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Theory of superconductivity in strongly correlated electron systems

Chyh-Hong Chern

Department of Physics, National Taiwan University, Taipei 10617, Taiwan, ROC

E-mail Address: chchern@ntu.edu.tw; chern@alumni.stanford.edu

https://doi.org/10.1142/S0217979218502570Cited by:1 (Source: Crossref)

Abstract

In the correlated electron system with the pseudogap, full-gapped domains and Fermi-arced domains coexist. These domains are created by the quantum-fluctuated antiferromagnetic correlation that generates the short-ranged attractive potential to produce the Fermi arcs and the superconductivity. In the full-gapped domains, s-wave or $(d_{x^{2} - y^{2}}^{2} \pm i d_{x y})$ $(d_{x^{2} - y^{2}} \pm i d_{x y})$ -wave symmetry of the electron pairs is favored. In the Fermi-arced domains, only $d_{x^{2} - y^{2}}^{2}$ $d_{x^{2} - y^{2}}$ -wave symmetry of pairs is stable. Superconductivity of different pairing symmetry coexists in different domains as well. Different from the Cooper pairs, the correlated electrons pair up in the real space with an energy gap. Gapless states, on the contrary, hinder the development of superconductivity.

Keywords:

PACS: 74.20.-2, 74.20.Mn, 74.20.Rp

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References

1. J. Bardeen, L. N. Cooper and J. R. Schrieffer, Phys. Rev. 106, 162 (1957). Web of Science, ADS, Google Scholar
2. J. Bardeen, L. N. Cooper and J. R. Schrieffer, Phys. Rev. 108, 1175 (1957). Web of Science, ADS, Google Scholar
3. J. G. Bednorz and K. A. Müller, Z. Phys. B: Condens. Matt. 64, 189 (1986). Web of Science, ADS, Google Scholar
4. D. Vaknin et al., Phys. Rev. Lett. 58, 2808 (1987). Web of Science, ADS, Google Scholar
5. A. Damascelli et al., Rev. Mod. Phys. 75, 473 (2003). Web of Science, ADS, Google Scholar
6. N. Doiron-Leyraud et al., Nature 447, 565 (2007). Web of Science, ADS, Google Scholar
7. S. Sakai, Y. Motome and M. Imada, Phys. Rev. Lett. 102, 056404 (2009). Web of Science, ADS, Google Scholar
8. S. Sakai, et al., Phys. Rev. Lett. 111, 107001 (2013). Web of Science, ADS, Google Scholar
9. H. Alloul, T. Ohno and P. Mendels, Phys. Rev. Lett. 63, 1700 (1989). Web of Science, ADS, Google Scholar
10. T. Wu et al., Nature 477, 191 (2011). Web of Science, ADS, Google Scholar
11. G. Ghiringhelli et al., Science 337, 821 (2012). Web of Science, ADS, Google Scholar
12. J. Xia et al., Phys. Rev. Lett. 100, 127002 (2008). Web of Science, ADS, Google Scholar
13. C.-H. Chern, Ann. Phys. 350, 159 (2014). Web of Science, ADS, Google Scholar
14. X.-G. Wen, Phys. Rev. B 39, 7223 (1989). Web of Science, ADS, Google Scholar
15. M.-K. Lee, T.-S. Huang and C.-H. Chern, Results in Physics 10, 444 (2018). Web of Science, ADS, Google Scholar
16. M. Hasimoto et al., Nat. Phys. 10, 483 (2014). Web of Science, Google Scholar
17. D. LeBoeuf et al., Phys. Rev. B 83, 054506 (2011). Web of Science, ADS, Google Scholar
18. V. A. Sidorov et al., Phys. Rev. Lett. 89, 157004 (2002). Web of Science, ADS, Google Scholar
19. T. Sato et al., J. Phys. Soc. Japan 77, 063708 (2008). Google Scholar
20. N.-C. Yeh et al., Phys. Rev. Lett. 87, 087003 (2001). Web of Science, ADS, Google Scholar
21. M.-Q. Ren et al., Chin. Phys. Lett. 33, 127402 (2016). Web of Science, ADS, Google Scholar