Phason excitations in the SDW state of (TMTSF)2PF6
نویسندگان
چکیده
We have measured the frequency dependent conductivity at various temperatures below the SDW transition in (TMTSF )~PF~. We find two distinct resonances which we ascribe to intemal deformations and pinned mode oscillations of the SDW condensate. Furthermore, the spectral weight of the pinned mode resonance is found to be nearly temperature independent below the SDW transition. Our findings are contrasted with various models and suggestions on the electrodynamics of the SDW ground state.
منابع مشابه
Impurity scattering and frequency dependent conductivity in spin density waves
– The quasiparticle contribution to the frequency dependent electric conductivity in the presence of randomly distributed impurities is calculated within mean field theory for spin density waves as formed in quasi one dimensional conductors like Bechgaard salts. Interchain hopping is taken into account and the effects of imperfect nesting are considered. In case of an electric field perpendicul...
متن کاملAnisotropy and field-dependence of the spin-density-wave dynamics in the quasi one-dimensional conductor (TMTSF)2PF6
The anisotropic and non-linear transport properties of the quasi one-dimensional organic conductor (TMTSF)2PF6 have been studied by dc, radiofrequency, and microwave methods. Microwave experiments along all three axes reveal that collective transport, which is considered to be the fingerprint of the spin-density-wave condensate, also occurs in the perpendicular b′ direction. The pinned mode res...
متن کاملSpin-density-wave transition of (TMTSF)2PF6 at high magnetic fields
The transverse magnetoresistance of the Bechgaard salt (TMTSF)2PF6 has been measured for various pressures, with the field up to 24 T parallel to the lowest conductivity direction c. A quadratic behavior is observed in the magnetic field dependence of the spin-density-wave (SDW) transition temperature TSDW. With increasing pressure, TSDW decreases and the coefficient of the quadratic term incre...
متن کاملCoexistence of Superconductivity and Spin Density Wave orderings in the organic superconductor (TMTSF)2PF6
The phase diagram of the organic superconductor (TMTSF)2PF6 has been revisited using transport measurements with an improved control of the applied pressure. We have found a 0.8 kbar wide pressure domain below the critical point (9.43 kbar, 1.2 K) for the stabilisation of the superconducting ground state featuring a coexistence regime between spin density wave (SDW) and superconductivity (SC). ...
متن کاملStructural Aspects of the Bechgaard Salts and Related Compounds
Structural aspects of the Bechgaard salts (TMTSF)2X and related 2:1 salts. mostly based on the sulfur donors TMTTF and BCPOITF as well as on the hybrid TMDTDSF dorlor, are considered in relationship with their physical properties. The basic structure of these softs is revie~ved with a special emphasize on the dimerization of the organic stack and on the disorder of the aurons IX). 0lhen the den...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2016