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To clarify superconductivity in EuFe2As2 hidden by antiferromagnetism of Eu2+, we investigated a Ca-substituted sample, Eu0.5Ca0.5Fe2As2, under high pressure. For ambient pressure, the sample exhibits a spin-density-wave (SDW) transition at…

Superconductivity · Physics 2010-07-13 Akihiro Mitsuda , Tomohiro Matoba , Hirofumi Wada , Fumihiro Ishikawa , Yuh Yamada

We review the evidence supporting valence-fluctuation mediated superconductivity in CeCu2Si2 and CeCu2Ge2, where Tc reaches 2.4 K at high pressure. In these systems the valence and magnetic critical points, at p_V and p_c respectively, are…

Superconductivity · Physics 2007-05-23 D. Jaccard , Alexander T. Holmes

Pressure induced superconductivity in non-centrosymmetric CeRhSi$_{3}$ and CeIrSi$_{3}$ compounds has attracted significant attention of the scientific community since its discovery 15 years ago. Up-to-date, all reported experimental…

SrxBi2Se3 is recently reported to be a superconductor derived from topological insulator Bi2Se3. It shows a maximum resistive Tc of 3.25 K at ambient pressure. We report magnetic (upto 1 GPa) and transport properties (upro 8 Gpa) under…

Kagome lattice offers unique opportunities for the exploration of unusual quantum states of correlated electrons. Here, we report on the observation of superconductivity in a kagome single crystal Pd3P2S8 when a semiconducting to metallic…

Superconductivity · Physics 2022-09-23 Ying Zhou , Xinyi He , Shuyang Wang , Jing Wang , Xuliang Chen , Yonghui Zhou , Chao An , Min Zhang , Zhitao Zhang , Zhaorong Yang

The van der Waals class of materials offer an approach to two-dimensional magnetism as their spin fluctuations can be tuned upon exfoliation of layers. Moreover, it has recently been shown that spin-lattice coupling and long-range magnetic…

The research on van der Waals (vdW) layered ferromagnets have promoted the development of nanoscale spintronics and applications. However, low-temperature ferromagnetic properties of these materials greatly hinder their applications. Here,…

Materials Science · Physics 2021-11-03 Cheng Zhang , Yue Gu , Le Wang , Lianglong Huang , Ying Fu , Cai Liu , Shanmin Wang , Jia-Wei Mei , Xiaolong Zou , Jun-Feng Dai

Cr2Ge2Te6, a prototypical van der Waals ferromagnetic semiconductor, have attracted significant interest for its potential applications in high-performance spintronics. However, the magnetic ground state of monolayer Cr2Ge2Te6 remains…

We report the results of the pressure-dependent measurements of the static magnetization and of the ferromagnetic resonance (FMR) of Cr$_2$Ge$_2$Te$_6$ to address the properties of the ferromagnetic phase of this quasi-two-dimensional van…

In this paper, pressure effect on superconductivity and magnetism has been investigated in FeSex (x = 0.80, 0.88). The magnetization curves display anomaly at Ts1 106 K and Ts2 78 K except for the superconducting diamagnetic transition…

Superconductivity · Physics 2008-09-02 L. Li , Z. R. Yang , M. Ge , L. Pi , J. T. Xu , B. S. Wang , Y. P. Sun , Y. H. Zhang

The electrical resistivity measurements in the magnetic field are carried out on the pressure-induced superconductor UGe$_2$. The superconductivity is observed from 1.06 to 1.44 GPa. The upper critical field of $H_{C2}$ is anisotropic where…

Condensed Matter · Physics 2009-11-07 T. C. Kobayashi , K. Hanazono , N. Tateiwa , K. Amaya , Y. Haga , R. Settai , Y. Onuki

We report measurements of the temperature and pressure dependence of the electrical resistivity of single crystalline iron-based chalcogenide Cs0.8Fe2Se2. In this material superconductivity Tc~30K develops from a normal state with extremely…

Superconductivity · Physics 2011-04-13 G. Seyfarth , D. Jaccard , P. Pedrazzini , A. Krzton-Maziopa , E. Pomjakushina , K. Conder , Z. Shermadini

Here, we have grown single crystals of LaTe2-xSbx (x=0 and 0.4) with continuously adjustable CDW. High-pressure x-ray diffraction show LaTe2 does not undergo phase transition and keep robust below 40 GPa. In-situ high-pressure electrical…

BaFe2Se3 is a potential superconductor material exhibiting transition at 11 K and ambient pressure. Here we extended the structural and performed electrical resistivity measurements on this compound up to 51 GPa and 20 GPa, respectively, in…

The recent experimental discovery of intrinsic ferromagnetism in single-layer CrI3 opens a new avenue to low-dimensional spintronics. However, the low Curie temperature Tc=45 K is still a large obstacle to its realistic device application.…

Materials Science · Physics 2019-06-26 Hongxing Li , Yuan-Kai Xu , Kang Lai , Wei-Bing Zhang

Generally, the superconductivity was expected to be absent in magnetic systems, but this reception was disturbed by unconventional superconductors, such as cuprates, iron-based superconductors and recently discovered nickelate, since their…

Superconductivity · Physics 2023-08-01 Huchen Shu , Wei Zhong , Jiajia Feng , Hongyang Zhao , Fang Hong , Binbin Yue

In the last six years, Indium selenide (InSe) has appeared as a new van der Waals heterostructure platform which has been extensively studied due to its unique electronic and optical properties. Such as transition metal dichalcogenides…

Two-dimensional (2D) van der Waals (vdW) magnets are crucial for ultra-compact spintronics. However, so far, no vdW crystal has exhibited tunable above-room-temperature intrinsic ferromagnetism in the 2D ultrathin regime. Here, we report…

Materials Science · Physics 2024-09-06 Gaojie Zhang , Jie Yu , Hao Wu , Li Yang , Wen Jin , Bichen Xiao , Wenfeng Zhang , Haixin Chang

The discoveries of intrinsic ferromagnetism in atomically-thin van der Waals crystals have opened up a new research field enabling fundamental studies on magnetism at two-dimensional (2D) limit as well as development of magnetic van der…

We report pressure evolution of charge density wave (CDW) order and emergence of superconductivity (SC) in 1T-VSe2 single crystal by studying resistance and magnetoresistance behavior under high pressure. With increasing quasi-hydrostatic…

Strongly Correlated Electrons · Physics 2020-02-05 S. Sahoo , U. Dutta , L. Harnagea , A. K. Sood , S. Karmakar
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