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Electronic diffusion in a normal state of high-Tc cuprate YBaCuO.
Proc Natl Acad Sci U S A
March 2024
Department of Theoretical Physics, Jožef Stefan Institute, Ljubljana 1000, Slovenia.
The bad metallic phase with resistivity above the Mott-Ioffe-Regel (MIR) limit, which appears also in cuprate superconductors, was recently understood by cold atom and computer simulations of the Hubbard model via charge susceptibility and charge diffusion constant. However, since reliable simulations can be typically done only at temperatures above the experimental temperatures, the question for cuprate superconductors is still open. This paper addresses this question by resorting to heat transport, which allows for the estimate of electronic diffusion and it further combines it with the resistivity to estimate the charge susceptibility.
View Article and Find Full Text PDFMagnetotransport and Fermi surface segmentation in Pauli limited superconductors.
J Phys Condens Matter
January 2024
Department of Physics and Nanotechnology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, India.
We report the first theoretical investigation of the spectroscopic, electrical and optical transport signatures of-wave Pauli limited superconductors, based on a non perturbative numerical approach. We demonstrate that the high magnetic field low temperature regime of these materials host a finite momentum paired superconducting phase. Multi-branched dispersion spectra with finite energy superconducting gaps, anisotropic segmentation of the Fermi surface and spatial modulations of the superconducting order characterizes this finite momentum paired phase and should be readily accessible through angle resolved photo emission spectroscopy, quasiparticle interference and differential conductance measurements.
View Article and Find Full Text PDF^{138}Ba(d,α) Study of States in ^{136}Cs: Implications for New Physics Searches with Xenon Detectors.
Phys Rev Lett
August 2023
Fakultät für Physik, Ludwig-Maximilians-Universität München, D-85748 Garching, Germany.
We used the ^{138}Ba(d,α) reaction to carry out an in-depth study of states in ^{136}Cs, up to around 2.5 MeV. In this Letter, we place emphasis on hitherto unobserved states below the first 1^{+} level, which are important in the context of solar neutrino and fermionic dark matter (FDM) detection in large-scale xenon-based experiments.
View Article and Find Full Text PDFStructural Properties and Hopping Conduction in the Normal State of Electron-Doped Superconductor Cuprate Eu Ce CuO.
ACS Omega
April 2022
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang Km. 21, Sumedang 45363, West Java, Indonesia.
Electron-doped superconducting cuprate of Eu Ce CuO has been studied in the whole doping regime from = 0.10-0.20 with reducing oxygen content to investigate the relation between the crystal structure and the hopping conduction in the normal state.
View Article and Find Full Text PDFColossal Magnetoresistance in Ti Lightly Doped CrSe Single Crystals with a Layered Structure.
ACS Appl Mater Interfaces
December 2021
School of Materials Science and Engineering and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China.
Article Synopsis
- Stoichiometric CrSe single crystals are unique antiferromagnets characterized by noncollinear spin configurations and moderate magnetoresistance, with poor metallic conductivity below a certain temperature.
- Doping these crystals with 1.5 atomic percent titanium leads to a huge increase in magnetoresistance (over 16,000%), which is significantly higher than that of undoped CrSe, and is linked to the altered spin configuration.
- This titanium doping transforms CrSe from metallic to semiconducting behavior, changes its magnetic anisotropy, and suggests potential applications in spintronic devices due to the impressive magnetoresistance properties.
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