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Research ArticlePHYSICS
Fully gapped superconductivity with no sign change in the prototypical heavy-fermion CeCu2Si2
- Takuya Yamashita1,*,
- Takaaki Takenaka2,*,
- Yoshifumi Tokiwa1,*,
- Joseph A. Wilcox3,*,
- Yuta Mizukami2,
- Daiki Terazawa1,
- Yuichi Kasahara1,
- Shunichiro Kittaka4,
- Toshiro Sakakibara4,
- Marcin Konczykowski5,
- Silvia Seiro6,
- Hirale S. Jeevan6,
- Christoph Geibel6,
- Carsten Putzke3,
- Takafumi Onishi1,
- Hiroaki Ikeda7,
- Antony Carrington3,†,
- Takasada Shibauchi2,† and
- Yuji Matsuda1,†
- 1Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
- 2Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan.
- 3H. H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1TL, UK.
- 4Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
- 5Laboratoire des Solides Irradiés, École Polytechnique, CNRS, Commissariat à l’Energie Atomique et aux Energies Alternatives, Université Paris-Saclay, 91128 Palaiseau Cedex, France.
- 6Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
- 7Department of Physics, Ritsumeikan University, Kusatsu 525-8577, Japan.
- ↵†Corresponding author. Email: a.carrington{at}bristol.ac.uk (A.C.); shibauchi{at}k.u-tokyo.ac.jp (T.S.); matsuda{at}scphys.kyoto-u.ac.jp (Y.M.)
↵* These authors contributed equally to this work.
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Science Advances 23 Jun 2017:
Vol. 3, no. 6, e1601667
DOI: 10.1126/sciadv.1601667
Vol. 3, no. 6, e1601667
DOI: 10.1126/sciadv.1601667
Takuya Yamashita
Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
Takaaki Takenaka
Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan.
Yoshifumi Tokiwa
Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
Joseph A. Wilcox
H. H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1TL, UK.
Yuta Mizukami
Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan.
Daiki Terazawa
Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
Yuichi Kasahara
Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
Shunichiro Kittaka
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
Toshiro Sakakibara
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
Marcin Konczykowski
Laboratoire des Solides Irradiés, École Polytechnique, CNRS, Commissariat à l’Energie Atomique et aux Energies Alternatives, Université Paris-Saclay, 91128 Palaiseau Cedex, France.
Silvia Seiro
Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
Hirale S. Jeevan
Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
Christoph Geibel
Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
Carsten Putzke
H. H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1TL, UK.
Takafumi Onishi
Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
Hiroaki Ikeda
Department of Physics, Ritsumeikan University, Kusatsu 525-8577, Japan.
Antony Carrington
H. H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1TL, UK.
Takasada Shibauchi
Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan.
Yuji Matsuda
Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
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