Controlling magnetic frustration in 1T-TaS2 via Coulomb engineered long-range interactions

Guangze Chen, Malte Rösner, Jose Lado

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Magnetic frustrations in two-dimensional materials provide a rich playground to engineer unconventional phenomena. However, despite intense efforts, a realization of tunable frustrated magnetic order in two-dimensional materials remains an open challenge. Here we propose Coulomb engineering as a versatile strategy to tailor magnetic ground states in layered materials. Using the frustrated van der Waals monolayer 1T-TaS2 as an example, we show how long-range Coulomb interactions renormalize the low energy nearly flat band structure, leading to a Heisenberg model which depends on the Coulomb interactions. Based on this, we show that superexchange couplings in the material can be precisely tailored by means of environmental dielectric screening, ultimately allowing to externally drive the material towards a tunable frustrated regime. Our results put forward Coulomb engineering as a powerful tool to manipulate magnetic properties of van der Waals materials.
Original languageEnglish
Article number485805
Pages (from-to)1-7
Number of pages7
JournalJournal of physics: Condensed matter
Volume34
Issue number48
DOIs
Publication statusPublished - 17 Oct 2022
MoE publication typeA1 Journal article-refereed

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  • -: Lado Jose AT-palkka

    Lado, J.

    01/09/202031/08/2025

    Project: Academy of Finland: Other research funding

  • -: Lado Jose AT-kulut

    Lado, J., Hyart, T., Kumar, P. & Koch, R.

    01/09/202031/08/2023

    Project: Academy of Finland: Other research funding

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