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TT: Fachverband Tiefe Temperaturen

TT 3: Superconductivity: Properties and Electronic Structure I

TT 3.9: Vortrag

Montag, 12. März 2018, 11:45–12:00, H 0110

Is there a relation between T_c,max and the superexchange strength J? — •Silvia Müllner¹, Dirk Wulferding^1,2, Peter Lemmens^1,2, Meny Shay³, Gil Drachuck³, Wayne Crump⁴, Jeff Tallon⁴, and Amit Keren³ — ¹IPKM, TU-BS, Braunschweig, Germany — ²LENA, TU-BS, Braunschweig, Germany — ³Phys. Dep., Technion Haifa, Israel — ⁴RRI, Victoria Univ., New Zealand

Using Raman scattering the magnetic superexchange strength J can be directly determined via two-magnon scattering. Two earlier Raman scattering investigations on HTSC have shown contradicting relations between J and T_c,max. We present new Raman scattering results of various RE123 HTSC with different J and their relation with T_c,max. Work supported by GIF 1171-486 189.14/2011.
Wulferding, et al., PRB 90, 104511 (2014).
Tallon, PRB 90, 214523 (2014).
Ellis, et al., PRB 92, 104507 (2015).