Quasiparticle states of high-Tc oxides observed by a Zeeman magnetic field response

被引：0

作者：

Kashiwaya, S ^{[1
]}

Kashiwaya, H ^{[1
]}

Prijamboedi, B ^{[1
]}

Sugimoto, A ^{[1
]}

Kurosawa, I ^{[1
]}

Ikeda, K ^{[1
]}

Tanaka, Y ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Nanoelect Res Inst, Tsukuba, Ibaraki 3058568, Japan

来源：

Realizing Controllable Quantum States: MESOSCOPIC SUPERCONDUCTIVITY AND SPINTRONICS | 2005年

关键词：

D O I：

10.1142/9789812701619_0028

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Spin polaxized tunneling spectroscopy was applied to optimally doped YBa2Cu3O7-delta (YBCO) in order to detect the quasiparticle properties of d-wave superconducting phase. YBCO/La0.67Sr0.33MnO3 junctions were fabricated by PLD and photolithographic process and a Zeeman magnetic field was applied to the direction parallel to the ab-plane. Expected Zeeman splitting of conductance spectrum was not detected for the field up to 14T. Instead, unpredictably large gap suppression due to the applied field was observed. Since both of these responses are inconsistent with weak coupling BCS model which takes into account of d-wave symmetry, the present results reflect the anomalous quasiparticle states in high-T-c oxides.

引用

页码：179 / 184

页数：6

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