ESR experiments on the Kondo insulator CeNiSn

Mair, S. L.; Nidda, H.-A. Krug von; Lohmann, M.; Loidl, A.

doi:10.1103/physrevb.60.16409

Cited by 14 publications

(6 citation statements)

References 24 publications

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“…This result means that the density of state losses at the Fermi surface and a gap opens at the temperature below T SDW . Such behavior of linewidth has been observed in the Kondo insulator CeNiSn 17 . The slope of linewidth exhibits an interesting behavior with the Co doping, and it shows a close relation with the characteristic temperature T SDW and T c .…”

supporting

confidence: 60%

Study of Electron Spin Resonance on single crystals $EuFe_{2-x}Co_{x}As_2$

Ying,

Wu,

Zheng

et al. 2009

Preprint

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The temperature dependence of electron spin resonance (ESR) was studied in EuF e2−xCoxAs2 (x = 0.0 ,0.067 ,0.1 ,0.2 ,0.25 ,0.285 ,0.35 ,0.4 and 0.5). The ESR spectrum of all the samples indicates that the g factor and peak-to-peak linewidth strongly depend on the temperature. Moreover, the peak-to-peak linewidth shows the Korringa behavior, indicating an exchange coupling between the conduction electrons and the Eu 2+ ions. The linewidth, g factor and the integrate ESR intensity show anomalies at the temperature of the spin-density-wave (SDW). The linewidth below the SDW transition does not rely on the temperature. This gives the evidence of the gap opening at the TSDW . The slope of the linewidth is closely associated to TSDW and TC. This exotic behavior may be related to the nesting of the Fermi surface.

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supporting

confidence: 60%

Study of Electron Spin Resonance on single crystals $EuFe_{2-x}Co_{x}As_2$

Ying,

Wu,

Zheng

et al. 2009

Preprint

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“…Such behavior of linewidth has been observed in the Kondo insulator CeNiSn. 19 The slope of linewidth exhibits an interesting behavior with Co doping, and it shows a close relation with T SDW and T c . Because the J Ss between the Eu 2+ and the conduction electrons does not change with Co doping, the difference of the slope should come from the density of state at Fermi surface.…”

mentioning

confidence: 84%

Electron spin resonance inEuFe2−xCoxAs2single crystals

Ying

Zheng

et al. 2010

Phys. Rev. B

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The temperature dependence of electron spin resonance ͑ESR͒ was studied in EuFe 2−x Co x As 2 system. The ESR spectrum of all the samples indicates that the linewidth strongly depends on the temperature. Moreover, the linewidth shows the Korringa behavior, indicating an exchange coupling between the conduction electrons and the Eu 2+ ions. The linewidth, g factor and the integrate ESR intensity show anomalies at the temperature of the spin-density-wave ͑SDW͒ ordering. The linewidth below the SDW transition does not rely on the temperature. This gives the evidence for the gap opening at the T SDW . The slope of the linewidth is closely associated to T SDW and T c . Such exotic behavior should be related to the nesting of the Fermi surface.

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“…Evidence for its opening at temperatures of the order of 10 K is, for example, derived from NMR measurements of the spin-lattice relaxation rate 1/T 1 , 7 from tunneling experiments, 8 and from measurements of the ESR linewidth. 9 Our main interest in the present work, however, con-cerns a potential residual DOS within the pseudogap, information on which may be obtained by measurements at very low temperatures only. NMR measurements of 1/T 1 vs T revealed a Korringa law, 10 and specific-heat measurements a linear temperature dependence, 11 both below approximately 500 mK.…”

Section: Introductionmentioning

confidence: 97%

Thermal-transport properties of CeNiSn

et al. 2000

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We present thermal-conductivity and thermopower S measurements on high-quality single crystalline CeNiSn along the three crystallographic axes a, b, and c in the temperature range between 100 mK and 7 K and in magnetic fields up to 8 T applied along the a axis. Both and S are highly anisotropic. However, characteristic features that may be attributed to the opening of a pseudogap in the electronic density of states ͑DOS͒ at the Fermi energy below 10 K are seen for all three crystallographic directions. These features are strongly suppressed by a magnetic field of 8 T applied along the a axis. At the lowest temperatures we have evidence for the presence of a residual metallic DOS at , again for all three directions. The saturation of the reduced Lorenz number L/L 0 to a value distinctly higher than one is an interesting feature which deserves further investigation.

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ESR experiments on the Kondo insulator CeNiSn

Cited by 14 publications

References 24 publications

Study of Electron Spin Resonance on single crystals $EuFe_{2-x}Co_{x}As_2$

Study of Electron Spin Resonance on single crystals $EuFe_{2-x}Co_{x}As_2$

Electron spin resonance inEuFe2−xCoxAs2single crystals

Thermal-transport properties of CeNiSn

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