Magnetic field induced partially polarized chiral spin liquid in a transition metal dichalcogenide moiré system

Huang, Yixuan; Sheng, D. N.; Zhu, Jian-Xin

doi:10.1103/physrevb.109.165109

Title: Magnetic field induced partially polarized chiral spin liquid in a transition metal dichalcogenide moiré system

Journal Article · 01 April 2024 · Physical Review. B

DOI: https://doi.org/10.1103/physrevb.109.165109 · OSTI ID:2367287

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Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); CSUN
California State University, Northridge (CSUN), CA (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

As one of the most intriguing states of matter, the chiral spin liquid (CSL) has attracted much scientific interest while its existence and mechanism in crystalline strongly correlated systems remain hotly debated. On the other hand, strong correlation driven emergent phenomena can be realized in twisted transition metal dichalcogenide bilayers with a tremendously tunable large length scale providing a new platform for the emergence of CSLs. Here, we focus on a strongly correlated model relevant to heterobilayer WSe₂/MoSe₂ and investigate the Mott insulating phase at half filling under an out-of-plane magnetic field. Considering both its orbital and spin Zeeman effects we identify three conventionally ordered phases including a 120° Néel phase, a stripe phase, and an up-up-down phase. For intermediate fields an emergent quantum spin liquid phase is identified with partial spin polarization. We further characterize its topological nature as the v = 1/2 Laughlin CSL through the topological entanglement spectrum and quantized spin pumping under spin flux insertion. In addition, we map out the quantum phase diagram for different twisted angles in an experimentally accessible parameter regime.

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Research Organization:: California State University, Northridge (CSUN), CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-06ER46305; 89233218CNA000001

OSTI ID:: 2367287

Alternate ID(s):: OSTI ID: 2568892

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 16 Vol. 109; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Magnetic field induced partially polarized chiral spin liquid in a transition metal dichalcogenide moiré system

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