Magnetic-field dependence of phase correlation length in spin- and charge-density waves

Negative Longitudinal Magnetoresistance in the Density Wave Phase of Y2Ir2O7Juyal1, Agarwal2, Mukhopadhyay3 2018Phys. Rev. Lett.283230View full textAdd to dashboardCite

“…In the weak pinning limit, a magnetic field perpendicular to the conducting plane of a DW reduces the elastic constant associated with the transverse phase distortion of the DW, leading to an increase in the threshold electric field. A similar argument for the increase of V T with application of transverse magnetic field has also been shown to work in the strong pinning limit so long as there is imperfect nesting [26].…”

“…al. [26]. In the weak pinning limit, a magnetic field perpendicular to the conducting plane of a DW reduces the elastic constant associated with the transverse phase distortion of the DW, leading to an increase in the threshold electric field.…”

Destruction of Density-Wave States by a Pseudogap in High Magnetic Fields: Application to (TMTSF)2ClO4McKenzie1 1995Phys. Rev. Lett.7140View full textAdd to dashboardCite

“…The important point is that as the transverse correlation length ξ b decreases ψ increases. Bjeliš and Maki [16] considered the effect of a large magnetic field parallel to the c direction (the least conducting direction) on the CDW and SDW correlations length in the a and b directions. They showed that, while ξ a was not significantly affected, ξ b is a decreasing function of magnetic field (inset of Figure 1).…”

Thermodynamics of the spin-density wave transition in (TMTSF)2PF6

“…Even so, the temperature dependence of the order parameter [7], as determined by muon spin-rotation (^+SR) measurements, is very similar to that observed for 2D Heisenberg systems such as K2NiF 4 [8]. The picture we adopt includes a 2D-3D crossover for the SDW fluctuations, and the strength of the 2D fluctuations is weak compared to the 3D behavior close to TSDW-Finally, while transverse magnetic fields have been shown to have interesting consequences on both the single-particle and collective transport in (TMTSF)2PF6 [9-11], our measurements indicate there is no enhancement of the fluctuations in the 3D regime in the manner described by Bjelis and Maki [12].The samples used in this set of measurements were (TMTSF)2PF6 needles, grown by the standard electrochemical methods at UCLA. Transport measurements on crystals from the same batch indicate the resistive transition is sharply defined at 12.1 K, and give threshold fields for nonlinear conduction of approximately 1-3 mV/cm.…”

“…Even so, the temperature dependence of the order parameter [7], as determined by muon spin-rotation (^+SR) measurements, is very similar to that observed for 2D Heisenberg systems such as K2NiF 4 [8]. The picture we adopt includes a 2D-3D crossover for the SDW fluctuations, and the strength of the 2D fluctuations is weak compared to the 3D behavior close to TSDW-Finally, while transverse magnetic fields have been shown to have interesting consequences on both the single-particle and collective transport in (TMTSF)2PF6 [9][10][11], our measurements indicate there is no enhancement of the fluctuations in the 3D regime in the manner described by Bjelis and Maki [12].…”