On the low-temperature thermal properties and low-energy Fermi excitations in CeNiSn

Kikoin, K.; Visser, A. de; Bakker, K.; Takabatake, Toshiro

doi:10.1007/bf01307657

Cited by 8 publications

(25 citation statements)

References 30 publications

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“…The corresponding Cm/T versus T data are shown in on lines at the Fermi surface (V-shaped gap). The departure from this behaviour observed below T= 1.6 K for CeNiSn has been attributed to the onset of antiferromagnetic correlations [6]. The energy gap opens in the enhanced density of states as follows from the fairly large values for cm/T for T > T s. Extrapolating the Cm/T and Otm/T data as measured for T > Tg to T = 0 K, we obtain an enhanced electronic Grtineisen parameter of -19 for CeRhSb and CeNiSn (using a value for the isothermal compressibility of 1.8Mbar -~ as measured for CeNiSn [12]).…”

Section: Discussionmentioning

confidence: 95%

“…3. For comparison we also show the data for CeNiSn [6]. The corresponding Cm/T versus T data are shown in on lines at the Fermi surface (V-shaped gap).…”

Section: Discussionmentioning

confidence: 99%

“…In the case of an even number of valence electrons (where the felectron is counted as itinerant) an insulating ground state results. A more quantitative model for the Kondo insulating state, which is based on the interplay between the crystal field and spin excitations, has recently been formulated by Kagan and co-workers [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…In order to investigate the effect of the insulating state on the unit cell parameters, we recently reported a dilatometry study of CeNiSn [6]. The measurements performed on a single-crystalline sample showed a large anisotropy in the coefficients of linear thermal expansion (orthorhombic crystal structure), but the coefficient of volume expansion a v showed no specific 0921-4526/95/$09.50 © 1995 Elsevier Science B.V. All rights reserved SSDI 0921-4526(94)00597-4 structure upon opening of the gap.…”

Section: Introductionmentioning

confidence: 99%

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Thermal expansion of the Kondo insulator CeRhSb

Nolten

Visser

Kayzel

et al. 1995

Physica B: Condensed Matter

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Thermal expansion of the Kondo insulator CeRhSbNolten, A.J.; de Visser, A.; Kayzel, F.E.; Franse, J.J.M.; Tanaka, H.; Takabatake, T. Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. AbstractThe linear coefficients of thermal expansion, a(T), of the Kondo insulator CeRhSb and its non-f-electron analog LaRhSb have been measured on polycrystalline samples in the temperature range 1.5-200 K. After subtracting the phonon contribution (0 o = 260 K), the f-electron contribution to the thermal expansion, am(T), shows two distinct features, a broad maximum is centered at 125 K, while a large shoulder appears below 40 K. In a plot of t~., / T versus T, a maximum appears at the temperature where the energy gap opens, Tg = 10 K. For T < Tg, a.,(T) follows an aT + bT 2 law, which is compatible with a description of the energy gap vanishing on lines at the Fermi surface.

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Section: Discussionmentioning

confidence: 95%

“…3. For comparison we also show the data for CeNiSn [6]. The corresponding Cm/T versus T data are shown in on lines at the Fermi surface (V-shaped gap).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal expansion of the Kondo insulator CeRhSb

Nolten

Visser

Kayzel

et al. 1995

Physica B: Condensed Matter

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“…In an orthorhombic environment, the Kramer's doublets are generally described by a linear superposition of all three wave-functions 30,32 …”

Section: (L)mentioning

confidence: 99%

Theory of topological Kondo insulators

et al. 2012

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We examine how the properties of the Kondo insulators change when the symmetry of the underlying crystal field multiplets is taken into account. We employ the Anderson lattice model and consider its low-energy physics. We show that in a large class of crystal field configurations, Kondo insulators can develop a topological non-trivial ground-state. Such topological Kondo insulators are adiabatically connected to non-interacting insulators with unphysically large spin-orbit coupling, and as such may be regarded as interaction-driven topological insulators. We analyze the entanglement entropy of the Anderson lattice model of Kondo insulators by evaluating its entanglement spectrum. Our results for the entanglement spectrum are consistent with the surface state calculations. Lastly, we discuss the construction of the maximally localized Wannier wave functions for generic Kondo insulators.

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