The low-temperature highly correlated quantum phase in the charge-density-wave 1T-TaS2 compound

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Title
The low-temperature highly correlated quantum phase in the charge-density-wave 1T-TaS2 compound
Author(s)
Marie Kratochvilova; Adrian D. Hillier; Andrew R. Wildes; Lihai Wang; Sang-Wook Cheong; Je-Geun Park
Publication Date
2017-08
Journal
NPJ Quantum Materials, v.2, no., pp.42 -
Publisher
Nature Publishing Group
Abstract
A prototypical quasi-2D metallic compound, 1T-TaS2 has been extensively studied due to an intricate interplay between a Mott-insulating ground state and a charge-density-wave order. In the low-temperature phase, 12 out of 13 Ta4+ 5d-electrons form molecular orbitals in hexagonal star-of-David patterns, leaving one 5d-electron with S = ½ spin free. This orphan quantum spin with a large spin-orbit interaction is expected to form a highly correlated phase of its own. And it is most likely that they will form some kind of a short-range order out of a strongly spin-orbit coupled Hilbert space. In order to investigate the low-temperature magnetic properties, we performed a series of measurements including neutron scattering and muon experiments. The obtained data clearly indicate the presence of the short-ranged phase and put the upper bound on ~0.4 µB for the size of the magnetic moment, consistent with the orphan-spin scenario. © The Author(s) 2017
URI
https://pr.ibs.re.kr/handle/8788114/4028
ISSN
2397-4648
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
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