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Linear Magnetoelectric Phase in Ultrathin MnPS₃ Probed by Optical Second Harmonic Generation

Chu, Hao and Roh, Chang Jae and Island, Joshua O. and Li, Chen and Lee, Sungmin and Chen, Jingjing and Park, Je-Geun and Young, Andrea F. and Lee, Jong Seok and Hsieh, David (2020) Linear Magnetoelectric Phase in Ultrathin MnPS₃ Probed by Optical Second Harmonic Generation. Physical Review Letters, 124 (2). Art. No. 027601. ISSN 0031-9007. doi:10.1103/physrevlett.124.027601.

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The transition metal thiophosphates MPS₃ (M=Mn, Fe, Ni) are a class of van der Waals stacked insulating antiferromagnets that can be exfoliated down to the ultrathin limit. MnPS₃ is particularly interesting because its Néel ordered state breaks both spatial-inversion and time-reversal symmetries, allowing for a linear magnetoelectric phase that is rare among van der Waals materials. However, it is unknown whether this unique magnetic structure of bulk MnPS₃ remains stable in the ultrathin limit. Using optical second harmonic generation rotational anisotropy, we show that long-range linear magnetoelectric type Néel order in MnPS₃ persists down to at least 5.3 nm thickness. However an unusual mirror symmetry breaking develops in ultrathin samples on SiO₂ substrates that is absent in bulk materials, which is likely related to substrate induced strain.

Item Type:Article
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URLURL TypeDescription Paper
Chu, Hao0000-0002-1989-9517
Hsieh, David0000-0002-0812-955X
Alternate Title:Linear magneto-electric phase in ultrathin MnPS₃ probed by optical second harmonic generation
Additional Information:© 2020 American Physical Society. Received 22 May 2019; published 16 January 2020. Work at Caltech and UCSB was supported by ARO MURI Grant No. W911NF-16-1-0361. Work at GIST was supported by National Research Foundation of Korea (NRF) grants funded by the Korea government (MSIP) (No. 2018R1A2B2005331). Work at IBS CCES was supported by Institute for Basic Science (IBS) in Korea (IBS-R009-G1). D. H. and J. S. L. also acknowledge support from a GIST-Caltech collaborative grant. J. O. I. acknowledges the support of the Netherlands Organization for Scientific Research (NWO) through the Rubicon grant, Project No. 680-50-1525/2474.
Group:Institute for Quantum Information and Matter
Funding AgencyGrant Number
Army Research Office (ARO)W911NF-16-1-0361
National Research Foundation of Korea2018R1A2B2005331
Institute for Basic Science (Korea)IBS-R009-G1
GIST-Caltech Research CollaborationUNSPECIFIED
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)680-50-1525/2474
Issue or Number:2
Record Number:CaltechAUTHORS:20200116-131511286
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100765
Deposited By: Tony Diaz
Deposited On:16 Jan 2020 21:30
Last Modified:16 Nov 2021 17:56

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