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This review paper illustrates the main normal and superconducting state properties of magnesium diboride, a material known since early 1950's, but recently discovered to be superconductive at a remarkably high critical temperature Tc=40K…

Superconductivity · Physics 2007-05-23 Cristina Buzea , Tsutomu Yamashita

The new iron based high Tc superconductors with Tc up to 55 K have stirred new interest in this field. It is consensus that the BCS mechanism is not able to explain the high Tc's. In the following we propose that spin holes in…

Superconductivity · Physics 2008-06-06 P. Wachter

The iron-based superconductor (IBS) single pancake coil (SPC) with 30 mm inner diameter was firstly fabricated and tested under 24 T background field. This SPC was successfully made using the 7-filamentary Ba1-xKxFe2As2 (Ba122) tape by…

We report the synthesis and physical properties of the single crystals of TaC, which are proposed to hold topological band structure as a topological superconductor (TSC) candidate. Magnetization, resistivity and specific heat measurements…

Superconductivity · Physics 2021-02-04 D. Yu. Yan , M. Yang , C. X. Wang , P. B. Song , C. J. Yi , Y. G. Shi

A trapped field of over 1 T at 5 K and 0.5 T at 20 K has been measured between a stack of magnetized cylinders of bulk polycrystalline Ba0.6K0.4Fe2As2 superconductors 10 mm in diameter and 18 mm in combined thickness. The trapped field…

The cubic A15 structure metals, with over 60 distinct member compounds, held the crown of highest Tc superconductor starting in 1954 with the discovery of Tc=18 K in Nb3Sn. Tc increased over the next 20 years until the discovery in 1973 of…

Superconductivity · Physics 2015-05-26 G. R. Stewart

Fe-based superconductors were discovered in 2008. This discovery with T$_c$ values up to 56 K, generated a new belief in the field of superconductivity. Till its discovery, high temperature superconductivity in cuprates, created a prejudice…

Superconductivity · Physics 2014-08-15 Haranath Ghosh , Smritijit Sen

Iron-based superconductors were discovered seven years ago, in 2008. This short review summarizes what we learned about these materials over the last seven years, what are open questions, and what new physics we expect to extract from…

Superconductivity · Physics 2023-07-19 Andrey V. Chubukov , P. J. Hirschfeld

The discovery of cuprate high Tc superconductors has inspired searching for unconventional su- perconductors in magnetic materials. A successful recipe has been to suppress long-range order in a magnetic parent compound by doping or high…

Superconductivity · Physics 2015-03-18 Wei Bao , Q. Huang , G. F. Chen , M. A. Green , D. M. Wang , J. B. He , X. Q. Wang , Y. Qiu

Iron-based superconductors, with Tc values up to 55 K, are of great interest for applications, due to their lower anisotropies and ultrahigh upper critical fields. In the past 4 years, great progress has been made in the fabrication of…

Superconductivity · Physics 2015-06-12 Yanwei Ma

We establish quasi-two-dimensional thin films of iron-based superconductors (FeSCs) as a new high-temperature platform for hosting intrinsic time-reversal-invariant helical topological superconductivity (TSC). Based on the combination of…

Superconductivity · Physics 2021-04-13 Rui-Xing Zhang , S. Das Sarma

Up to now, there have been two material families, the cuprates and the iron-based compounds with high-temperature superconductivity (HTSC). An essential open question is whether the two classes of materials share the same essential physics.…

Superconductivity · Physics 2011-04-20 Minghu Fang , Hangdong Wang , Chiheng Dong , Zujuan Li , Chunmu Feng , Jian Chen , H. Q. Yuan

Here we report the discovery of superconductivity in multiple phases of the compressed GeSb2Te4 (GST) phase change memory alloy, which has attracted considerable attention for the last decade due to its unusual physical properties with many…

The increase of energy in accelerators over the past decades has led to the design of superconducting magnets for both accelerators and the associated detectors. The use of Nb-Ti superconducting materials allows an increase in the dipole…

Accelerator Physics · Physics 2015-01-29 P Védrine

The high upper critical field and low anisotropy of iron-based superconductors make them being particularly attractive for high-field applications. However, the current carrying capability needs to be enhanced by overcoming the weak-link…

Superconductivity · Physics 2018-01-24 He Huang , Chao Yao , Chiheng Dong , Xianping Zhang , Dongliang Wang , Zhe Cheng , Jianqi Li , Satoshi Awaji , Yanwei Ma

Scanning tunneling microscopy (STM) has made tremendous progress in the study and understanding of both classical and unconventional superconductors. This has motivated a rapidly growing effort to apply the same techniques to the iron-based…

Superconductivity · Physics 2013-07-29 Can-Li Song , Jennifer E. Hoffman

The discovery of superconductivity at 39 K in magnesium diboride offers the possibility of a new class of low-cost, high-performance superconducting materials for magnets and electronic applications. With twice the critical temperature of…

Progress in superconducting device and detector technologies over the past decade have realized practical applications in quantum computers, detectors for far-infrared telescopes, and optical communications. Superconducting thin film…

Rare Earth Barium Copper Oxide (REBCO) coated conductors (CCs) have emerged for future high field magnets in fields and temperatures inaccessible for Nb based superconductors. However, their exceptionally high current densities pose…

The concept of interface superconductivity was introduced over 50 years ago. Some of the greatest physicists of that time wondered whether a quasi-two-dimensional (2D) superconductor can actually exist, what are the peculiarities of 2D…

Superconductivity · Physics 2011-11-18 Juan Pereiro , Alexander Petrovic , Christos Panagopoulos , Ivan Božović