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Theoretical ideas and experimental results concerning high temperature superconductors are reviewed. Special emphasis is given to calculations carried out with the help of computers applied to models of strongly correlated electrons…

Condensed Matter · Physics 2009-10-22 Elbio Dagotto

Bi-based cuprate superconductors are important materials for both fundamental research and applications. As in other cuprates, the superconducting phase in the Bi compounds lies close to an antiferromagnetic phase. Our density functional…

Superconductivity · Physics 2020-07-07 J. Nokelainen , C. Lane , R. S. Markiewicz , B. Barbiellini , A. Pulkkinen , B. Singh , J. Sun , K. Pussi , A. Bansil

The current status of basic research on the high temperature cuprate superconductors and prospects for technological applications of these materials is discussed. Recent developments concerning other novel superconductors are also briefly…

Superconductivity · Physics 2009-10-31 M. Brian Maple

Discovery of high-temperature superconductivity (HTSC) in strongly correlated cuprates opened a new chapter in condensed matter physics, breaking existing stereotypes of what is a material base for a good superconductor ("Matthias rules"),…

Strongly Correlated Electrons · Physics 2024-03-05 Harald O. Jeschke , Makoto Shimizu , Igor I. Mazin

Coupling among conduction electrons (e.g. Zhang-Rice singlet) are often manifested in the core level spectra of exotic materials such as cuprate superconductors, manganites, etc. These states are believed to play key roles in the ground…

In this review, we present a summary of experimental studies of magnetism in Fe-based superconductors. The doping dependent phase diagram shows strong similarities to the generic phase diagram of the cuprates. Parent compounds exhibit…

Superconductivity · Physics 2010-05-19 M. D. Lumsden , A. D. Christianson

Understanding the extent and role of inhomogeneity is a pivotal challenge in the physics of cuprate superconductors. While it is known that structural and electronic inhomogeneity is prevalent in the cuprates, it has proven difficult to…

We analyze how the coherence peaks observed in Scanning Tunneling Spectroscopy (STS) of cuprate high temperature superconductors are transferred from the cuprate layer to the oxide layers adjacent to the STS microscope tip. For this…

Superconductivity · Physics 2015-05-20 Ilpo Suominen , Jouko Nieminen , R. S. Markiewicz , A. Bansil

The recent discovery of a new class of superconducting oxypnictides with high transition temperatures may have profound implications for understanding unconventional high-temperature superconductivity. Like the cuprates, the oxypnictides…

Materials aspects of cuprate high-temperature superconductors (HTS) are reviewed with respect to technical applications. The structural chemistry common to all HTS and their critical temperatures for the onset of superconductivity are…

Superconductivity · Physics 2007-05-23 Roland Hott

The high magnetic field phase diagram of the electron-doped infinite layer high-temperature superconducting (high-T_c) compound Sr_{0.9}La_{0.1}CuO_2 was probed by means of penetration depth and magnetization measurements in pulsed fields…

Superconductivity · Physics 2009-11-10 V. S. Zapf , N. -C. Yeh , A. D. Beyer , C. R. Hughes , C. H. Mielke , N. Harrison , M. S. Park , K. H. Kim , S. -I. Lee

At this centenary of the discovery of superconductivity, the design of new and more useful superconductors remains as enigmatic as ever. These materials play crucial roles both for fundamental science and applications, and they hold great…

Superconductivity · Physics 2011-10-20 Laura H. Greene , Hamood Z. Arham , Cassandra R. Hunt , Wan Kyu Park

We employed a machine-learning assisted approach to search for superconducting hydrides under ambient pressure within an extensive dataset comprising over 150 000 compounds. Our investigation yielded around 50 systems with transition…

Superconductivity · Physics 2024-03-21 Tiago F. T. Cerqueira , Yue-Wen Fang , Ion Errea , Antonio Sanna , Miguel A. L. Marques

Electronic Raman scattering with in and out of (ab) plane polarizations have been performed on HgBa2Ca2Cu3O8+d in a slightly underdoped single crystal with a critical temperature Tc=122 K. We find that the d-wave pairing gap at the…

Superconductivity · Physics 2015-08-27 B. Loret , A. Sacuto , D. Colson , Y. Gallais , M. Cazayous , M. -A. Méasson , A. Forget

Extensive ARPES and low-energy inelastic neutron scattering studies of cuprate superconductors can be successfully described using a weak-coupling theory in which quasiparticles on a square lattice interact via scalar and spin-dependent…

Strongly Correlated Electrons · Physics 2008-11-06 Wei-Cheng Lee , A. H. MacDonald

The thermal conductivity kappa of the quasi-two-dimensional (Q2D) organic superconductor lambda-(BETS)_2 GaCl_4 was studied in the magnetic field H applied parallel to the Q2D plane. The phase diagram determined from this bulk measurement…

Superconductivity · Physics 2009-11-07 M. A. Tanatar , T. Ishiguro , H. Tanaka , H. Kobayashi

We report high-resolution specific heat measurements on the quasi-2D organic superconductor $\kappa$-(BEDT-TTF)$_2$Cu(NCS)$_2$, performed by using a most sensitive ac-modulation technique. The main observations are (i) a discontinuity at…

Superconductivity · Physics 2009-11-07 J. Müller , M. Lang , R. Helfrich , F. Steglich , T. Sasaki

The parent compounds of the high-temperature cuprate superconductors are Mott insulators. It has been generally agreed that understanding the physics of the doped Mott insulators is essential to understanding the mechanism of high…

Large pulsed magnetic fields up to 60 Tesla are used to suppress the contribution of superconducting fluctuations (SCF) to the ab-plane conductivity above Tc in a series of YBa2Cu3O(6+x). These experiments allow us to determine the field…

Superconductivity · Physics 2012-05-08 F. Rullier-Albenque , H. Alloul

Here, we report an overview of the phase diagram of single layered and double layered Fe arsenide superconductors at high magnetic fields. Our systematic magnetotransport measurements of polycrystalline SmFeAsO$_{1-x}$F$_x$ at different…