# Charge density waves -- Shunted resistance

1. Oct 26, 2015

### LagrangeEuler

In charge density wave systems in paper http://journals.aps.org/prb/abstract/10.1103/PhysRevB.37.10055
subharmonic steps are detected in experiments from the differential resistance $\frac{dV}{dI}$, instead of from $I-V$ characteristic. Since the charge density wave resistance is shunted by an Ohmic resistance. So in this paper authors define that when in $\frac{dV}{dI}$ curve we have jumps while in $I-V$ characteristic we will have steps. Very strange. How they really knows this?

2. Oct 31, 2015