Giant Angular Dependent Nernst Effect in the Q1D Organic conductor (TMTSF)${}_2$PF${}_6$

Abstract

We present a detailed study of the Nernst effect N${}_{zx}$ in (TMTSF)${}_2$PF${}_6$ as a function of temperature, magnetic field magnitude and direction and pressure. As previously reported there is a large resonant-like structure as the magnetic field is rotated through crystallographic directions, the Lebed Magic Angles. These Nernst effect resonances strongly suggest that the transport of the system is effectively ``coherent'' only in crystallographic planes along or close to the applied field direction. We also present analytical and numerical calculations of the conductivity and thermoelectric tensors for (TMTSF)${}_2$PF${}_6$, based on a Boltzmann transport model within the semi-classical approximation. The Boltzmann transport calculation fails to describe the experiment data. We suggest that the answer may lie in field induced decoupling of the strongly correlated chains.

17 pages, 18 figures

References in corpus (5)

• The onset of the vortex-like Nernst signal above Tc in La_{2-x}Sr_xCuO_4 and Bi_2Sr_{2-y}La_yCuO_6
• The high-field phase diagram of the cuprates derived from the Nernst effect
• Theory of Thermodynamic Magnetic Oscillations in Quasi-One-Dimensional Conductors
• Resonant Nernst effect in the metallic and field-induced spin density wave states of (TMTSF)2ClO4
• Phase coherence and the Nernst effect at magic angles in organic conductors

Cited by in corpus (8)

• The Nernst effect and the boundaries of the Fermi liquid picture
• Theory of dissipationless Nernst effects
• Interlayer Aharonov-Bohm interference in tilted magnetic fields in quasi-one-dimensional layered conductors
• Unification Theory of Angular Magnetoresistance Oscillations in Quasi-One-Dimensional Conductors
• Angular magnetoresistance oscillations in quasi-one-dimensional organic conductors in the presence of a crystal superstructure
• Angular dependent magnetothermopower of alpha-(ET)2KHg(SCN)4
• Transverse Thermoelectric Response as a Probe for Existence of Quasiparticles
• Quantum limit in a quasi-one-dimensional conductor in a high tilted magnetic field