2D quantum spin-liquid candidate including a chiral anion: κ-(BEDT-TTF) 2 [B R/S (salicylate) 2 ]

Blundell, TJ, Sneade, K, Ogar, JO ORCID: https://orcid.org/0000-0002-2115-2885, Yamashita, S, Akutsu, H, Nakazawa, Y, Yamamoto, T and Martin, L ORCID: https://orcid.org/0000-0002-5330-5700, 2025. 2D quantum spin-liquid candidate including a chiral anion: κ-(BEDT-TTF) 2 [B R/S (salicylate) 2 ]. Journal of the American Chemical Society. ISSN 0002-7863

Preview

Text 2368923_Martin.pdf - Published version Download (4MB) | Preview

Abstract

The quantum spin-liquid state was first theorized by Anderson 50 years ago and the challenge remains to realize a quantum spin-liquid material. A handful of two-dimensional molecular candidates have attracted huge attention over the past 30 years owing to their triangular lattice possessing S = 1/2 spin systems. We present a new quantum spin-liquid candidate in 2D Mott insulator κ-(BEDT-TTF) 2 [B R/S (salicylate)] 2. The structure has a double-width anion layer giving it a strong 2D character. The spiroborate anion is chiral and the salt is an inversion twin, having no inversion symmetry center and crystallizing in space group P2 1. This offers the possibility of novel behavior owing to the low symmetry not previously seen in molecular spin-liquid candidates. The peak height of the 6K anomaly of κ-(BEDT-TTF) 2 [B R/S (salicylate) 2 ] is 2 or 3 times larger than that of κ-(BEDT-TTF) 2 Cu 2 (CN) 3 and EtMe 3 Sb[Pd(dmit) 2 ] 2. The structure presents many opportunities for crystal engineering through atom-by-atom changes to the ligands on the spiroborate anion to produce a family of materials which lie in and around the QSL region of the phase diagram for these salts. This gives the prospect of an experimental playground to deepen understanding of the QSL state. Electrical resistivity, SQUID magnetometry, band calculations, heat capacity, Infrared and Raman spectroscopy are reported for κ-(BEDT-TTF) 2 [B R/S (salicylate) 2 ].

Item Type:	Journal article
Publication Title:	Journal of the American Chemical Society
Creators:	Blundell, T.J., Sneade, K., Ogar, J.O., Yamashita, S., Akutsu, H., Nakazawa, Y., Yamamoto, T. and Martin, L.
Publisher:	American Chemical Society
Date:	6 February 2025
ISSN:	0002-7863
Identifiers:	Number Type 10.1021/jacs.4c12386 DOI 2368923 Other
Rights:	© 2025 The Authors. This article is licensed under CC-BY 4.0
Divisions:	Schools > School of Science and Technology
Record created by:	Jeremy Silvester
Date Added:	07 Feb 2025 16:03
Last Modified:	07 Feb 2025 16:03
URI:	https://irep.ntu.ac.uk/id/eprint/52988

Actions (login required)

Edit View

Statistics

Views

Downloads