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TT: Fachverband Tiefe Temperaturen
TT 2: SC: Properties, Electronic Structure, Mechanisms 1
TT 2.3: Talk
Monday, March 14, 2011, 11:00–11:15, HSZ 301
The energy scale in the cuprates: a Raman study — •B. Muschler1, N. Munnikes1, F. Venturini1, L. Tassini1, W. Prestel1, Shimpei Ono2, Yoichi Ando3, A. Damascelli4, D. Peets4, W.N. Hardy4,5, R. Liang4,5, D. Bonn4,5, H. Eisaki6, M. Greven7, A. Erb1, and R. Hackl1 — 1Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 2CRIEPI, Komae, Tokyo 201-8511, Japan — 3Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan — 4Department of Physics & Astronomy, University of British Columbia, Vancouver, BC V6T 1Z4, Canada — 5Canadian Institute for Advanced Research, Toronto M5G 1Z8, Canada — 6Nanoelectronic Research Institute, AIST, Tsukuba 305-8568, Japan — 7Department of Applied Physics and Photon Science, Stanford University, Stanford, CA 94305, USA
We present results of electronic Raman scattering experiments in single crystals of YBCO, Bi2212 and Tl2201 in the superconducting state. In B2g symmetry we find universal, material independent spectra with the pair breaking peak ΩpeakB2g scaling as 6 kBTc. ΩpeakB1g depends on the individual samples and may change by up to 30% for samples with the same Tc. On the average ΩpeakB1g decreases from 9 kBTc to 4.5 kBTc with the doping level increasing from p=0.15 to p=0.23. While the spectral weights of the B2g peaks are doping independent those in B1g increase by almost a factor of 10 from optimal to overdoped samples.
This work is supported by the DFG via FOR538 and SPP1458.