Field-reentrant superconductivity close to a metamagnetic transition in the heavy-fermion superconductor Ute2

Georg Knebel; William Knafo; Alexandre Pourret; Qun Niu; Michal Vališka; Daniel Braithwaite; Gérard Lapertot; Marc Nardone; Abdelaziz Zitouni; Sanu Mishra; Ilya Sheikin; Gabriel Seyfarth; Jean Pascal Brison; Dai Aoki; Jacques Flouquet

doi:10.7566/JPSJ.88.063707

Field-reentrant superconductivity close to a metamagnetic transition in the heavy-fermion superconductor Ute₂

Georg Knebel, William Knafo, Alexandre Pourret, Qun Niu, Michal Vališka, Daniel Braithwaite, Gérard Lapertot, Marc Nardone, Abdelaziz Zitouni, Sanu Mishra, Ilya Sheikin, Gabriel Seyfarth, Jean Pascal Brison, Dai Aoki, Jacques Flouquet

IMR - Materials Processing and Characterization Division

Research output: Contribution to journal › Article › peer-review

92 Citations (Scopus)

Abstract

We present a study of the upper critical field of the newly discovered heavy fermion superconductor UTe₂ by magnetoresistivity measurements in pulsed magnetic fields up to 60 T and static magnetic fields up to 35 T. We show that superconductivity survives up to the metamagnetic transition at H_m ≈ 35 T at low temperature. Above H_m superconductivity is suppressed. At higher temperature superconductivity is enhanced under magnetic field leading to reentrance of superconductivity or an almost temperature independent increase of H_c2. By studying the angular dependence of the upper critical field close to the b-axis (hard magnetization axis) we show that the maximum of the reentrant superconductivity temperature is depinned from the metamagnetic field. A key ingredient for the field-reinforcement of superconductivity on approaching H_m appears to be an immediate interplay with magnetic fluctuations and a possible Fermi-surface reconstruction.

Original language	English
Article number	063707
Journal	Journal of the Physical Society of Japan
Volume	88
Issue number	6
DOIs	https://doi.org/10.7566/JPSJ.88.063707
Publication status	Published - 2019

Access to Document

10.7566/JPSJ.88.063707

Cite this

Knebel, G., Knafo, W., Pourret, A., Niu, Q., Vališka, M., Braithwaite, D., Lapertot, G., Nardone, M., Zitouni, A., Mishra, S., Sheikin, I., Seyfarth, G., Brison, J. P., Aoki, D., & Flouquet, J. (2019). Field-reentrant superconductivity close to a metamagnetic transition in the heavy-fermion superconductor Ute₂ Journal of the Physical Society of Japan, 88(6), Article 063707. https://doi.org/10.7566/JPSJ.88.063707

@article{9f31372e455143fb97f67ad513d21823,

title = "Field-reentrant superconductivity close to a metamagnetic transition in the heavy-fermion superconductor Ute2 ",

abstract = "We present a study of the upper critical field of the newly discovered heavy fermion superconductor UTe2 by magnetoresistivity measurements in pulsed magnetic fields up to 60 T and static magnetic fields up to 35 T. We show that superconductivity survives up to the metamagnetic transition at Hm ≈ 35 T at low temperature. Above Hm superconductivity is suppressed. At higher temperature superconductivity is enhanced under magnetic field leading to reentrance of superconductivity or an almost temperature independent increase of Hc2. By studying the angular dependence of the upper critical field close to the b-axis (hard magnetization axis) we show that the maximum of the reentrant superconductivity temperature is depinned from the metamagnetic field. A key ingredient for the field-reinforcement of superconductivity on approaching Hm appears to be an immediate interplay with magnetic fluctuations and a possible Fermi-surface reconstruction.",

author = "Georg Knebel and William Knafo and Alexandre Pourret and Qun Niu and Michal Vali{\v s}ka and Daniel Braithwaite and G{\'e}rard Lapertot and Marc Nardone and Abdelaziz Zitouni and Sanu Mishra and Ilya Sheikin and Gabriel Seyfarth and Brison, {Jean Pascal} and Dai Aoki and Jacques Flouquet",

note = "Funding Information: Acknowledgment Part of this work at the LNCMI was supported by Programme Investissements d{\textquoteright}Avenir under the program ANR-11-IDEX-0002-02, reference ANR-10-LABX-0037-NEXT. We acknowledge the financial support of the Cross-Disciplinary Program on Instrumentation and Detection of CEA, the French Alternative Energies and Atomic Energy Commission, the ANR-DFG grant “Fermi-NESt”, and KAKENHI (JP15H05882, JP15H05884, JP15K21732, JP16H04006, JP15H05745, JP19H00646). Publisher Copyright: {\textcopyright}2019 The Physical Society of Japan",

