Berlin 2018 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 76: Topology: Other Topics
TT 76.5: Talk
Wednesday, March 14, 2018, 18:00–18:15, A 053
Shining a light on fractional excitations — •Dirk Wulferding1,2, Peter Lemmens1,2, Alexander Glamazda3, Vladimir Gnezdilov3, A.K. Bera4, A.T.M.N. Islam4, Bella Lake4, Seunghwan Do5, Youngsu Choi5, Vladimir Kurnosov3, Bodo Lobbenmeier1, and Kwang-Yong Choi5 — 1IPKM, TU-BS, Braunschweig, Germany — 2LENA, TU-BS, Braunschweig, Germany — 3ILTPE, NASU, Kharkov, Ukraine — 4Helmholtz-Zentrum Berlin, Germany — 5Chung-Ang Univ., Seoul, Korea
Quantum spin liquid ground states host exotic, fractional spinon or Majorana fermion excitations that are notoriously difficult to verify experimentally. Raman scattering is an alternative approach used on Kitaev-, Kagome-, and Haldane-chain materials [1,2,3,4,5] to provide spectroscopic fingerprints of fractional excitations.
Work supported by the Quantum- and Nanometrology initiative "QUANOMET" within Project NL-4, the NTH School "Contacts in Nanosystems", and the DFG Project LE967/16-1.
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Wulferding et al., PRB 82, 144412 (2010)