Berezinskii-Kosterlitz-Thouless type scenario in the molecular spin liquid ACr2 O4(A=Mg,Zn,Cd)
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HEMMIDA, Mamoun; KRUG VON NIDDA, Hans Albrecht; TSURKAN, Vladimir; LOIDL, Alois. Berezinskii-Kosterlitz-Thouless type scenario in the molecular spin liquid ACr2 O4(A=Mg,Zn,Cd). In: Physical Review B. 2017, nr. 22(95), p. 0. ISSN -.
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Physical Review B
Numărul 22(95) / 2017 / ISSN - /ISSNe 0163-1829

Berezinskii-Kosterlitz-Thouless type scenario in the molecular spin liquid ACr2 O4(A=Mg,Zn,Cd)


DOI: 10.1103/PhysRevB.95.224101
Pag. 0-0

Hemmida Mamoun1, Krug Von Nidda Hans Albrecht1, Tsurkan Vladimir12, Loidl Alois1
 
1 University of Augsburg,
2 Institute of Applied Physics, Academy of Sciences of Moldova
 
Disponibil în IBN: 19 februarie 2018


Rezumat

The spin relaxation in chromium spinel oxides ACr2O4 (A= Mg, Zn, Cd) is investigated in the paramagnetic regime by electron spin resonance (ESR). The temperature dependence of the ESR linewidth indicates an unconventional spin-relaxation behavior, similar to spin-spin relaxation in the two-dimensional (2D) chromium-oxide triangular lattice antiferromagnets. The data can be described in terms of a generalized Berezinskii-Kosterlitz-Thouless (BKT) type scenario for 2D systems with additional internal symmetries. Based on the characteristic exponents obtained from the evaluation of the ESR linewidth, short-range order with a hidden internal symmetry is suggested.