Field-induced Bose-Einstein Condensation of triplons up to 8 K in Sr3Cr2O8 - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




Field-induced Bose-Einstein Condensation of triplons up to 8 K in Sr3Cr2O8 - Condensed Matter > Strongly Correlated Electrons - Download this document for free, or read online. Document in PDF available to download.

Abstract: Single crystals of the spin dimer system Sr3Cr2O8 have been grown for thefirst time. Magnetization, heat capacity, and magnetocaloric effect data up to65 T reveal magnetic order between applied fields of Hc1 ~ 30.4 T and Hc2 ~ 62T. This field-induced order persists up to ~ 8 K at H ~ 44 T, the highestobserved in any quantum magnet where Hc2 is experimentally-accessible. We fitthe temperature-field phase diagram boundary close to Hc1 using the expressionTc = AH-Hc1^v. The exponent v = 0.652, obtained at temperatures muchsmaller than 8 K, is that of the 3D Bose-Einstein condensate BEC universalityclass. This finding strongly suggests that Sr3Cr2O8 is a new realization of atriplon BEC where the universal regimes corresponding to both Hc1 and Hc2 areaccessible at He-4 temperatures.



Author: A.A. Aczel, Y. Kohama, C. Marcenat, F. Weickert, O.E. Ayala-Valenzuela, M. Jaime, R.D. McDonald, S.D. Selesnic, H.A. Dabkowska, G

Source: https://arxiv.org/







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