Observation of resistive switching and diode effect in the conductivity of TiTe2 point contacts
Year: 2025
Type: article
Abstract: We measured the I(V) and dV/dI(V) characteristics of TiTe2-based point contacts (PCs) from room to helium temperatures. Features indicating the emergence of charge density wave (CDW) were detected. They represent symmetrical relatively V = 0 maxima in dV/dI(V) around ±150 mV at liquid helium temperatures, which disappear above 150 K, similar to the case of sister CDW compound TiSe2. Applying higher voltages above 200 mV, we observed resistive switching in TiTe2 PCs from a metallic-like low-resistance state to a non-metallic type high-resistance state with a change of resistance by an order of magnitude. A unique diode-like effect was registered in “soft” TiTe2 PCs with hysteretic I(V) at the negative voltage on TiTe2. Discovering the resistive switching and diode effect adds TiTe2 to the transition-metal dichalcogenides, which could be useful in developing non-volatile ReRAM and other upcoming nanotechnologies.
Source: Low Temperature Physics
DOI: 10.1063/10.0036929
Institutions: Leibniz Institute for Solid State and Materials Research, B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, Indian Institute of Science Education and Research Pune, G.V. Kurdyumov Institute for Metal Physics, Kyiv Academic University, Complexity, Topology and Dynamics in Quantum Matter, Technische Universität Dresden
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4411875729