year = "2019",

doi = "10.7566/JPSJ.88.063707",

language = "English",

volume = "88",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "The Physical Society of Japan",

number = "6",

}

Knebel, G, Knafo, W, Pourret, A, Niu, Q, Vališka, M, Braithwaite, D, Lapertot, G, Nardone, M, Zitouni, A, Mishra, S, Sheikin, I, Seyfarth, G, Brison, JP, Aoki, D & Flouquet, J 2019, 'Field-reentrant superconductivity close to a metamagnetic transition in the heavy-fermion superconductor Ute₂ ', Journal of the Physical Society of Japan, vol. 88, no. 6, 063707. https://doi.org/10.7566/JPSJ.88.063707

TY - JOUR

T1 - Field-reentrant superconductivity close to a metamagnetic transition in the heavy-fermion superconductor Ute2

AU - Knebel, Georg

AU - Knafo, William

AU - Pourret, Alexandre

AU - Niu, Qun

AU - Vališka, Michal

AU - Braithwaite, Daniel

AU - Lapertot, Gérard

AU - Nardone, Marc

AU - Zitouni, Abdelaziz

AU - Mishra, Sanu

AU - Sheikin, Ilya

AU - Seyfarth, Gabriel

AU - Brison, Jean Pascal

AU - Aoki, Dai

AU - Flouquet, Jacques

N1 - Funding Information: Acknowledgment Part of this work at the LNCMI was supported by Programme Investissements d’Avenir under the program ANR-11-IDEX-0002-02, reference ANR-10-LABX-0037-NEXT. We acknowledge the financial support of the Cross-Disciplinary Program on Instrumentation and Detection of CEA, the French Alternative Energies and Atomic Energy Commission, the ANR-DFG grant “Fermi-NESt”, and KAKENHI (JP15H05882, JP15H05884, JP15K21732, JP16H04006, JP15H05745, JP19H00646). Publisher Copyright: ©2019 The Physical Society of Japan

PY - 2019

Y1 - 2019

N2 - We present a study of the upper critical field of the newly discovered heavy fermion superconductor UTe2 by magnetoresistivity measurements in pulsed magnetic fields up to 60 T and static magnetic fields up to 35 T. We show that superconductivity survives up to the metamagnetic transition at Hm ≈ 35 T at low temperature. Above Hm superconductivity is suppressed. At higher temperature superconductivity is enhanced under magnetic field leading to reentrance of superconductivity or an almost temperature independent increase of Hc2. By studying the angular dependence of the upper critical field close to the b-axis (hard magnetization axis) we show that the maximum of the reentrant superconductivity temperature is depinned from the metamagnetic field. A key ingredient for the field-reinforcement of superconductivity on approaching Hm appears to be an immediate interplay with magnetic fluctuations and a possible Fermi-surface reconstruction.

AB - We present a study of the upper critical field of the newly discovered heavy fermion superconductor UTe2 by magnetoresistivity measurements in pulsed magnetic fields up to 60 T and static magnetic fields up to 35 T. We show that superconductivity survives up to the metamagnetic transition at Hm ≈ 35 T at low temperature. Above Hm superconductivity is suppressed. At higher temperature superconductivity is enhanced under magnetic field leading to reentrance of superconductivity or an almost temperature independent increase of Hc2. By studying the angular dependence of the upper critical field close to the b-axis (hard magnetization axis) we show that the maximum of the reentrant superconductivity temperature is depinned from the metamagnetic field. A key ingredient for the field-reinforcement of superconductivity on approaching Hm appears to be an immediate interplay with magnetic fluctuations and a possible Fermi-surface reconstruction.

UR - http://www.scopus.com/inward/record.url?scp=85067281981&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85067281981&partnerID=8YFLogxK

U2 - 10.7566/JPSJ.88.063707

DO - 10.7566/JPSJ.88.063707

M3 - Article

AN - SCOPUS:85067281981

SN - 0031-9015

VL - 88

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 6

M1 - 063707

ER -

Field-reentrant superconductivity close to a metamagnetic transition in the heavy-fermion superconductor Ute₂

Abstract

Access to Document

Other files and links

Fingerprint

Cite this