Universität zu Köln

Kiese, Dominik ORCID: 0000-0002-9263-8022, He, Yuchi, Hickey, Ciaran, Rubio, Angel ORCID: 0000-0003-2060-3151 and Kennes, Dante M. (2022). TMDs as a platform for spin liquid physics: A strong coupling study of twisted bilayer WSe2. APL Mater., 10 (3). MELVILLE: AIP Publishing. ISSN 2166-532X

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Abstract

The advent of twisted moire heterostructures as a playground for strongly correlated electron physics has led to a plethora of experimental and theoretical efforts seeking to unravel the nature of the emergent superconducting and insulating states. Among these layered compositions of two-dimensional materials, transition metal dichalcogenides are now appreciated as highly tunable platforms to simulate reinforced electronic interactions in the presence of low-energy bands with almost negligible bandwidth. Here, we focus on the twisted homobilayer WSe2 and the insulating phase at half-filling of the flat bands reported therein. More specifically, we explore the possibility of realizing quantum spin liquid (QSL) physics on the basis of a strong coupling description, including up to second-nearest neighbor Heisenberg couplings J(1) and J(2) as well as Dzyaloshinskii-Moriya (DM) interactions. Mapping out the global phase diagram as a function of an out-of-plane displacement field, we indeed find evidence for putative QSL states, albeit only close to SU(2) symmetric points. In the presence of finite DM couplings and XXZ anisotropy, long-range order is predominantly present with a mix of both commensurate and incommensurate magnetic phases. (C) 2022 Author(s).

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kiese, Dominik UNSPECIFIED orcid.org/0000-0002-9263-8022 UNSPECIFIED He, Yuchi UNSPECIFIED UNSPECIFIED UNSPECIFIED Hickey, Ciaran UNSPECIFIED UNSPECIFIED UNSPECIFIED Rubio, Angel UNSPECIFIED orcid.org/0000-0003-2060-3151 UNSPECIFIED Kennes, Dante M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-683629
DOI:	10.1063/5.0077901
Journal or Publication Title:	APL Mater.
Volume:	10
Number:	3
Date:	2022
Publisher:	AIP Publishing
Place of Publication:	MELVILLE
ISSN:	2166-532X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MAGIC-ANGLE; CORRELATED STATES; MOIRE BANDS; SUPERCONDUCTIVITY; INSULATOR; BEHAVIOR; PHASE; MODEL; MOTT Multiple languages Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68362