Coexistence of the Kondo effect and spin glass physics in Fe-doped NbS$_2$
| Autor: | Y. Tabata, D. Sakabe, Hiroyoshi Nobukane, T. Kurosawa, Satoshi Tanda |
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| Rok vydání: | 2020 |
| Předmět: |
Spin glass
Magnetoresistance Kondo effect FOS: Physical sciences 02 engineering and technology spin glass 01 natural sciences Spectral line law.invention Condensed Matter - Strongly Correlated Electrons law Condensed Matter::Superconductivity 0103 physical sciences General Materials Science 010306 general physics Superconductivity Physics Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) transition metal dichalcogenides 021001 nanoscience & nanotechnology Condensed Matter Physics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Magnetic susceptibility Condensed Matter::Strongly Correlated Electrons Scanning tunneling microscope 0210 nano-technology Critical exponent |
| DOI: | 10.48550/arxiv.2001.07890 |
| Popis: | We report the coexistence of the Kondo effect and spin glass behavior in Fe-doped NbS$_2$ single crystals. The Fe$_x$NbS$_2$ shows the resistance minimum and negative magnetoresistance due to the Kondo effect, and exhibits no superconducting behavior at low temperatures. The resistance curve follows a numerical renormalization-group theory using the Kondo temperature $T_K =12.3$~K for $x=0.01$ as evidence of Kondo effect. Scanning tunneling microscope/spectroscopy (STM/STS) revealed the presence of Fe atoms near sulfur atoms and asymmetric spectra. The magnetic susceptibility exhibits a feature of spin glass. The static critical exponents determined by the universal scaling of the nonlinear part of the susceptibility suggest a three-dimensional Heisenberg spin glass. The doped-Fe atoms in the intra- and inter-layers revealed by the X-ray result can realize the coexistence of the Kondo effect and spin glass. |
| Databáze: | OpenAIRE |
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