Possible charge-density-wave signatures in the anomalous resistivity of Li-intercalated multilayer MoS2

Erik Piatti; Qihong Chen; Mauro Tortello; Jianting Ye; Renato S. Gonnelli

doi:10.1016/j.apsusc.2018.05.232

paper

Possible charge-density-wave signatures in the anomalous resistivity of Li-intercalated multilayer MoS2

arXiv:1802.08449 · doi:10.1016/j.apsusc.2018.05.232

Abstract

We fabricate ion-gated field-effect transistors (iFET) on mechanically exfoliated multilayer MoS $_{2}$ . We encapsulate the flake by Al $_{2}$ O $_{3}$ , leaving the device channel exposed at the edges only. A stable Li $^{+}$ intercalation in the MoS $_{2}$ lattice is induced by gating the samples with a Li-based polymeric electrolyte above $\sim$ 330 K and the doping state is fixed by quenching the device to $\sim$ 300 K. This intercalation process induces the emergence of anomalies in the temperature dependence of the sheet resistance and its first derivative, which are typically associated with structural/electronic/magnetic phase transitions. We suggest that these anomalies in the resistivity of MoS $_{2}$ can be naturally interpreted as the signature of a transition to a charge-density-wave phase induced by lithiation, in accordance with recent theoretical calculations.

8 pages, 4 figures