caa a22 4500 445380241 CHVBK 20180317143015.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10948-010-1114-0 doi (NATIONALLICENCE)springer-10.1007/s10948-010-1114-0 Anomaly in the Complex Conductivity of Overdoped Y1− x Ca x Ba2Cu3O7− δ Thin Films from THz Spectroscopy [Elektronische Daten] [N. Bachar, E. Zhukova, B. Gorshunov, E. Farber, M. Roth] We measured the complex conductivity of Ca-doped YBCO thin films in the THz frequency range. The films were measured using both Time domain and Frequency domain methods for THz spectroscopy. We show that a subgap exists in the overdoped samples of 5% and 10% Ca doping. The subgap appears as a sharp decrease in the real part of conductivity at frequencies equivalent to gap energy of 1meV and is more prominent with increased doping. We suggest that this decrease in conductivity is related to a $d_{x^{2}-y^{2}}$-wave pairing symmetry with an imaginary part of is or id xy. The imaginary part of the conductivity shows the well-known 1/ω behavior, but its ωσ 2 product shows a dip in the spectrum at about ∼1meV. Springer Science+Business Media, LLC, 2010 Bachar N. Laboratory for Superconductivity and Optical Spectroscopy, Ariel University Center of Samaria, 40700, Ariel, Israel aut Zhukova E. Submillimeter Spectroscopy Department, Russian Academy of Sciences, Moscow, Russia aut Gorshunov B. Submillimeter Spectroscopy Department, Russian Academy of Sciences, Moscow, Russia aut Farber E. Laboratory for Superconductivity and Optical Spectroscopy, Ariel University Center of Samaria, 40700, Ariel, Israel aut Roth M. Department of Applied Physics, Hebrew University, Jerusalem, Israel aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/3(2011-04-01), 1225-1228 1557-1939 24:3<1225 2011 24 10948 https://doi.org/10.1007/s10948-010-1114-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-1114-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bachar N. Laboratory for Superconductivity and Optical Spectroscopy, Ariel University Center of Samaria, 40700, Ariel, Israel aut NATIONALLICENCE 700 1- Zhukova E. Submillimeter Spectroscopy Department, Russian Academy of Sciences, Moscow, Russia aut NATIONALLICENCE 700 1- Gorshunov B. Submillimeter Spectroscopy Department, Russian Academy of Sciences, Moscow, Russia aut NATIONALLICENCE 700 1- Farber E. Laboratory for Superconductivity and Optical Spectroscopy, Ariel University Center of Samaria, 40700, Ariel, Israel aut NATIONALLICENCE 700 1- Roth M. Department of Applied Physics, Hebrew University, Jerusalem, Israel aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/3(2011-04-01), 1225-1228 1557-1939 24:3<1225 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer