Quantum spin-liquid states in an organic magnetic layer and molecular rotor hybrid

0536973 - ÚOCHB 2021 RIV US eng J - Journal Article
Szirmai, P. - Méziere, C. - Bastien, Guillaume - Wzietek, P. - Batail, P. - Martino, E. - Mantulnikovs, K. - Pisoni, A. - Riedl, K. - Cottrell, S. - Baines, C. - Forró, L. - Náfrádi, B.
Quantum spin-liquid states in an organic magnetic layer and molecular rotor hybrid.
Proceedings of the National Academy of Sciences of the United States of America. Roč. 117, č. 47 (2020), s. 29555-29560. ISSN 0027-8424. E-ISSN 1091-6490
Institutional support: RVO:61388963
Keywords : quantum spin liquid * QSL * molecular rotor * triangular lattice * quenched randomness
OECD category: Physical chemistry
Impact factor: 11.205, year: 2020
Method of publishing: Limited access
https://doi.org/10.1073/pnas.2000188117

The exotic properties of quantum spin liquids (QSLs) have continually been of interest since Anderson's 1973 ground-breaking idea. Geometrical frustration, quantum fluctuations, and low dimensionality are the most often evoked material's characteristics that favor the long-range fluctuating spin state without freezing into an ordered magnet or a spin glass at low temperatures. Among the few known QSL candidates, organic crystals have the advantage of having rich chemistry capable of finely tuning their microscopic parameters. Here, we demonstrate the emergence of a QSL state in [EDT-TTF-CONH2](2)(+)[BABCO(-)] (EDT-BCO), where the EDT molecules with spin-1/2 on a triangular lattice form layers which are separated by a sublattice of BCO molecular rotors. By several magnetic measurements, we show that the subtle random potential of frozen BCO Brownian rotors suppresses magnetic order down to the lowest temperatures. Our study identifies the relevance of disorder in the stabilization of QSLs.
Permanent Link: http://hdl.handle.net/11104/0316269