Coexistence of the Kondo effect and spin glass physics in Fe-doped NbS2

被引：10
作者：
Nobukane, H. [1 ,2 ]
Tabata, Y. [1 ]
Kurosawa, T. [1 ,2 ]
Sakabe, D. [3 ]
Tanda, S. [2 ,3 ]
机构：
[1] Hokkaido Univ, Dept Phys, Sapporo, Hokkaido 0600810, Japan
[2] Hokkaido Univ, Ctr Educ & Res Topol Sci & Technol, Sapporo, Hokkaido 0608628, Japan
[3] Hokkaido Univ, Dept Appl Phys, Sapporo, Hokkaido 0608628, Japan
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2020年 / 32卷 / 16期
关键词：
Kondo effect; spin glass; transition metal dichalcogenides; CHARGE-DENSITY-WAVE; SUPERCONDUCTIVITY; COMPETITION; TRANSITION; BEHAVIOR; LATTICE; ORDER; MODEL;
D O I：
10.1088/1361-648X/ab622a
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report the coexistence of the Kondo effect and spin glass behavior in Fe-doped NbS2 single crystals. The FexNbS2 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 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.
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页数：7
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