Large upper critical field in non-centrosymmetric superconductor Y 2C3

H. Q. Yuan; J. Chen; J. Singleton; S. Akutagawa; J. Akimitsu

doi:10.1016/j.jpcs.2010.10.072

Large upper critical field in non-centrosymmetric superconductor Y ₂C₃

H. Q. Yuan, J. Chen, J. Singleton, S. Akutagawa, J. Akimitsu

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

6 Citations (Scopus)

Abstract

We determine the upper critical field ^μ0Hc2( ^Tc) of non-centrosymmetric superconductor Y₂C₃ using two distinct methods: the bulk magnetization M(T) and the tunnel-diode oscillator (TDO) based impedance measurements. It is found that the upper critical field reaches a value of 30 T at zero temperature which is above the weak-coupling Pauli paramagnetic limit. We argue that the observation of such a large ^μ0Hc2(0) in Y₂C₃ could be attributed to the admixture of spin-singlet and spin-triplet pairing states as a result of broken inversion symmetry.

Original language	English
Pages (from-to)	577-579
Number of pages	3
Journal	Journal of Physics and Chemistry of Solids
Volume	72
Issue number	5
DOIs	https://doi.org/10.1016/j.jpcs.2010.10.072
Publication status	Published - May 2011
Externally published	Yes

Keywords

A. Superconductor
D. Critical phenomena
D. Thermodynamic properties

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "Large upper critical field in non-centrosymmetric superconductor Y 2C3",

abstract = "We determine the upper critical field μ0Hc2( Tc) of non-centrosymmetric superconductor Y2C3 using two distinct methods: the bulk magnetization M(T) and the tunnel-diode oscillator (TDO) based impedance measurements. It is found that the upper critical field reaches a value of 30 T at zero temperature which is above the weak-coupling Pauli paramagnetic limit. We argue that the observation of such a large μ0Hc2(0) in Y2C3 could be attributed to the admixture of spin-singlet and spin-triplet pairing states as a result of broken inversion symmetry.",

keywords = "A. Superconductor, D. Critical phenomena, D. Thermodynamic properties",

author = "Yuan, {H. Q.} and J. Chen and J. Singleton and S. Akutagawa and J. Akimitsu",

note = "Funding Information: We acknowledge the helpful discussion with M.B. Salamon. This work was supported by NSFC (No. 10874146 and No. 10934005), the National Basic Research Program of China (No. 2009CB929104), the PCSIRT of the Ministry of Education of China, Zhejiang Provincial Natural Science Foundation of China and the Fundamental Research Funds for the Central Universities. Work at NHMFL-LANL is performed under the auspices of the National Science Foundation, Department of Energy and State of Florida. J.A. was partially supported by “High-Tech Research Center Project” for Private Universities and Grant-in-Aid for Scientific Research from Ministry of Education, Culture, Sports, Science and Technology, Japan.",

year = "2011",

month = may,

doi = "10.1016/j.jpcs.2010.10.072",

language = "English",

volume = "72",

pages = "577--579",

journal = "Journal of Physics and Chemistry of Solids",

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AU - Yuan, H. Q.

AU - Chen, J.

AU - Singleton, J.

AU - Akutagawa, S.

AU - Akimitsu, J.

N1 - Funding Information: We acknowledge the helpful discussion with M.B. Salamon. This work was supported by NSFC (No. 10874146 and No. 10934005), the National Basic Research Program of China (No. 2009CB929104), the PCSIRT of the Ministry of Education of China, Zhejiang Provincial Natural Science Foundation of China and the Fundamental Research Funds for the Central Universities. Work at NHMFL-LANL is performed under the auspices of the National Science Foundation, Department of Energy and State of Florida. J.A. was partially supported by “High-Tech Research Center Project” for Private Universities and Grant-in-Aid for Scientific Research from Ministry of Education, Culture, Sports, Science and Technology, Japan.

PY - 2011/5

Y1 - 2011/5

N2 - We determine the upper critical field μ0Hc2( Tc) of non-centrosymmetric superconductor Y2C3 using two distinct methods: the bulk magnetization M(T) and the tunnel-diode oscillator (TDO) based impedance measurements. It is found that the upper critical field reaches a value of 30 T at zero temperature which is above the weak-coupling Pauli paramagnetic limit. We argue that the observation of such a large μ0Hc2(0) in Y2C3 could be attributed to the admixture of spin-singlet and spin-triplet pairing states as a result of broken inversion symmetry.

AB - We determine the upper critical field μ0Hc2( Tc) of non-centrosymmetric superconductor Y2C3 using two distinct methods: the bulk magnetization M(T) and the tunnel-diode oscillator (TDO) based impedance measurements. It is found that the upper critical field reaches a value of 30 T at zero temperature which is above the weak-coupling Pauli paramagnetic limit. We argue that the observation of such a large μ0Hc2(0) in Y2C3 could be attributed to the admixture of spin-singlet and spin-triplet pairing states as a result of broken inversion symmetry.

KW - A. Superconductor

KW - D. Critical phenomena

KW - D. Thermodynamic properties

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