Berlin 2012 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 49: Correlated Electrons: Low-dimensional Systems - Materials 4

TT 49.6: Talk

Friday, March 30, 2012, 11:00–11:15, H 3005

Comparative study of spin orbit dominated iridates — •Mehmet Fatih Cetin¹, Peter Lemmens¹, Vladimir Gnezdilov², Dirk Wulferding¹, Tomohiro Takayama³, Kei Ohashi³, Hidenori Takagi^3,4, Kwang-Yong Choi⁵, and Chengtian Lin⁶ — ¹IPKM, TU-BS, Braunschweig, Germany — ²ILTPE NAS, Ukraine — ³AM, Univ. Tokyo, Japan — ⁴RIKEN, Japan — ⁵Dept. Phys., CA Univ., Seoul, Korea — ⁶MPI-FKF, Stuttgart, Germany

Raman spectroscopy is used to compare the effect of SOC on the excitation spectra in Sr₂IrO₄, Sr₃Ir₂O₇, and Na₄Ir₃O₈, which are reported to be spin liquids or anomalous Mott insulators. There is a decisive dynamics of the quasi particles and crossover phenomena related to an entanglement of electronic and lattice degrees of freedom. Work supported by DFG, B-IGSM and NTH School for Contacts in Nanosystems.