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Electron-affinity difference distributions as an organizing principle for superconductivity, enabling the discovery of PtPbBi
Omri Lesser, Yanjun Liu, Natalie Maus +11
Predicting the superconducting transition temperature () from crystal structure and composition remains a central challenge in condensed-matter physics, reflecting the absence…
Chemical enhancement of superconductivity in LaRu3Si2 with mode-selective coupling between kagome phonons and flat bands
Ryo Misawa, Markus Kriener, Rinsuke Yamada +4
In kagome metals, flat electronic bands induced by frustrated hopping are a platform for strong electron correlations. In particular, a selective coupling of flat band states to ce…
PbCu(PO4)(OH): Phonon bands, Localized Flat Band Magnetism, Models, and Chemical Analysis
Yi Jiang, Scott B. Lee, Jonah Herzog-Arbeitman +12
In a series of recent reports, doped lead apatite (LK-99) has been proposed as a candidate ambient temperature and pressure superconductor. However, from both an experimental and t…
Eavesdropping on competing condensates by the edge supercurrent in a Weyl superconductor
Stephan Kim, Shiming Lei, Leslie M. Schoop +2
In a topological insulator the metallic surface states are easily distinguished from the insulating bulk states (FuKane07). By contrast, in a topological superconductor (FuKane08,Q…
Phase tuning of multiple Andreev reflections of Dirac fermions and the Josephson supercurrent in Al-MoTe2-Al junctions
Zheyi Zhu, Stephan Kim, Shiming Lei +3
When a normal metal is sandwiched between two superconductors, the energy gaps in the latter act as walls that confine electrons in in a square-well potential. If the volta…
Superconducting order parameter of the nodal-line semimetal NaAlSi
Lukas Muechler, Zurab Guguchia, Jean-Christophe Orain +4
Nodal-line semimetals are topologically non-trivial states of matter featuring band crossings along a closed curve, i.e. nodal-line, in momentum space. Through a detailed analysis…
Robustness of Yu-Shiba-Rusinov resonances in presence of a complex superconducting order parameter
Jacob Senkpiel, Carmen Rubio-Verdú, Markus Etzkorn +8
Robust quantum systems rely on having a protective environment with minimized relaxation channels. Superconducting gaps play an important role in the design of such environments. T…
Ir d-band Derived Superconductivity in the Lanthanum-Iridium System LaIr3
Neel Haldolaarachchige, Leslie Schoop, Mojammel A. Khan +4
The electronic properties of the heavy metal superconductor LaIr3 are reported. The estimated superconducting parameters obtained from physical properties measurements indicate tha…
Pressure effect on superconductivity in FeSe0.5Te0.5
Sergii I. Shylin, Vadim Ksenofontov, Pavel G. Naumov +8
Due to the simple layered structure, isostructural FeSe and FeSe0.5Te0.5 are clue compounds for understanding the principal mechanisms of superconductivity in the family of Fe-base…
Characterization of the Heavy Metal Pyrochlore Lattice Superconductor CaIr2
Neel Haldolaarachchige, Quinn Gibson, Leslie M. Schoop +2
We report the electronic properties of the cubic laves phase superconductor CaIr2 (Tc = 5.8 K), in which the Ir atoms have a Pyrochlore lattice. The estimated superconducting param…
Z topology and superconductivity from symmetry lowering of a 3D Dirac Metal AuPb
Leslie M. Schoop, Lilia S. Xie, Ru Chen +12
3D Dirac semi-metals (DSMs) are materials that have massless Dirac electrons and exhibit exotic physical properties It has been suggested that structurally distorting a DSM can cre…
Breakdown of Three-dimensional Dirac Semimetal State in pressurized Cd3As2
Shan Zhang, Qi Wu, Leslie Schoop +22
We report the first observation of a pressure-induced breakdown of the 3D-DSM state in Cd3As2, evidenced by a series of in-situ high-pressure synchrotron X-ray diffraction (XRD) an…
On the superconductivity of TiNCl and ZrNCl: A local bonding perspective
Lukas Muechler, Leslie M. Schoop, Claudia Felser
We analyze the superconductors TiNCl and ZrNCl from a local bonding perspective. Although TiNCl crystallizes in an orthorhombic structure and ZrNCl crystallizes in a hexagonal stru…
Superconductivity in the Cu(Ir1-xPtx)2Se4 Spinel
Huixia Luo, Tomasz Klimczuk, Lukas Muechler +5
We report the observation of superconductivity in the CuIr2Se4 spinel induced by partial substitution of Pt for Ir. The optimal doping level for superconductivity in Cu(Ir1-xPtx)2S…
Lone Pair Effect, Structural Distortions and Potential for Superconductivity in Tl Perovskites
Leslie M. Schoop, Lukas Müchler, Claudia Felser +1
Drawing the analogy to BaBiO3, we investigate via ab-initio electronic structure calculations potential new superconductors of the type ATlX3 with A = Rb, Cs and X = F, Cl, and Br,…
Interplay between Superconductivity and Magnetism in Rb0.8Fe1.6Se2 under Pressure
Vadim Ksenofontov, Sergey A. Medvedev, Leslie M. Schoop +6
High-pressure magnetization, structural and 57Fe Mössbauer studies were performed on superconducting Rb0.8Fe1.6Se2.0 with Tc = 32.4 K. The superconducting transition temperature gr…