Characteristic Features of the Mode Energy Estimated from Tunneling Conductance on TlBa^sub 2^Ca^sub 2^Cu^sub 3^O^sub 8.5+[Delta]

• Published in: Journal of the Physical Society of Japan Vol. 85; no. 2; p. 1
• Main Authors: Sekine, Ryotaro, Denholme, Saleem J, Tsukada, Akio, Kawashima, Susumu, Minematsu, Mitsumasa, Inose, Takashi, Mikusu, Satoshi, Tokiwa, Kazuyasu, Watanabe, Tsuneo, Miyakawa, Nobuaki
• Format: Journal Article
• Language: English
• Published: Tokyo The Physical Society of Japan 01-02-2016
• Subjects: Experiments; Scattering; Superconductivity; Temperature effects
• ISSN: 0031-9015; 1347-4073

We report the temperature dependence of tunneling conductance from 5 to 190 K for overdoped ... (Tl1223) withTC ~ 112 K. The tunneling conductances exhibit clear dips at a voltage, Vdip, below TC, suggesting that the dip is of superconducting origin. Moreover, we have found that the mode energy ... is 38 meV and independent of temperature, where ... is defined as the difference between eVdip and the superconducting gap ... In addition, the temperature dependence of the tunneling dip strength is similar to that of the magnetic resonance intensity at ... observed in inelastic neutron scattering experiments. We found that the relationship between the average mode energy ... and ... for Tl1223 is a common feature of ..., where ... increases with decreasing ..., but does not exceed 2. These characteristic features of the tunneling dips are consistent with not only those of resonance spin excitation but also pairing models in which the ... resonance is a collective spin excitation. (ProQuest: ... denotes formulae/symbols omitted.)