In:
Chinese Physics Letters, IOP Publishing, Vol. 36, No. 7 ( 2019-06-01), p. 077401-
Abstract:
We report protonation in several compounds by an ionic-liquid-gating method, under optimized gating conditions. This leads to single superconducting phases for several compounds. Non-volatility of protons allows post-gating magnetization and transport measurements. The superconducting transition temperature T c is enhanced to 43.5 K for FeSe 0.93 S 0.07 , and 41 K for FeSe after protonation. Superconducting transitions with T c ∼ 15 K for ZrNCl, ∼7.2 K for 1T-TaS 2 , and ∼3.8 K for Bi 2 Se 3 are induced after protonation. Electric transport in protonated FeSe 0.93 S 0.07 confirms high-temperature superconductivity. Our 1 H nuclear magnetic resonance (NMR) measurements on protonated FeSe 1− x S x reveal enhanced spin-lattice relaxation rate 1/ 1 T 1 with increasing x, which is consistent with the LDA calculations that H + is located in the interstitial sites close to the anions.
Type of Medium:
Online Resource
ISSN:
0256-307X
,
1741-3540
DOI:
10.1088/0256-307X/36/7/077401
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2019
detail.hit.zdb_id:
2040565-0
SSG:
6,25
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