(93)Nb NMR spin echo spectroscopy in single crystal NbSe(3)

S. Suh (1) , W.G. Clark (1) , Pierre Monceau (2) , R.E. Thorne (3) , S.E. Brown (1)

1 Department of Physics and Astronomy [UCLA, Los Angeles]
2 NEEL - MagSup - Magnétisme et Supraconductivité
3 Department of Physics [Ithaca]

We report electric field induced phase displacements of the charge density wave (CDW) in a single crystal of NbSe(3) using (93)Nb NMR spin-echo spectroscopy. CDW polarizations in the pinned state induced by unipolar and bipolar pulses are linear and reversible up to at least E = (0.96)E(T). The polarizations have a broad distribution extending up to phase angles of order 60 degrees for electric fields close to threshold. No evidence for polarizations in excess of a CDW wavelength or for a divergence in polarization near ET are observed. The results are consistent with elastic depinning models, provided that the critical regime expected in large systems is not observable.

Domaines: Electrons fortement corrélés [cond-mat.str-el]

S. Suh, W.G. Clark, Pierre Monceau, R.E. Thorne, S.E. Brown. (93)Nb NMR spin echo spectroscopy in single crystal NbSe(3). Physical Review Letters, 2008, 101 (13), pp.136407. ⟨10.1103/PhysRevLett.101.136407⟩. ⟨hal-00966731⟩