Evidence of the Berezinskii-Kosterlitz-Thouless phase in a frustrated magnet.
Evidence of the Berezinskii-Kosterlitz-Thouless phase in a frustrated magnet.
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受挫磁体中 Berezinskii-Kosterlitz-Thouless 相的证据。
DOI:
10.1038/s41467-020-19380-x
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发表时间:
2020-11-06
影响因子:
16.6
通讯作者:
Yu W
中科院分区:
文献类型:
--
作者:
Hu Z;Ma Z;Liao YD;Li H;Ma C;Cui Y;Shangguan Y;Huang Z;Qi Y;Li W;Meng ZY;Wen J;Yu W
The Berezinskii-Kosterlitz-Thouless (BKT) mechanism, building upon proliferation of topological defects in 2D systems, is the first example of phase transition beyond the Landau-Ginzburg paradigm of symmetry breaking. Such a topological phase transition has long been sought yet undiscovered directly in magnetic materials. Here, we pin down two transitions that bound a BKT phase in an ideal 2D frustrated magnet TmMgGaO4, via nuclear magnetic resonance under in-plane magnetic fields, which do not disturb the low-energy electronic states and allow BKT fluctuations to be detected sensitively. Moreover, by applying out-of-plane fields, we find a critical scaling behavior of the magnetic susceptibility expected for the BKT transition. The experimental findings can be explained by quantum Monte Carlo simulations applied on an accurate triangular-lattice Ising model of the compound which hosts a BKT phase. These results provide a concrete example for the BKT phase and offer an ideal platform for future investigations on the BKT physics in magnetic materials.
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影响因子:
8.6
作者:
Jeong, M.;Mayaffre, H.;Horvatic, M.
通讯作者:
Horvatic, M.
DOI:
10.1088/0022-3719/6/7/010
发表时间:
1973-01-01
期刊:
JOURNAL OF PHYSICS C-SOLID STATE PHYSICS
影响因子:
--
作者:
Kosterlitz, JM;Thouless, DJ
通讯作者:
Thouless, DJ
影响因子:
8.6
作者:
EPSTEIN, K;GOLDMAN, AM;KADIN, AM
通讯作者:
KADIN, AM
影响因子:
8.6
作者:
Damle, Kedar
通讯作者:
Damle, Kedar
影响因子:
8.6
作者:
Julien, MH;Fehér, T;Marucco, JF
通讯作者:
Marucco, JF