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Magnetic Doping Induced Superconductivity-to-Incommensurate Density Waves Transition in a 2D Ultrathin Cr-Doped MoC Crystal.
ACS Nano
September 2021
School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.
In the vicinity of a competing electronic order, superconductivity emerges within a superconducting dome in the phase diagram, which has been demonstrated in unconventional superconductors and transition-metal dichalcogenides (TMDs), suggesting a scenario where fluctuations or a partial melting of a parent order are essential for inducing superconductivity. Here, we present a contrary example, the two-dimensional (2D) superconductivity in transition-metal carbide can be readily turned into charge density wave (CDW) phases via dilute magnetic doping. Low temperature scanning tunneling microscopy/spectroscopy (STM/STS), transport measurements, and density functional theory (DFT) calculations were employed to investigate Cr-doped superconducting MoC crystals in the 2D limit.
View Article and Find Full Text PDFPhase transitions and magnetic structures in MnW1-x Mo x O4 compounds (x ⩽ 0.2).
J Phys Condens Matter
August 2016
Laboratoire CRISMAT, CNRS ENSICAEN UMR6508, 6 Bd Maréchal Juin, F-14050 Caen cedex 4, France.
Temperature-dependent specific heat, magnetization and neutron diffraction data have been collected in zero magnetic field for polycrystalline samples of MnW1-x Mo x O4 (x ⩽ 0.2) solid solution whose end-member MnWO4 exhibits a magnetoelectric multiferroic phase (AF2 phase) between T 1 ≈ 8 K and T 2 = 12.5 K.
View Article and Find Full Text PDFIn situ photoemission study of Pr1-xCaxMnO3 epitaxial thin films with suppressed charge fluctuations.
Phys Rev Lett
January 2008
Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan.
We have performed an in situ photoemission study of Pr1-xCaxMnO3 (PCMO) thin films grown on LaAlO3 (001) substrates and observed the effect of epitaxial strain on the electronic structure. We found that the chemical potential shifted monotonically with doping, unlike bulk PCMO, implying the disappearance of incommensurate charge fluctuations of bulk PCMO. In the valence-band spectra, we found a doping-induced energy shift toward the Fermi level (EF) but there was no spectral weight transfer, which was observed in bulk PCMO.
View Article and Find Full Text PDFDoping-induced incommensurate antiferromagnetism in a Mott-Hubbard insulator.
Phys Rev B Condens Matter
October 1991
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