2017年
Design and preparation of a quantum spin liquid candidate κ-(ET)<inf>2</inf>Ag<inf>2</inf>(CN)<inf>3</inf> having a nearby superconductivity
Bulletin of the Chemical Society of Japan
- 巻
- 90
- 号
- 9
- 開始ページ
- 1073
- 終了ページ
- 1082
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1246/bcsj.20170167
- 出版者・発行元
- CHEMICAL SOC JAPAN
Similar to the first quantum spin liquid (QSL) candidate, kappa-(ET)(2)Cu-2(CN)(3) (1), newly prepared kappa-(ET)(2)Ag-2(CN)(3) (2) is a dimer Mott insulator with a QSL ground state at ambient pressure and exhibits metallic and superconducting states next to the QSL state under pressure, where ET is bis(ethylenedithio) tetrathiafulvalene. The packing of the ET dimer, which corresponds to a single spin site (S = 1/2), in 2 is similar to that in 1. Salt 2 afforded a two-dimensional equilateral triangular spin lattice having strong geometrical spin frustration (t'/t = 0.967) similar to 1 (t'/t = 1.09), where t and t' are the interdimer transfer interactions. The geometric relationship between the spin site and the opening in the anion layer in 2 is considerably different from that in 1, resulting in more dispersed packing of ET dimers, narrower bandwidth W, and larger on-site Coulomb repulsion energy U for 2 than 1. As a consequence, 2 has a higher electron correlation U/W, more robust QSL state for wider pressure range and is allocated far away from the itinerant region compared to those of 1. The narrower bandwidth is consistent with a higher superconducting critical temperature for 2 than 1 under pressure.
- リンク情報
-
- DOI
- https://doi.org/10.1246/bcsj.20170167
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000409895000002&DestApp=WOS_CPL
- Scopus Url
- http://www.scopus.com/inward/record.url?eid=2-s2.0-85029225986&partnerID=MN8TOARS
- ID情報
-
- DOI : 10.1246/bcsj.20170167
- ISSN : 0009-2673
- eISSN : 1348-0634
- ORCIDのPut Code : 71769948
- SCOPUS ID : 85029225986
- Web of Science ID : WOS:000409895000002