Se77nuclear magnetic resonance in di-tetramethyltetraselenafulvalene phosphorous hexafluoride [

Macroscopically inhomogeneous state at the boundary between the superconducting, antiferromagnetic, and metallic phases in quasi-one-dimensional(TMTSF)2PF6Kornilov1, Pudalov2, Kitaoka3 et al. 2004Phys. Rev. B430250View full textAdd to dashboardCite

“…The conclusions we draw do not depend on any model assumptions about the spatial arrangement of the two-phase state, because for identifying the phase content we used qualitative difference in the magnetoresistance behavior in the AF and M states. Our results are in a good agreement with previous data, [13][14][15] obtained in different ways.…”

“…However, some earlier measurements indicated the presence of an inhomogeneous state in (TMTSF) 2 PF 6 , in the vicinity of the critical pressure. [13][14][15] Specifically, in Ref. 13, from measurements of the Knight shift in 77 Se nuclear magnetic resonance, a quenching of the spin-density wave state was found to be a slow function of pressure; this was interpreted as an indication of the coexistence of the SDW and metallic states.…”

“…Thus, our results demonstrate that a macroscopically inhomogeneous state with spatially separated phases emerges at the transition from the AF to M phase; this is in agreement with the preceding data. [13][14][15] …”

Solid-state selenium-77 NMR

“…Applications of strong magnetic fields, >15 T, have induced an additional SDW state, a so-called field-induced SDW, observed as a discontinuity in the T À1 1 vs T plot around 4 K and suggest that additional FISDW states could be found in the presence of even higher applied magnetic field strengths [133,140]. Transition to the initial insulating SDW state at ambient pressure can be suppressed with the application of pressure, where metallic character is retained down to 1.2 K under applied pressures greater than 8 kbar [130,137,139,141]. (TMTSF) 2 PF 6 is well known as the first organic molecular superconductor [19,142], but the nature of the superconducting phase has only recently been investigated by solid-state 77 Se NMR.…”

Spin-density-wave state in(TMTSF)2PF6: AValfells1, Kuhns2, Kleinhammes3 et al. 1997Phys. Rev. B

“…The nature of these transitions-which are driven by repulsive and attractive electron correlations-is particularly sensitive to the physical and electronic structure of these materials, and the ground states may be probed and/or altered by high magnetic fields. For example, the Bechgaard salts, of which ͑TMTSF͒ 2 PF 6 and ͑TMTSF͒ 2 ClO 4 are members, exhibit unusual properties in high magnetic fields, including field-induced spin density wave transitions ͑FISDW͒, anomalous quantum limit states, and anomalous quantum oscillation ͑and oscillation attenua-tion͒ behavior. 3,4 NMR is a powerful probe of density wave and superconducting ground states.…”