Electron tunneling using STM/STS on iron-based oxypnictides

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• 作者：Yuuki Kawashima ; Koichi Ichimura ; Toru Kurosawa ; Migaku Oda ; Satoshi T ; a ; Hiroki Takahashi ; Hironari Okada ; Yoichi Kamihara ; Hideo Hosono
• 关键词：STM/STS ; Iron-based superconductor ; Superconducting gap ; Pseudogap
• 刊名：Physica C
• 出版年：2010
• 出版时间：December 2010
• 年：2010
• 卷：470
• 期：Supplement 1
• 页码：S315-S316
• 全文大小：306 K

文摘

We report the electron tunneling study on SmFeAsO_1−xF_x (x = 0, 0.045, 0.046, 0.069) by using low temperature UHV-STM/STS. The superconducting gap and pseudogap structures are observed on x = 0.045, 0.046, 0.069. We also found similar structures on non-superconducting sample of x = 0. The value of 2Δ_sc/kT_c decreases as T_c increases.