Anomalous magnetic-field tunneling of YBa2Cu3O7-δ junctions:: Possible detection of non-Fermi-liquid states -: art. no. 094501

被引：21

作者：

Kashiwaya, H

Kashiwaya, S

Prijamboedi, B

Sawa, A

Kurosawa, I

Tanaka, Y

Iguchi, I

机构：

[1] Natl Inst Adv Ind Sci & Technl, Nanoelectr Res Inst, Tsukuba, Ibaraki 3058568, Japan

[2] Japan Womens Univ, Bunkyo Ku, Tokyo 1128681, Japan

[3] AIST, Correlated Elect Res Ctr, Tsukuba, Ibaraki 3058562, Japan

[4] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

[5] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.70.094501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic-field tunneling spectroscopy was applied to optimally doped YBa2Cu3O7-delta (YBCO) to detect the quasiparticle properties in the superconducting phase. Three types of epitaxial YBCO/La0.67Sr0.33MnO3 junctions with different orientations were fabricated, and the responses of conductance spectra to an applied parallel magnetic field were measured at below 1 K. The measured conductance spectra showed neither splitting nor broadening with muV resolution. This result apparently contradicts the model based on the weak coupling theory. One possibility for this contradiction is the breakdown of the superconducting Fermi-liquid in optimally doped YBCO.

引用

页码：094501 / 1

页数：5

共 30 条

[1] DYNAMIC PHENOMENA IN SUPERCONDUCTING OXIDES MEASURED BY ESR [J].