Issue 46, 2019

Negative differential resistance observed on the charge density wave of a transition metal dichalcogenide

Abstract

Charge density waves and negative differential resistance are seemingly unconnected physical phenomena. The former is an ordered quantum fluid of electrons, intensely investigated for its relation with superconductivity, while the latter receives much attention for its potential applications in electronics. Here we show that these two phenomena can not only coexist but also that the localized electronic states of the charge density wave are essential to induce negative differential resistance in a transition metal dichalcogenide, 1T-TaS2. Using scanning tunneling microscopy and spectroscopy, we report the observation of negative differential resistance in the commensurate charge density wave state of 1T-TaS2. The observed phenomenon is explained by the interplay of interlayer and intra-layer tunneling with the participation of the atomically localized states of the charge density wave maxima and minima. We demonstrate that lattice defects can locally affect the coupling between the layers and are therefore a mechanism to realize NDR in these materials.

Graphical abstract: Negative differential resistance observed on the charge density wave of a transition metal dichalcogenide

Supplementary files

Article information

Article type
Paper
Submitted
11 Sep 2019
Accepted
07 Nov 2019
First published
08 Nov 2019

Nanoscale, 2019,11, 22351-22358

Author version available

Negative differential resistance observed on the charge density wave of a transition metal dichalcogenide

A. Luican-Mayer, Y. Zhang, A. DiLullo, Y. Li, B. Fisher, S. E. Ulloa and S. Hla, Nanoscale, 2019, 11, 22351 DOI: 10.1039/C9NR07857F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements