MgB2 tunnel junctions and SQUIDs

被引：32
作者：
Brinkman, A.
Rowell, J. M.
机构：
[1] Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands
[2] Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands
[3] Arizona State Univ, Sch Mat, Tempe, AZ USA
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2007年 / 456卷 / 1-2期
关键词：
MgB2; tunnel junction; SQUID;
D O I：
10.1016/j.physc.2007.01.019
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Recent advances in the realization and understanding of MgB2 tunnel junctions and SQUIDs are surveyed. High quality MgB2 junctions with suitable tunnel barriers have been realized based on both oriented and epitaxial thin MgB2 films. Multiband transport properties, such as the existence of two energy gaps, phonon spectra and anisotropy have been investigated with these junctions. We review the suitability of different barrier materials and recent advances in obtaining reproducible all-MgB2 Josephson junctions for superconducting electronic circuitry. The development of epitaxial thin films has also led to high-quality multiband MgB2 SQUIDs and magnetometers that operate at high temperatures. The multiband nature of MgB2 provides new phenomena such as the Leggett mode. Manipulating the different phases of the condensates could lead to novel MgB2 devices with phase degrees of freedom. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：188 / 195
页数：8
相关论文
共 64 条
[41]   MgB2 thin films on silicon nitride substrates prepared by an in situ method [J].
Monticone, E ;
Gandini, C ;
Portesi, C ;
Rajteri, M ;
Bodoardo, S ;
Penazzi, N ;
Dellarocca, V ;
Gonnelli, RS .
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2004, 17 (04) :649-652
[42]   Superconductivity at 39 K in magnesium diboride [J].
Nagamatsu, J ;
Nakagawa, N ;
Muranaka, T ;
Zenitani, Y ;
Akimitsu, J .
NATURE, 2001, 410 (6824) :63-64
[43]   Evidence for a two-band behavior of MgB2 from point-contact and tunneling spectroscopy [J].
Ponomarev, YG ;
Kuzmicheva, SA ;
Mikheev, MG ;
Sudakova, MV ;
Tchesnokov, SN ;
Timergaleev, NZ ;
Yarigin, A ;
Maksimov, EG ;
Krasnosvobodtsev, SI ;
Varlashkin, A ;
Hein, MA ;
Müller, G ;
Piel, H ;
Sevastyanova, LG ;
Kravchenko, O ;
Burdina, KP ;
Bulychev, BM .
SOLID STATE COMMUNICATIONS, 2004, 129 (02) :85-89
[44]   MgB2 magnetometer with a directly coupled pick-up loop [J].
Portesi, C. ;
Mijatovic, D. ;
Veldhuis, D. ;
Brinkman, A. ;
Monticone, E. ;
Gonnelli, R. S. .
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2006, 19 (05) :S303-S306
[45]   Observation of the crossover from two-gap to single-gap superconductivity through specific heat measurements in neutron-irradiated MgB2 [J].
Putti, M ;
Affronte, M ;
Ferdeghini, C ;
Manfrinetti, P ;
Tarantini, C ;
Lehmann, E .
PHYSICAL REVIEW LETTERS, 2006, 96 (07)
[46]  
Rowell J, 2002, NAT MATER, V1, P5, DOI 10.1038/nmat713
[47]   The widely variable resistivity of MgB2 samples [J].
Rowell, JM .
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2003, 16 (06) :R17-R27
[48]   Fabrication of Josephson junctions with As-grown MgB2 thin films [J].
Saito, A ;
Kawakami, A ;
Shimakage, H ;
Terai, H ;
Wang, Z .
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2003, 13 (02) :1067-1070
[49]   In situ synthesis of MgB2 thin films for tunnel junctions [J].
Schneider, R ;
Geerk, J ;
Ratzel, F ;
Linker, G ;
Zaitsev, AG .
APPLIED PHYSICS LETTERS, 2004, 85 (22) :5290-5292
[50]   Effective action approach to the Leggett's mode in two-band superconductors [J].
Sharapov, SC ;
Gusynin, VP ;
Beck, H .
EUROPEAN PHYSICAL JOURNAL B, 2002, 30 (01) :45-51
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