Field-induced transition within the superconducting state of CeRh2As2

S Khim; J F Landaeta; J Banda; N Bannor; M Brando; P M R Brydon; D Hafner; R Küchler; R Cardoso-Gil; U Stockert; A P Mackenzie; D F Agterberg; C Geibel; E Hassinger

doi:10.1126/science.abe7518

Field-induced transition within the superconducting state of CeRh₂As₂

S Khim, J F Landaeta, J Banda, N Bannor, M Brando, P M R Brydon, D Hafner, R Küchler, R Cardoso-Gil, U Stockert, A P Mackenzie, D F Agterberg, C Geibel, E Hassinger^*

^*Corresponding author for this work

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

Abstract

Materials with multiple superconducting phases are rare. Here, we report the discovery of two-phase unconventional superconductivity in CeRh₂As₂ Using thermodynamic probes, we establish that the superconducting critical field of its high-field phase is as high as 14 tesla, even though the transition temperature is only 0.26 kelvin. Furthermore, a transition between two different superconducting phases is observed in a c axis magnetic field. Local inversion-symmetry breaking at the cerium sites enables Rashba spin-orbit coupling alternating between the cerium sublayers. The staggered Rashba coupling introduces a layer degree of freedom to which the field-induced transition and high critical field seen in experiment are likely related.

Original language	English
Pages (from-to)	1012-1016
Number of pages	5
Journal	Science
Volume	373
Issue number	6558
DOIs	https://doi.org/10.1126/science.abe7518
Publication status	Published - 26 Aug 2021

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Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1126/science.abe7518.
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Khim, S. (Contributor), Max Planck Digital Library, 17 Jul 2021
DOI: 10.17617/3.72
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title = "Field-induced transition within the superconducting state of CeRh2As2",

abstract = "Materials with multiple superconducting phases are rare. Here, we report the discovery of two-phase unconventional superconductivity in CeRh2As2 Using thermodynamic probes, we establish that the superconducting critical field of its high-field phase is as high as 14 tesla, even though the transition temperature is only 0.26 kelvin. Furthermore, a transition between two different superconducting phases is observed in a c axis magnetic field. Local inversion-symmetry breaking at the cerium sites enables Rashba spin-orbit coupling alternating between the cerium sublayers. The staggered Rashba coupling introduces a layer degree of freedom to which the field-induced transition and high critical field seen in experiment are likely related.",

author = "S Khim and Landaeta, {J F} and J Banda and N Bannor and M Brando and Brydon, {P M R} and D Hafner and R K{\"u}chler and R Cardoso-Gil and U Stockert and Mackenzie, {A P} and Agterberg, {D F} and C Geibel and E Hassinger",

note = "Funding: We acknowledge funding from the Physics of Quantum Materials department and the research group “Physics of Unconventional Metals and Superconductors (PUMAS)” of the Max Planck Society. C.G. and E.H. acknowledge support from the German Science Foundation (DFG) through grant GE 602/4-1 Fermi-NESt. P.M.R.B. was supported by the Marsden Fund Council from Government funding, managed by Royal Society Te Apārangi. R.K. is supported by the DFG through project. no. KU 3287/1-1. D.F.A. was supported by the US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under award DE-SC0021971.",

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month = aug,

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doi = "10.1126/science.abe7518",

language = "English",

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T1 - Field-induced transition within the superconducting state of CeRh2As2

AU - Khim, S

AU - Landaeta, J F

AU - Banda, J

AU - Bannor, N

AU - Brando, M

AU - Brydon, P M R

AU - Hafner, D

AU - Küchler, R

AU - Cardoso-Gil, R

AU - Stockert, U

AU - Mackenzie, A P

AU - Agterberg, D F

AU - Geibel, C

AU - Hassinger, E

N1 - Funding: We acknowledge funding from the Physics of Quantum Materials department and the research group “Physics of Unconventional Metals and Superconductors (PUMAS)” of the Max Planck Society. C.G. and E.H. acknowledge support from the German Science Foundation (DFG) through grant GE 602/4-1 Fermi-NESt. P.M.R.B. was supported by the Marsden Fund Council from Government funding, managed by Royal Society Te Apārangi. R.K. is supported by the DFG through project. no. KU 3287/1-1. D.F.A. was supported by the US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under award DE-SC0021971.

PY - 2021/8/26

Y1 - 2021/8/26

N2 - Materials with multiple superconducting phases are rare. Here, we report the discovery of two-phase unconventional superconductivity in CeRh2As2 Using thermodynamic probes, we establish that the superconducting critical field of its high-field phase is as high as 14 tesla, even though the transition temperature is only 0.26 kelvin. Furthermore, a transition between two different superconducting phases is observed in a c axis magnetic field. Local inversion-symmetry breaking at the cerium sites enables Rashba spin-orbit coupling alternating between the cerium sublayers. The staggered Rashba coupling introduces a layer degree of freedom to which the field-induced transition and high critical field seen in experiment are likely related.

AB - Materials with multiple superconducting phases are rare. Here, we report the discovery of two-phase unconventional superconductivity in CeRh2As2 Using thermodynamic probes, we establish that the superconducting critical field of its high-field phase is as high as 14 tesla, even though the transition temperature is only 0.26 kelvin. Furthermore, a transition between two different superconducting phases is observed in a c axis magnetic field. Local inversion-symmetry breaking at the cerium sites enables Rashba spin-orbit coupling alternating between the cerium sublayers. The staggered Rashba coupling introduces a layer degree of freedom to which the field-induced transition and high critical field seen in experiment are likely related.

U2 - 10.1126/science.abe7518

DO - 10.1126/science.abe7518

M3 - Article

SN - 0036-8075

VL - 373

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JO - Science

JF - Science

IS - 6558

ER -

Field-induced transition within the superconducting state of CeRh2As2

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Field-induced transition within the superconducting state of CeRh₂As₂