期刊
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
卷 388, 期 -, 页码 573-574出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0921-4534(02)02746-6
关键词
tunneling spectroscopy; superconducting gap; break junction; Li-0.48(THF)(0.3)HfNCl
Tunneling measurements on the electron-doped layered superconductor Li-0.48(THF)(0.3)HfNCl(THF;C4H8O) with T-c = 25.5 K have been carried out. Since the surface of this compound is very reactive, we have employed in situ break junction to obtain unaffected interface. The result shows the gap value of 2Delta = 9-12 meV, which leads to the strong-coupling gap ratio 2Delta/k(B)T(c) similar or equal to 5. This is the largest value among non-cuprate superconductors. (C) 2003 Elsevier Science B.V. All rights reserved.
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