C. Geibel

Max Planck Society

595Publications

43H-index

8,012Citations

Publications 603

Newest

#1V. F. CorreaH-Index: 4

Last.C. Geibel (MPG: Max Planck Society)H-Index: 43

view all 11 authors...

Thermopower Evolution in Yb(\(\hbox {Rh}_{1-x}\hbox {Co}_x\))\(_2\hbox {Si}_2\) Upon 4f Localization

#1U. StockertH-Index: 6

#2C. KlingnerH-Index: 8

Last.F. Steglich

view all 6 authors...

We present thermopower measurements on Yb(\(\hbox {Rh}_{1-x}\hbox {Co}_x\))\(_2\hbox {Si}_2\). Upon cobalt substitution, the Kondo temperature is decreasing and the single large thermopower minimum observed for \(\hbox {YbRh}_2\hbox {Si}_2\) splits into two minima. Simultaneously, the absolute thermopower values are strongly reduced due to a weaker exchange coupling between the 4f and the conduction electron states with increasing x. Pure \(\hbox {YbCo}_2\hbox {Si}_2\) is considered a stable tri...

Thermopower Evolution in Yb( $\hbox {Rh}_{1-x}\hbox {Co}_x Rh 1 - x Co x ) _2\hbox {Si}_2 2 Si 2 Upon 4f Localization

#1U. StockertH-Index: 6

#2C. KlingnerH-Index: 8

Last.Frank SteglichH-Index: 2

view all 6 authors...

Kondo-lattice ferromagnets and their peculiar order along the magnetically hard axis determined by the crystalline electric field

#1Daniel Hafner (MPG: Max Planck Society)H-Index: 4

#2Binod K. RaiH-Index: 8

Last.Manuel Brando (MPG: Max Planck Society)H-Index: 17

view all 9 authors...

#1U. StockertH-Index: 6

#2C. KlingnerH-Index: 8

Last.Frank Steglich (CAS: Chinese Academy of Sciences)H-Index: 2

view all 6 authors...

We present thermopower measurements on Yb(\(\hbox {Rh}_{1-x}\hbox {Co}_x\))\(_2\hbox {Si}_2\). Upon cobalt substitution, the Kondo temperature is decreasing and the single large thermopower minimum observed for \(\hbox {YbRh}_2\hbox {Si}_2\) splits into two minima. Simultaneously, the absolute thermopower values are strongly reduced due to a weaker exchange coupling between the 4f and the conduction electron states with increasing x. Pure \(\hbox {YbCo}_2\hbox {Si}_2\) is considered a stable tri...

#1U. Stockert (MPG: Max Planck Society)H-Index: 6

#2C. Klingner (MPG: Max Planck Society)H-Index: 8

Last.Frank Steglich (MPG: Max Planck Society)H-Index: 60

view all 6 authors...

#1V. F. CorreaH-Index: 4

Last.C. GeibelH-Index: 43

view all 11 authors...

A very strong magnetoelastic effect in the CeCo_{1-x}e_{x}i alloys is reported. The strength of the magnetostrictive effect can be tuned upon changing x The moderate low-temperature linear magnetostriction observed at low Fe concentrations becomes very large (\frac {\Delta L}{L} \left(16 T,2 K\right) =3\times0^{-3} around the critical concentration (x_c \approx0.23) at which the long-range antiferromagnetic order vanishes. Upon increasing doping through the non-magnetic regi...

#1Sandra Hamann (MPG: Max Planck Society)H-Index: 2

#2Jie Zhang (MPG: Max Planck Society)H-Index: 43

Last.Manuel Brando (MPG: Max Planck Society)H-Index: 17

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Yb(Rh1-xCox)2Si2 is a model system to address two challenging problems in the field of strongly correlated electron systems: The first is the intriguing competition between ferromagnetic (FM) and antiferromagnetic (AFM) order when approaching a magnetic quantum critical point (QCP). The second is the occurrence of magnetic order along a very hard crystalline electric field (CEF) direction, i.e. along the one with the smallest available magnetic moment. Here, we present a detailed study of the ev...

#1J. KlotzH-Index: 1

#2K. GötzeH-Index: 2

Last.Helge Rosner (MPG: Max Planck Society)H-Index: 39

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#1Silvia Seiro (MPG: Max Planck Society)H-Index: 11

#2Lin Jiao (MPG: Max Planck Society)H-Index: 13

Last.Steffen Wirth (MPG: Max Planck Society)H-Index: 18

view all 10 authors...

Strong electron correlations can give rise to extraordinary properties of metals with renormalized Landau quasiparticles. Near a quantum critical point, these quasiparticles can be destroyed and non-Fermi liquid behavior ensues. YbRh2Si2 is a prototypical correlated metal exhibiting the formation of quasiparticle and Kondo lattice coherence, as well as quasiparticle destruction at a field-induced quantum critical point. Here we show how, upon lowering the temperature, Kondo lattice coherence dev...

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