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Superconductive Coupling Effects in Selectively Grown Topological Insulator-Based Three-Terminal Junctions.
ACS Nano
January 2025
Peter Grünberg Institut (PGI-9), Forschungszentrum Jülich, 52425 Jülich, Germany.
The combination of an ordinary s-type superconductor with three-dimensional topological insulators creates a promising platform for fault-tolerant topological quantum computing circuits based on Majorana braiding. The backbone of the braiding mechanism are three-terminal Josephson junctions. It is crucial to understand the transport in these devices for further use in quantum computing applications.
View Article and Find Full Text PDFThe Effect of Infiltration Temperature on the Microstructure and Magnetic Levitation Force of Single-Domain YBaCuO Bulk Superconductors Grown by a Modified Y+011 IG Method.
Nanomaterials (Basel)
December 2024
School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
During the preparation of single-domain (S-D) REBaCuO (RE-123) superconducting bulks, the seed crystals can serve as templates for crystal growth, guiding the newly formed crystals to grow in a specific direction, thereby ensuring the consistency of the crystal orientation within the sample. However, the infiltration temperature is typically restricted to approximately 1050 °C when employing NdBaCuO (Nd-123) crystal seeds in the traditional top-seeded infiltration growth (TSIG) technique for producing single-domain Y-123 bulk superconductors. In the present study, to overcome the temperature limitations of the heat treatment process, the optimized YO +011 IG (011 refers to BaCuO powder) method was employed to fabricate a group of single-domain Y-123 bulks with a high-temperature infiltration (1000-1300 °C).
View Article and Find Full Text PDFSuperconducting critical temperature elevated by intense magnetic fields.
Proc Natl Acad Sci U S A
January 2025
Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, United Kingdom.
Below a critical temperature [Formula: see text], superconductors transport electrical charge without dissipative energy losses. The application of a magnetic field [Formula: see text] generally acts to suppress [Formula: see text], up to some critical field strength at which [Formula: see text] 0 K. Here, we investigate magnetic field-induced superconductivity in high-quality specimens of the triplet superconductor candidate UTe[Formula: see text] in pulsed magnetic fields up to [Formula: see text] [Formula: see text] 70 T.
View Article and Find Full Text PDFThickness-dependent polaron crossover in tellurene.
Sci Adv
January 2025
Department of Electrical and Computer Engineering and the Rice Advanced Materials Institute, Rice University, Houston, TX 77005, USA.
Polarons, quasiparticles from electron-phonon coupling, are crucial for material properties including high-temperature superconductivity and colossal magnetoresistance. However, scarce studies have investigated polaron formation in low-dimensional materials with phonon polarity and electronic structure transitions. In this work, we studied polarons of tellurene, composed of chiral Te chains.
View Article and Find Full Text PDFReducing Disorder in PbTe Nanowires for Majorana Research.
Nano Lett
January 2025
State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China.
Material challenges are the key issue in Majorana research, where surface disorder constrains device performance. Here, we tackle this challenge by embedding PbTe nanowires within a lattice-constant-matched crystal. The wire edges are shaped by self-organized growth instead of lithography, resulting in nearly atomically flat facets along both cross-sectional and longitudinal directions.
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