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A review of UTeat high magnetic fields.
Rep Prog Phys
October 2023
NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, United States of America.
Uranium ditelluride (UTe) is recognized as a host material to unconventional spin-triplet superconductivity, but it also exhibits a wealth of additional unusual behavior at high magnetic fields. One of the most prominent signatures of the unconventional superconductivity is a large and anisotropic upper critical field that exceeds the paramagnetic limit. This superconductivity survives to 35 T and is bounded by a discontinuous magnetic transition, which itself is also field-direction-dependent.
View Article and Find Full Text PDFScalable Van der Waals Two-Dimensional PtTe Layers Integrated onto Silicon for Efficient Near-to-Mid Infrared Photodetection.
ACS Appl Mater Interfaces
April 2021
NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States.
In recent years, there has been increasing interest in leveraging two-dimensional (2D) van der Waals (vdW) crystals for infrared (IR) photodetection, exploiting their unusual optoelectrical properties. Some 2D vdW materials with small band gap energies such as graphene and black phosphorus have been explored as stand-alone IR responsive layers in photodetectors. However, the devices incorporating these IR-sensitive 2D layers often exhibited poor performances owing to their preparation issues such as limited scalability and air instability.
View Article and Find Full Text PDFLandau quantization and highly mobile fermions in an insulator.
Nature
January 2021
Department of Physics, Princeton University, Princeton, NJ, USA.
In strongly correlated materials, quasiparticle excitations can carry fractional quantum numbers. An intriguing possibility is the formation of fractionalized, charge-neutral fermions-for example, spinons and fermionic excitons-that result in neutral Fermi surfaces and Landau quantization in an insulator. Although previous experiments in quantum spin liquids, topological Kondo insulators and quantum Hall systems have hinted at charge-neutral Fermi surfaces, evidence for their existence remains inconclusive.
View Article and Find Full Text PDFEvidence for an edge supercurrent in the Weyl superconductor MoTe.
Science
May 2020
Department of Physics, Princeton University, Princeton, NJ 08544, USA.
Edge supercurrents in superconductors have long been an elusive target. Interest in them has reappeared in the context of topological superconductivity. We report evidence for the existence of a robust edge supercurrent in the Weyl superconductor molybdenum ditelluride (MoTe).
View Article and Find Full Text PDFWafer-Scale Growth of 2D PtTe with Layer Orientation Tunable High Electrical Conductivity and Superior Hydrophobicity.
ACS Appl Mater Interfaces
March 2020
NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States.
Platinum ditelluride (PtTe) is an emerging semimetallic two-dimensional (2D) transition-metal dichalcogenide (TMDC) crystal with intriguing band structures and unusual topological properties. Despite much devoted efforts, scalable and controllable synthesis of large-area 2D PtTe with well-defined layer orientation has not been established, leaving its projected structure-property relationship largely unclarified. Herein, we report a scalable low-temperature growth of 2D PtTe layers on an area greater than a few square centimeters by reacting Pt thin films of controlled thickness with vaporized tellurium at 400 °C.
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