[23P-SF4A] Invited&Contributed

[23P-SF4A-02] Excitonic nature of magnons in a quantum Hall ferromagnet

*Preden Roulleau¹, Myunglae Jo¹, Geneviève Fleury¹, Heung-Sun Sim², Thierry Jolicoeur⁵, Takasi Taniguchi⁴, Patrice Roche¹, Christian Glattli¹, Norio Kumada³ (1. SPEC, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif sur Yvette Cedex France, 2. Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea, 3. NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi 243-0198, Japan, 4. National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, 5. IPHT, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif sur Yvette Cedex France)