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Title: Tuning from frustrated magnetism to superconductivity in quasi-one-dimensional KCr 3 As 3 through hydrogen doping

Journal Article · · Physical Review B

We report the charge doping of KCr3As3 via H intercalation. We show that the previously reported ethanol bath deintercalation of K2Cr3As3 to KCr3As3 has a secondary effect whereby H from the bath enters the quasi-one-dimensional Cr6As6 chains. Furthermore, we find that—contrary to previous interpretations—the difference between nonsuperconducting as-grown KCr3As3 samples and superconducting hydrothermally annealed samples is not a change in crystallinity but due to charge doping, with the latter treatment increasing the H concentration in the CrAs tubes, effectively electron doping the 133 compound. These results suggest another stoichiometry KHxCr3As3, that superconductivity arises from a suppressed magnetic order via a tunable parameter and paves the way for a charge-doped phase diagram in these materials.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1606691
Alternate ID(s):
OSTI ID: 1646499
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 22 Vol. 100; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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