We fabricate ion-gated field-effect transistors (iFET) on mechanically exfoliated multilayer MoS2. We encapsulate the flake by Al2O3, leaving the device channel exposed at the edges only. A stable Li+ intercalation in the MoS2 lattice is induced by gating the samples with a Li-based polymeric electrolyte above  ~ 330 K and the doping state is fixed by quenching the device to ~ 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 MoS2 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.

Possible charge-density-wave signatures in the anomalous resistivity of Li-intercalated multilayer MoS2 / Piatti, Erik; Chen, Qihong; Tortello, Mauro; Ye, Jianting; Gonnelli, Renato. - In: APPLIED SURFACE SCIENCE. - ISSN 0169-4332. - STAMPA. - 461:(2018), p. 269. [10.1016/j.apsusc.2018.05.232]

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

Erik Piatti;Mauro Tortello;Renato Gonnelli
2018

Abstract

We fabricate ion-gated field-effect transistors (iFET) on mechanically exfoliated multilayer MoS2. We encapsulate the flake by Al2O3, leaving the device channel exposed at the edges only. A stable Li+ intercalation in the MoS2 lattice is induced by gating the samples with a Li-based polymeric electrolyte above  ~ 330 K and the doping state is fixed by quenching the device to ~ 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 MoS2 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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2715848
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