Convective terms and transversely driven charge-density waves

We derive the convective terms in the damping which determine the structure of the moving charge-density wave (CDW), and study the effect of a current flowing transverse to conducting chains on the CDW dynamics along the chai ns. In contrast to a recent prediction we find that the effect is orders of magnitude smaller, and that contributions from transverse currents of elec tron- and holelike quasiparticles to the force exerted on the CDW along the chains act in the opposite directions. We discuss recent experimental veri fication of the effect and demonstrate experimentally that geometry effects might mimic the transverse current effect.