On the superconducting state of the organic conductor $(TMTSF)_2ClO_4$

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$(TMTSF)_2ClO_4$ is a quasi-one dimensional organic conductor and superconductor with $T_c=1.4$K, and one of at least two Bechgaard salts observed to have upper critical fields far exceeding the paramagnetic limit. Nevertheless, the $^{77}$Se NMR Knight shift at low fields reveals a decrease in spin susceptibility $χ_s$ consistent with singlet spin pairing. The field dependence of the spin-lattice relaxation rate at 100mK exhibits a sharp crossover (or phase transition) at a field $H_s\sim15$kOe, to a regime where $χ_s$ is close to the normal state value, even though \hc2 $\gg H_s$.
4 pages, 4 figures, Version 2: 2 sentence ammendaments on the last page, changes in references, corrected untits in Fig. 3.

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Strongly Correlated Electrons, Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/126723

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0701566
 http://arxiv.org/abs/cond-mat/0701566

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arXiv