dHvA Effect Study of Metamagnetic Transition in CeRu₂Si₂II - The State above the Metamagnetic Transition

High-field magnetization of the 3d heavy-fermion system LiV2O4 ( 0, 0.08)

“…Similar change in the magnetic response has also been observed in CeCu 6 [24]. Furthermore, the de Haas-van Alphen effect measurements on CeRu 2 Si 2 have revealed the change in its Fermi surface from itinerant at low fields to almost localized f -electrons at high fields [25]. Hence, the high-field states in these compounds are well described by localized f -electrons with single-site Kondo fluctuations.…”

Change of Fermi Surface Topology in CeRu2Si2 Studied by LSDA+U Method

“…10,11) The cyclotron effective masses also increase considerably around H m , [12][13][14] then the dHvA frequencies change abruptly at the critical magnetic field. Meanwhile, low-temperature magnetization measurements have confirmed that CeRu 2 Si 2 possess a finite crossover temperature to the Fermi-liquid ground state at H $ H m , 15) and a recent magnetoresistance measurements also show the absence of a discontinuity at the metamagnetic transition or hysteresis at the metamagnetic transition.…”

“…Meanwhile, the dHvA frequencies above H m can be explained well with the localized f electron picture, because of the similarity to the dHvA frequencies of LaRu 2 Si 2 . 11,12,14) Therefore, so far the electronic structure after the metamagnetic transition has been studied by treating the Ce-4f electrons as localized. 19) There has been no study based on an electronic structure calculation with treating the magnetic Ce-4f state for CeRu 2 Si 2 .…”

Electronic structure ofCeRu2X2(X=Si,Yano1, Sekiyama2, Fujiwara3 et al. 2008Phys. Rev. B515210View full textAdd to dashboardCite

“…However, the dHvA results of CeRu 2 Si 2 can not fully be explained by the band structure calculations under H < H m . 18 For example, the heaviest effective mass FS or the smallest FS signals have not been observed along the magnetic field direction of < 001 >. Recently, another experimental method named "soft X-ray hν-dependent angleresolved photoelectron spectroscopy (ARPES)" has been established to determine three-dimensional (3D) FSs by using energy tunable soft X rays from third-generation high brilliance synchrotron radiation light sources.…”