NEUTRON-DIFFRACTION FROM THE VORTEX LATTICE IN THE HEAVY-FERMION SUPERCONDUCTOR UPT3

被引：64

作者：

KLEIMAN, RN

BROHOLM, C

AEPPLI, G

BUCHER, E

STUCHELI, N

BISHOP, DJ

CLAUSEN, KN

MORTENSEN, K

PEDERSEN, JS

HOWARD, B

机构：

[1] RISO NATL LAB,DK-4000 ROSKILDE,DENMARK

[2] CORNELL UNIV,ITHACA,NY 14853

[3] UNIV CONSTANCE,W-7750 CONSTANCE,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.69.3120

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have used neutron diffraction to observe the vortex lattice of UPt3. This is the first such measurement in a heavy-fermion system, a superconductor below 1 K, or in a system with such a long magnetic penetration depth (6000 +/- 75 angstrom). It also provides the first value for the pair coherence length, 111 +/- 2 angstrom, to be obtained directly within the pairing state of UPt3. The lattice is oblique hexagonal with conventional quantization. Its anisotropy can be explained by considering a combination of gap and Fermi-surface anisotropies. The lattice does not appear to change near the transitions between the superconducting phases identified by other techniques.

引用

页码：3120 / 3123

页数：4

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