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The trigonal ${\alpha}$-HgS has a 3-fold helical chain structure, and is in form of a noncentrosymmetric $P3_121$ phase, known as the cinnabar phase. However, under pressure, the helical chains gradually approach and connect with each…

超导电性 · 物理学 2023-12-29 He Zhang , Wei Zhong , Yanghao Meng , Bowen Tang , Binbin Yue , Xiaohui Yu , Fang Hong

We report the synthesis of single phase Bi3O2S3 sample and confirm the occurrence of bulk superconductivity with transition temperature at 5.8 K. The Bi3O2S3 super-conductor is categorized as the typical type-II supercon-ductor based on the…

超导电性 · 物理学 2014-11-06 Jifeng Shao , Zhongheng Liu , Xiong Yao , Li Pi , Shun Tan , Changjin Zhang , Yuheng Zhang

Here we use global and local magnetometry and Hall probe imaging to investigate the electromagnetic connectivity of the superconducting current path in the oxygen-deficient fluorine-free Nd-based oxypnictides. High resolution transmission…

Monolayer Molybdenum Disulfide (MoS2) with a direct band gap of 1.8 eV is a promising two-dimensional material with a potential to surpass graphene in next generation nanoelectronic applications. In this letter, we synthesize monolayer MoS2…

介观与纳米尺度物理 · 物理学 2013-06-18 Han Liu , Mengwei Si , Sina Najmaei , Adam T. Neal , Yuchen Du , Pulickel M. Ajayan , Jun Lou , Peide D. Ye

The bulk polycrystalline sample FeSe1/2Te1/2 is synthesized by solid state reaction route in an evacuated sealed quartz tube at 750 oC. The presence of superconductivity is confirmed through magnetization/thermoelectric/resistivity studies.…

超导电性 · 物理学 2015-05-20 V. P. S. Awana , Govind , Anand Pal , Bhasker Gahtori , S. D. Kaushik , A. Vajpayee , Jagdish Kumar , H. Kishan

We have determined the crystal structures and superconducting transition temperatures of La1.48Nd0.4Sr0.12CuO4 under nearly hydrostatic pressures in diamond anvil cells to 5.0 GPa and 19.0 GPa, respectively. Synchrotron x-ray powder…

Single crystals of In-doped PbBi2Te4 are synthesized via a conventional solid-state method. Chemical analysis and hall measurements indicate that In replaces Pb, introducing n-type carriers, creating Pb1-xInxBi2Te4. A superconducting…

超导电性 · 物理学 2023-08-25 Xianghan Xu , Danrui Ni , Weiwei Xie , R. J. Cava

In this study, we conducted various magnetotransport measurements on Fe$_{1+y}$Te$_{1-x}$Se$_{x}$ single crystals from which excess iron was sufficiently removed. Our results revealed that crossover from the incoherent to the coherent…

The noncentrosymmetric superconductor Mo$_3$Rh$_2$N, with $T_c = 4.6$ K, adopts a $\beta$-Mn-type structure (space group $P$4$_1$32), similar to that of Mo$_3$Al$_2$C. Its bulk superconductivity was characterized by magnetization and…

超导电性 · 物理学 2018-11-20 T. Shang , Wesen Wei , C. Baines , J. L. Zhang , H. F. Du , M. Medarde , M. Shi , J. Mesot , T. Shiroka

Two-dimensional (2D) transition-metal dichalcogenide (TMDs) MoTe2 has attracted much attention due to its predicted Weyl semimetal (WSM) state and a quantum spin Hall insulator in bulk and monolayer form, respectively. We find that the…

Superconductivity in two-dimensional compounds is widely concerned, not only due to its application in constructing nano-superconducting devices, but also for the general scientific interests. Very recently, borophene (two-dimensional boron…

超导电性 · 物理学 2017-01-13 Miao Gao , Qi-Zhi Li , Xun-Wang Yan , Jun Wang

Using both muon spin rotation and muon spin relaxation, the superconducting ground state of the Heusler superconductor {ZrNi$_2$Ga} has been studied. The temperature dependence of the magnetic penetration depth of {ZrNi$_2$Ga} is consistent…

超导电性 · 物理学 2012-06-07 A. D. Hillier , N. Parzyk , D. Mck Paul

The discovery of high temperature superconductivity in La[O1-xFx]FeAs at the beginning of this year [1] has generated much excitement and has led to the rapid discovery of similar compounds with as high as 55 K transition temperatures [2].…

超导电性 · 物理学 2008-06-30 M. C. Boyer , Kamalesh Chatterjee , W. D. Wise , G. F. Chen , J. L. Luo , N. L. Wang , E. W. Hudson

We report investigations of molybdenum nitride (MoN) thin films with different thickness and disorder and with superconducting transition temperature 9.89 K $\ge{T_c}\ge$ 2.78 K. Using terahertz frequency-domain spectroscopy we explore the…

We present electrical transport, magnetization, and specific heat measurements on bulk MgB2 samples (T_{c} = 38.5 K) synthesized under 200 MPa pressure using a process based on hot isostatic pressing with cooling under pressure. The samples…

超导电性 · 物理学 2009-11-07 N. A. Frederick , Shi Li , M. B. Maple , V. F. Nesterenko , S. S. Indrakanti

Low temperature specific heat (SH) has been measured in K$_x$Fe$_{2-y}$Se$_2$ single crystals with T$_c$ = 32 K. The SH anomaly associated with the superconducting transition is moderate and sharp yielding a value of $\Delta C/T \mid_{T_c}$…

超导电性 · 物理学 2011-04-20 Bin Zeng , Bing Shen , Genfu Chen , Jianbao He , Duming Wang , Chunhong Li , Hai-Hu Wen

We have performed electrical resistivity measurements of a polycrystalline sample of FeSe$_{0.25}$Te$_{0.75}$, which exhibits superconductivity at $T_{\rm c} \sim 14$ K, in magnetic fields up to 55 T to determine the upper critical field…

We report synthesis, structural, magnetic, specific heat and Density Functional Theory (DFT) studies on MgCNi3 superconductor. Polycrystalline MgCNi3 samples are synthesized through standard solid state reaction route and found to…

Experimental discovery of near-room-temperature superconductivity in highly compressed hydrogen sulfate started a new era in superconductivity. To date, researchers have made the discovery of dozens of superconducting hydride phases with…

超导电性 · 物理学 2024-01-04 E. F. Talantsev

We investigate the temperature dependence of the lower critical field $H_{c1}(T)$, the field at which vortices penetrate into the sample, of a high-quality fluorine-doped NdFeAsO single crystal under static magnetic fields $H$ parallel to…

超导电性 · 物理学 2017-09-18 A. Adamski , C. Krellner , M. Abdel-Hafiez
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