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Divalent EuRh 2 Si 2 as a reference for the Luttinger theorem and antiferromagnetism in trivalent heavy-fermion YbRh 2 Si 2

Güttler, M. ; Generalov, A. LU ; Fujimori, S. I. ; Kummer, K. ; Chikina, A. ; Seiro, S. ; Danzenbächer, S. ; Koroteev, Yu M. ; Chulkov, E. V. and Radovic, M. , et al. (2019) In Nature Communications 10(1).
Abstract


Application of the Luttinger theorem to the Kondo lattice YbRh
2
Si
2
suggests that its large 4f-derived Fermi surface (FS) in the paramagnetic (PM) regime should be similar in shape and volume to that of the divalent local-moment antiferromagnet (AFM) EuRh
2
Si ... (More)


Application of the Luttinger theorem to the Kondo lattice YbRh
2
Si
2
suggests that its large 4f-derived Fermi surface (FS) in the paramagnetic (PM) regime should be similar in shape and volume to that of the divalent local-moment antiferromagnet (AFM) EuRh
2
Si
2
in its PM regime. Here we show by angle-resolved photoemission spectroscopy that paramagnetic EuRh
2
Si
2
has a large FS essentially similar to the one seen in YbRh
2
Si
2
down to 1 K. In EuRh
2
Si
2
the onset of AFM order below 24.5 K induces an extensive fragmentation of the FS due to Brillouin zone folding, intersection and resulting hybridization of the Fermi-surface sheets. Our results on EuRh
2
Si
2
indicate that the formation of the AFM state in YbRh
2
Si
2
is very likely also connected with similar changes in the FS, which have to be taken into account in the controversial analysis and discussion of anomalies observed at the quantum critical point in this system.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Communications
volume
10
issue
1
article number
796
publisher
Nature Publishing Group
external identifiers
  • scopus:85061621180
  • pmid:30770811
ISSN
2041-1723
DOI
10.1038/s41467-019-08688-y
language
English
LU publication?
yes
id
403d7dea-5ae3-433e-a109-279ded8fc96a
date added to LUP
2019-02-25 10:29:03
date last changed
2020-01-13 01:30:32
@article{403d7dea-5ae3-433e-a109-279ded8fc96a,
  abstract     = {<p><br>
                                                         Application of the Luttinger theorem to the Kondo lattice YbRh                             <br>
                            <sub>2</sub><br>
                                                         Si                             <br>
                            <sub>2</sub><br>
                                                          suggests that its large 4f-derived Fermi surface (FS) in the paramagnetic (PM) regime should be similar in shape and volume to that of the divalent local-moment antiferromagnet (AFM) EuRh                             <br>
                            <sub>2</sub><br>
                                                         Si                             <br>
                            <sub>2</sub><br>
                                                          in its PM regime. Here we show by angle-resolved photoemission spectroscopy that paramagnetic EuRh                             <br>
                            <sub>2</sub><br>
                                                         Si                             <br>
                            <sub>2</sub><br>
                                                          has a large FS essentially similar to the one seen in YbRh                             <br>
                            <sub>2</sub><br>
                                                         Si                             <br>
                            <sub>2</sub><br>
                                                          down to 1 K. In EuRh                             <br>
                            <sub>2</sub><br>
                                                         Si                             <br>
                            <sub>2</sub><br>
                                                          the onset of AFM order below 24.5 K induces an extensive fragmentation of the FS due to Brillouin zone folding, intersection and resulting hybridization of the Fermi-surface sheets. Our results on EuRh                             <br>
                            <sub>2</sub><br>
                                                         Si                             <br>
                            <sub>2</sub><br>
                                                          indicate that the formation of the AFM state in YbRh                             <br>
                            <sub>2</sub><br>
                                                         Si                             <br>
                            <sub>2</sub><br>
                                                          is very likely also connected with similar changes in the FS, which have to be taken into account in the controversial analysis and discussion of anomalies observed at the quantum critical point in this system.                         <br>
                        </p>},
  author       = {Güttler, M. and Generalov, A. and Fujimori, S. I. and Kummer, K. and Chikina, A. and Seiro, S. and Danzenbächer, S. and Koroteev, Yu M. and Chulkov, E. V. and Radovic, M. and Shi, M. and Plumb, N. C. and Laubschat, C. and Allen, J. W. and Krellner, C. and Geibel, C. and Vyalikh, D. V.},
  issn         = {2041-1723},
  language     = {eng},
  month        = {02},
  number       = {1},
  publisher    = {Nature Publishing Group},
  series       = {Nature Communications},
  title        = {Divalent EuRh                         
                        <sub>2</sub>
                                                 Si                         
                        <sub>2</sub>
                                                  as a reference for the Luttinger theorem and antiferromagnetism in trivalent heavy-fermion YbRh                         
                        <sub>2</sub>
                                                 Si                         
                        <sub>2</sub>},
  url          = {http://dx.doi.org/10.1038/s41467-019-08688-y},
  doi          = {10.1038/s41467-019-08688-y},
  volume       = {10},
  year         = {2019},
}