RT Journal Article
T1 Low-temperature spin excitations in frustrated ZnCr2O4 probed by high-field thermal conductivity
A1 Zhou, Haidong
A1 Zhao, Z. Y.
A1 Sun, X. F.
A1 Nieto Suárez, Marina
A1 Rivas Murias, Beatriz
A1 Tsurkan, Vladimir
A1 Deisenhofer, Joachim
A1 Zapf, Vivien
A1 Rivadulla Fernández, José Francisco
AB The magnetoelastic excitations of spin frustrated ZnCr2O4 are studied by the magnetic field dependence of the thermal conductivity k down to 50 mK. Above the first-order magnetostructural transition at TN,S≈ 12.5 K, spin fluctuations are strongly coupled to acoustic phonons, leading to a glasslike dependence of k(T), up to Θ CW. In the symmetry broken phase below TN,S, k shows a dominant magnetic contribution even at the lowest temperatures probed in this work. Application of a magnetic field above 2.5 T destabilizes the spin-bond structure, leading to a sudden increase and a nonconventional temperature dependence of the thermal conductivity. The possibility of the coexistence of gapped and gapless excitations in this magnetic phase is discussed
PB APS Physics
SN 2469-9950
YR 2013
FD 2013
LK http://hdl.handle.net/10347/17036
UL http://hdl.handle.net/10347/17036
LA eng
NO Zhou, H., Zhao, Z., Sun, X., Nieto Suarez, M., Rivas-Murias, B., & Tsurkan, V. et al. (2013). Low-temperature spin excitations in frustrated ZnCr2O4probed by high-field thermal conductivity. Physical Review B, 87(17). doi: 10.1103/physrevb.87.174436
NO This work was partially supported by MAT2010-16157 (Ministerio de Economía y Competitividad, Spain) and by the DFG via TRR 80 (Augsburg-Munich). Z.Y.Z. and X.F.S. acknowledge support from the National Natural Science Foundation of China, the National Basic Research Program of China (Grant Nos. 2009CB929502 and 2011CBA00111), and the Fundamental Research Funds for the Central Universities (Program No. WK2340000035). V.Z. acknowledges Los Alamos National Lab Directed Research Project 2010000043DR
DS Minerva
RD 28 abr 2026