The 77Se NMR spin lattice relaxation rate in (TMTSF)2PF6 in the regime of the Magic Angle Effect (MAE) exhibits no significant changes as the magnetic field orientation is rotated through the MAs, from which we conclude that there is no evidence for either a single-particle gap, or a gap in the spin excitation spectrum. Furthermore, no effect on the FISDW transition temperature was observed at the Magic Angles. As previously reported for (TMTSF)2PF6 at high pressures, the Knight shift in the superconducting state of (TMTSF)2ClO4 is inconsistent with a uniform singlet spin pairing.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
For a review, please see T. Ishiguro, K. Yamaji, G. Saito, Organic Superconductors, Springer, 2nd ed., (1998).
Osada T. et al. (1991). Phys. Rev. Lett. 66: 1525
Naughton M.J. et al. (1991). Phys. Rev. Lett. 67: 3712
Kang W. et al. (1992). Phys. Rev. Lett. 69: 2827
A.G. Lebed, Pis’ma Zh. Eksp. Teor. Fiz. (JETP), 43, 137 (1986); A.G. Lebed and P. Bak, Phys. Rev. Lett. 63, 1315 (1989).
Chashechkina E.I., Chaikin P.M. (2002). Phys. Rev. B 65: 012405
E.I. Chashechkina, P.M. Chaikin, Phys. Rev. Lett. 80, 2181 (1998); Syn. Met. 103 2176 (1999).
Kang H. et al. (2004). Phys. Rev. B 69: 033103
T. Osada et al., Phys. Rev. B 46, 1812 (1992); T. Osada, Physica B 256, 633 (1998); T. Osada et al., Synth. Met. 103, 2024 (1999).
K. Maki, Phys. Rev. B 45 R5111 (1992); V.M. Yakovenko, Phys. Rev. Lett. 68, 3607 (1992); P.M. Chaikin, Phys. Rev. Lett. 69, 2831 (1992).
Strong S.P. et al. (1994). Phys. Rev. Lett. 73: 1007
Lebed A.G. (2004). Phys. Rev. Lett. 93: 157006
Ong N.P. et al. (2004). Europhys. Lett. 66: 579
Weida Wu., Chaikin P.M., Kang W., Shinagawa J., Yu W., Brown S.E. (2005). Phys. Rev. Lett. 94: 097004
Vescoli V. et al. (1998). Science 281: 1181
Lorenz T. et al. (2002). Nature 418: 614
D. Jerome et al., J. Phys. Lett. 41, L95 (1980); M.Y. Choi et al., Phys. Rev. B 25, 6208 (1982); S. Bouffard et al., J. Phys. C 15, 2951 (1982); M. Takigawa et al., J. Phys. Soc. Japan. 56,873 (1987);
Lee I.J. et al. (1997). Phys. Rev. Lett. 78: 3555
Lee I.J., Brown S.E., Clark W.G., Strouse M.J., Naughton M.J., Kang W., Chaikin P.M. (2002). Phys. Rev. Lett. 88: 017004
Lee I.J., Chow D.S., Clark W.G., Strouse M.J., Naughton M.J., Chaikin P.M., Brown S.E. (2003). Phys. Rev. B. 68: 092510
Oh J.I., Naughton M.J. (2004). Phys. Rev. Lett. 92: 067001
Schwenk H., Andres K., Wudl F. (1984). Phys. Rev. B. 29: 500
Takigawa M., Saito G. (1986). J. Phys. Soc. Japan 55: 1233
Zhang F., Kurosaki Y., Shinagawa J., Alavi B., Brown S.E. (2005). Phys. Rev. B 72: 060501
J. Shinagawa et al. (to be published).
Fulde P., Maki K. (1965). Phys. Rev. 139: A788
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Shinagawa, J., Wu, W., Chaikin, P.M. et al. 77 Se NMR Studies on Magic Angle Effect and Nature of the Superconducting State in the Organic Superconductors (TMTSF)2X. J Low Temp Phys 142, 231–236 (2006). https://doi.org/10.1007/s10909-006-9192-x
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10909-006-9192-x