Yun-Lei Sun

Possible charge-density wave, superconductivity, andf-electron valence instability inEuBiS2F

Superconductivity (SC) and charge-density wave (CDW) are two contrasting yet relevant collective electronic states which have received sustained interest for decades. Here we report that, in a layered europium bismuth sulfofluoride, EuBiS

Ba2Ti2Fe2As4O: A New Superconductor Containing Fe2As2 Layers and Ti2O Sheets

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Unconventional superconductivity in quasi-one-dimensionalRb2Cr3As3

F, a CDW-like transition occurs at 280 K, below which SC emerges at 0.3 K, without any extrinsic doping. The Eu ions were found to exhibit an anomalously temperature-independent mixed valence of about +2.2, associated with the formation of CDW. The mixed valence of Eu gives rise to self electron doping into the conduction bands mainly consisting of the in-plane Bi-6

Anomalous Eu Valence State and Superconductivity in Undoped Eu3Bi2S4F4

p

Sr and Mn co-doped LaCuSO: A wide band gap oxide diluted magnetic semiconductor with TC around 200 K

states, which in turn brings about the CDW and SC. In particular, the electronic specific-heat coefficient is enhanced by ~ 50 times, owing to the significant hybridizations between Eu-4

Superconductivity in a layered Ta4Pd3Te16 with PdTe2 chains.

f

Superconductivity, charge- or spin-density wave, and metal-nonmetal transition in BaTi2(Sb1−xBix)2O

and Bi-6

Anisotropic superconductivity in Eu(Fe0.75Ru0.25)2As2 ferromagnetic superconductor

p

Design and Synthesis of a New Layered Thermoelectric Material LaPbBiS3O

electrons, as verified by band-structure calculations. Thus, EuBiS

Insulator-to-metal transition and large thermoelectric effect in La1−xSrxMnAsO

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