Field-induced compensation of magnetic exchange as the possible origin of reentrant superconductivity in UTe2

被引:8
|
作者
Helm, Toni [1 ,2 ,3 ]
Kimata, Motoi [4 ]
Sudo, Kenta [4 ]
Miyata, Atsuhiko [1 ,2 ]
Stirnat, Julia [1 ,2 ,5 ]
Foerster, Tobias [1 ,2 ]
Hornung, Jacob [1 ,2 ,5 ]
Koenig, Markus [3 ]
Sheikin, Ilya [6 ]
Pourret, Alexandre [7 ]
Lapertot, Gerard [7 ]
Aoki, Dai [8 ]
Knebel, Georg [7 ]
Wosnitza, Joachim [1 ,2 ,5 ]
Brison, Jean-Pascal [7 ]
机构
[1] Helmholtz Zentrum Dresden Rossendorf, Hochfeld Magnetlabor Dresden HLD EMFL, D-01328 Dresden, Germany
[2] Helmholtz Zentrum Dresden Rossendorf, Wurzburg Dresden Cluster Excellence Ct Qmat, D-01328 Dresden, Germany
[3] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany
[4] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[5] Tech Univ Dresden, Inst Festkorper & Mat Phys, D-01062 Dresden, Germany
[6] CNRS, Lab Natl Champs Magnet Intenses LNCMI EMFL, UGA, F-38042 Grenoble, France
[7] Univ Grenoble Alpes, CEA, Grenoble INP, IRIG,PHELIQS, F-38000 Grenoble, France
[8] Tohoku Univ, Inst Mat Res, Oarai, Ibaraki 3111313, Japan
关键词
SINGLE-CRYSTAL GROWTH; METAMAGNETIC TRANSITION; ITINERANT; CERU2SI2;
D O I
10.1038/s41467-023-44183-1
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The potential spin-triplet heavy-fermion superconductor UTe2 exhibits signatures of multiple distinct superconducting phases. For field aligned along the b axis, a metamagnetic transition occurs at mu H-0(m) approximate to 35 T. It is associated with magnetic fluctuations that may be beneficial for the field-reinforced superconductivity surviving up to H-m. Once the field is tilted away from the b towards the c axis, a reentrant superconducting phase emerges just above H-m. In order to better understand this remarkably field-resistant superconducting phase, we conducted magnetic-torque and magnetotransport measurements in pulsed magnetic fields. We determine the record-breaking upper critical field of mu H-0(c2) approximate to 73 T and its evolution with angle. Furthermore, the normal-state Hall effect experiences a drastic suppression indicative of a reduced band polarization above H-m in the angular range around 30 degrees caused by a partial compensation between the applied field and an exchange field. This promotes the Jaccarino-Peter effect as a likely mechanism for the reentrant superconductivity above H-m.
引用
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页数:10
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