Observation of supercurrent distribution in YBa2Cu3O7-δ thin films using THz radiation excited with femtosecond laser pulses

被引：49

作者：

Shikii, S

Kondo, T

Yamashita, M

Tonouchi, M

Hangyo, M

Tani, M

Sakai, K

机构：

[1] Osaka Univ, Res Ctr Superconducting Mat & Elect, Osaka 5650871, Japan

[2] Kansai Adv Res Ctr, Commun Res Lab, Nishi Ku, Kobe, Hyogo 6512401, Japan

[3] Japan Sci & Technol Corp, CREST, Tokyo, Japan

来源：

APPLIED PHYSICS LETTERS | 1999年 / 74卷 / 09期

关键词：

D O I：

10.1063/1.123536

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have demonstrated that the supercurrent distribution in current-biased YBa2Cu3O7-delta thin films can be obtained by measuring the radiation power of THz electromagnetic pulses excited with femtosecond laser pulses. As the radiation power is proportional to the square of the bias current density at the laser spot position, the two-dimensional current distribution can be obtained from the intensity distribution of THz radiation by scanning the laser spot. The characteristic supercurrent distribution is analyzed by using the critical-state model. (C) 1999 American Institute of Physics. [S0003-6951(99)04609-4].

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页码：1317 / 1319

页数：3

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