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Noncentrosymmetric Triangular Magnet CaMnTeO6: Strong Quantum Fluctuations and Role of s0 versus s2 Electronic States in Competing Exchange Interactions
Abstract
Noncentrosymmetric triangular magnets offer a unique platform for realizing strong quantum fluctuations. However, designing these quantum materials remains an open challenge attributable to a knowledge gap in the tunability of competing exchange interactions at the atomic level. Here, a new noncentrosymmetric triangular S = 3/2 magnet CaMnTeO6 is created based on careful chemical and physical considerations. The model material displays competing magnetic interactions and features nonlinear optical responses with the capability of generating coherent photons. The incommensurate magnetic ground state of CaMnTeO6 with an unusually large spin rotation angle of 127°(1) indicates that the anisotropic interlayer exchange is strong and competing with the isotropic interlayer Heisenberg interaction. The moment of 1.39(1) µB, extracted from low-temperature heat capacity and neutron diffraction measurements, is only 46% of the expected value of the static moment 3 µB. This reduction indicates the presence of strong quantum fluctuations in the half-integer spin S = 3/2 CaMnTeO6 magnet, which is rare. By comparing the spin-polarized band structure, chemical bonding, and physical properties of AMnTeO6 (A = Ca, Sr, Pb), how quantum-chemical interpretation can illuminate insights into the fundamentals of magnetic exchange interactions, providing a powerful tool for modulating spin dynamics with atomically precise control is demonstrated.
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Authors (13)
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Xudong Huai
- Department of Chemistry, Clemson University
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Emmanuel Acheampong
- Department of Chemistry, Clemson University
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Erich Delles
- Department of Chemistry, Clemson University
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Maurice Sorolla II
- Institute of Chemistry, University of the Philippines Diliman
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Lila Nassar
- School of Physics, Georgia Institute of Technology
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Mingli Liang
- Department of Chemistry, University of Houston
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Caleb Ramette
- Department of Materials Science and Engineering, University of Utah
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Huiwen Ji
- Department of Materials Science and Engineering, University of Utah
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Allen Scheie
- MPA-Q, Los Alamos National Laboratory
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Stuart Calder
- Neutron Scattering Division, Oak Ridge National Laboratory
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Martin Mourigal
- School of Physics, Georgia Institute of Technology
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Thao Tran
- Department of Chemistry, Clemson University
Cite as
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- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1002/adma.202313763
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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ADVANCED MATERIALS
no. 36,
pages 1 - 14,
ISSN: 0935-9648 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Huai X., Acheampong E., Delles E., Winiarski M., Sorolla II M., Nassar L., Liang M., Ramette C., Ji H., Scheie A., Calder S., Mourigal M., Tran T.: Noncentrosymmetric Triangular Magnet CaMnTeO6: Strong Quantum Fluctuations and Role of s0 versus s2 Electronic States in Competing Exchange Interactions// ADVANCED MATERIALS -Vol. 36,iss. 24 (2024), s.1-14
- DOI:
- Digital Object Identifier (open in new tab) 10.1002/adma.202313763
- Sources of funding:
-
- Free publication
- Verified by:
- Gdańsk University of Technology
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