Unusual magnetic fluctuations in the hidden order phase of Sr2(Ir,Rh)O4

ORAL

Abstract

Recently, hidden order was obseved by L. Zhao et al. in Rhodium doped Sr2IrO4 at temperature TΩ. As in the pseudogap phase of high Tc cuprates, this order breaks rotational symmetry and time reversal symmetry, while preserving translational symmetry. Using muon spin relaxation (MuSR) measurement, we found two types of dynamic magnetic order with different fluctuation rates in the hidden order phase of Sr2(Ir,Rh)O4. We also found that the higher fluctuating magnetic field generated by the order setting in at the higher temperature slows its fluctuation rate on exiting the hidden order at TΩ. A bump appears in the relaxation rate around TΩ. The TΩ obtained by the MuSR measurements are condistent with those determined by second harmonic generation and polarized neutron scattering.

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Presenters

  • Cheng Tan

    State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, China, Fudan University, State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China.

Authors

  • Cheng Tan

    State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, China, Fudan University, State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China.

  • Zhaofeng Ding

    State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, China, Fudan University, State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China.

  • Jian Zhang

    State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, China, Fudan University, State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China.

  • Lei Shu

    State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, China, Fudan University, Physics, Fudan University, State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China.