| Download | - View accepted manuscript: Triplet and in-gap magnetic states in the ground state of the quantum frustrated fcc antiferromagnet Ba2YMoO6 (PDF, 370 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1103/PhysRevB.84.100404 |
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| Author | Search for: Carlo, J. P.; Search for: Clancy, J. P.; Search for: Aharen, T.; Search for: Yamani, Z.1; Search for: Ruff, J. P. C.; Search for: Wagman, J. J.; Search for: Van Gastel, G. J.; Search for: Noad, H. M. L.; Search for: Granroth, G. E.; Search for: Greedan, J. E.; Search for: Dabkowska, H. A.; Search for: Gaulin, B. D. |
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| Affiliation | - National Research Council of Canada. NRC Canadian Neutron Beam Centre
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| Format | Text, Article |
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| Abstract | The geometrically frustrated double perovskite Ba2YMoO6 is characterized by quantum s=1/2 spins at the Mo5+ sites of an undistorted fcc lattice. Previous low-temperature characterization revealed an absence of static long-range magnetic order and suggested a nonmagnetic spin-singlet ground state. We report unique time-of-flight and triple-axis neutron spectroscopy of Ba2YMoO6 that shows a 28 meV spin excitation with a bandwidth of ∼4 meV, which vanishes above ∼125 K. We identify this as the singlet-triplet excitation that arises out of a singlet ground state, and further identify a weaker continuum of magnetic states within the gap, reminiscent of spin-polaron states arising due to weak disorder. |
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| Publication date | 2011-09-19 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 18702526 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 31f2e6b4-3919-4d75-878f-c9e3bbb63bb8 |
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| Record created | 2011-11-10 |
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| Record modified | 2020-04-21 |
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