    Google Scholar 

  10. B. Voigtländer, Scanning Probe Microscopy (Springer, Heidelberg, 2015).

    Book  Google Scholar 

  11. S. Urazhdin, D. Bilc, S. H. Tessmer, S. D. Mahanti, Th. Kyratsi, and M. G. Kanatzidis, Phys. Rev. B 66, 161306 (2002).

    Article  ADS  Google Scholar 

  12. J. Dai, D. West, X. Wang, Y. Wang, D. Kwok, S.-W. Cheong, S. B. Zhang, and W. Wu, Phys. Rev. Lett. 117, 106401 (2016).

    Article  ADS  Google Scholar 

  13. M. Passoni, F. Donati, A. Li Bassi, C. S. Casari, and C. E. Bottani, Phys. Rev. B 79, 045404 (2009).

    Article  ADS  Google Scholar 

  14. B. Koslowski, C. Dietrich, A. Tschetschetkin, and P. Ziemann, Phys. Rev. B 75, 035421 (2007).

    Article  ADS  Google Scholar 

  15. V. A. Ukraintsev, Phys. Rev. B 53, 11176 (1996).

    Article  ADS  Google Scholar 

  16. J. G. Simmons, J. Appl. Phys. 34, 2581 (1963).

    Article  ADS  Google Scholar 

  17. R. M. Feenstra, Phys. Rev. B 50, 4561 (1994).

    Article  ADS  Google Scholar 

  18. C. Wagner, R. Franke, and T. Fritz, Phys. Rev. B 75, 235432 (2007).

    Article  ADS  Google Scholar 

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Correspondence to S. V. Zaitsev-Zotov.

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Published in Russian in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2016, Vol. 104, No. 11, pp. 820–825.

The article was translated by the authors.

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Fedotov, N.I., Zaitsev-Zotov, S.V. Energy gap in tunneling spectroscopy: Effect of the chemical potential shift. Jetp Lett. 104, 800–805 (2016). https://doi.org/10.1134/S0021364016230028

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  • DOI: https://doi.org/10.1134/S0021364016230028

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