Посилання:Observation of new magnetic ground state in frustrated quantum antiferromagnet spin-liquid system Cs₂CuCl₄ / Hyeong-Jin Kim, C.R.S. Haines, C. Liu, Sae Hwan Chun, Kee Hoon Kim, H.T. Yi, Sang-Wook Cheong, Siddharth S. Saxena // Физика низких температур. — 2017. — Т. 43, № 8. — С. 1126-1130. — Бібліогр.: 27 назв. — англ.
Підтримка:We would like to thank D. Y. Kim, G. G. Lonzarich, Victor Eremenko, Valentyna Sirenko, S. E. Rowley, P. Nahai Williamson, C. J. Pickard, Patricia L. Alireza, Swee K. Goh, and S. E. Dutton for useful discussions. We acknowledge support from KAZATOMPROM Kazakhstan, EPSRC and Jesus College, Cambridge. The work at SNU was supported by National Creative Research Initiative (2010–10018300). Work at Rutgers is funded by the Gordon and Betty Moor Foundation's EPiQS Initiative through Grant No. GBMF4413 to the Rutgers Center for Emergent Materials. We thank CamCool Research Ltd. for providing the pressure cells used in this work.
Cs₂CuCl₄ is known to possess a quantum spin-liquid phase with antiferromagnetic interaction below 2.8 K. We report the observation of a new metastable magnetic phase of the triangular frustrated quantum spin system Cs₂CuCl₄ induced by the application of hydrostatic pressure. We measured the magnetic properties of Cs₂CuCl₄ following the application and release of pressure after 3 days. We observed a previously unknown ordered magnetic phase with a transition temperature of 9 K. Furthermore, the recovered sample with new magnetic ground state possesses an equivalent crystal structure to the uncompressed one with antiferromagnetic quantum spinliquid phase.