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Abstract
The spin−1/2 Heisenberg antiferromagnetic chain is ideal for realizing one of the simplest gapless quantum spin liquids (QSLs), supporting a many-body ground state whose elementary excitations are fractional fermionic excitations called spinons. Here we report the discovery of such a one-dimensional (1D) QSL in Cs4CuSb2Cl12. Compared to previously reported S=1/2 1D chains, this material possesses a wider temperature range over which the QSL state is stabilized. We identify spinon excitations extending at T>0.8K, with a large T-linear contribution to the specific heat, γ=31.5(2)mJmol−1K−2, which contribute itinerantly to thermal transport up to temperatures as high as T=35K. At T=0.7K, we find a second-order phase transition that is unchanged by a μ0H=5T magnetic field. Cs4CuSb2Cl12 reveals new phenomenology deep in the 1D QSL regime, supporting a gapped QSL phase over a wide temperature range compared to many other experimental realizations.
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Authors (7)
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Thao Tran
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Chris A. Pocs
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Yubo Zhang
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Jianwei Sun
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Minhyea Lee
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Tyrel McQueen
Cite as
Full text
- Publication version
- Accepted or Published Version
- License
- Copyright (2020 American Physical Society)
Keywords
Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
PHYSICAL REVIEW B
no. 101,
ISSN: 2469-9950 - Language:
- English
- Publication year:
- 2020
- Bibliographic description:
- Tran T., Pocs C., Zhang Y., Winiarski M., Sun J., Lee M., Mcqueen T.: Spinon excitations in the quasi-one-dimensional S=12 chain compound Cs4CuSb2Cl12// PHYSICAL REVIEW B -Vol. 101, (2020), s.23507-
- DOI:
- Digital Object Identifier (open in new tab) 10.1103/physrevb.101.235107
- Verified by:
- Gdańsk University of Technology
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