Temperature and angular dependence of the upper critical field in K2Cr3As3
Journal Article
·
· Physical Review B
- Huazhong University of Science and Technology, Wuhan (China); DOE/OSTI
- Zhejiang University, Hangzhou (China)
- Huazhong University of Science and Technology, Wuhan (China)
- Zhejiang University, Hangzhou (China); Collaborative Innovation Centre of Advanced Microstructures (China)
- Univ. of Minnesota, Minneapolis, MN (United States)
We report measurements of the upper critical field Hc2 as functions of temperature T, polar angle θ (of the field direction with respect to the crystallographic c axis), and azimuthal angle Φ (of the field direction relative to the a axis within the ab plane) for the Cr-based superconductor K2Cr3As3 with a quasi-one-dimensional and noncentrosymmetric crystal structure. We confirm that the anisotropy in Hc2(T) becomes inverse with decreasing temperature. At low temperatures, Hc2(θ) data are featured by two maxima at θ = 0 (H∥c) and π/2 (H⊥c), which can be quantitatively understood only if uniaxial effective-mass anisotropy and absence of Pauli paramagnetic effect for H⊥c are taken simultaneously into consideration. The in-plane Hc2(Φ) profile shows a unique threefold modulation especially at low temperatures. Overall, the characteristics of the Hc2(θ, Φ, T) data mostly resemble those of the heavy-fermion superconductor UPt3, and we argue in favor of a dominant spin-triplet superconductivity with odd parity in K2Cr3As3.
- Research Organization:
- Univ. of Minnesota, Minneapolis, MN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- SC0012336
- OSTI ID:
- 1535818
- Alternate ID(s):
- OSTI ID: 1338098
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 1 Vol. 95; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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