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The electrical transport properties of amorphous Bi films prepared by sequential quench deposition have been studied in situ. A superconductor-insulator (S-I) transition was observed as the film was made increasingly thicker, consistent…

超导电性 · 物理学 2009-11-07 M. M. Rosario , Y. Liu

The elastic and magnetic properties, thermodynamical stability, deviation from stoichiometry and order/disorder transformations of phases that are relevant to Be alloys were investigated using density functional theory simulations coupled…

材料科学 · 物理学 2015-04-01 Patrick A. Burr , Simon C. Middleburgh , Robin W. Grimes

Pb-based compounds have garnered considerable theoretical and experimental attention due to their promising potential in energy-related applications. In this study, we explore the glass-like alkali metal lead oxides X$_2$PbO$_3$ (X=Li, Na,…

The quasi-one-dimensional van der Waals compound Bi$_4$Br$_4$ was recently found to be a promising high-order topological insulator with exotic electronic states. In this paper, we study the electrical transport properties of Bi$_4$Br$_4$…

材料科学 · 物理学 2022-09-14 Dong-Yun Chen , Dashuai Ma , Junxi Duan , Dong Chen , Haiwen Liu , Junfeng Han , Yugui Yao

Understanding lattice dynamics and thermal transport in crystalline compounds with intrinsically low lattice thermal conductivity ($\kappa_L$) is crucial in condensed matter physics. In this work, we investigate the lattice thermal…

材料科学 · 物理学 2025-02-26 Jincheng Yue , Yanhui Liu , Jiongzhi Zheng

Interest in the application of thermoelectric devices for renewable energy has risen over the past decade. In this paper, we calculate the transport properties of various configurations of the transition metal dichalcogenide (TMD) MSe$_2$…

材料科学 · 物理学 2020-02-26 Jonathan Tseng , Xuan Luo

Recently, there is a series of reports by Wang et al. on the superconductivity in K-doped p-terphenyl (KxC18H14) with the transition temperatures range from 7 to 123 Kelvin. Identifying the structural and bonding character is the key to…

超导电性 · 物理学 2018-05-24 Guo-Hua Zhong , Xiao-Hui Wang , Ren-Shu Wang , Jia-Xing Han , Chao Zhang , Xiao-Jia Chen , Hai-Qing Lin

We present thermodynamic, structural and transport measurements on Ba(Fe0.973Cr0.027)2As2 single crystals. All measurements reveal sharp anomalies at ~ 112 K. Single crystal x-ray diffraction identifies the structural transition as a first…

材料科学 · 物理学 2009-07-28 S. L. Bud'ko , S. Nandi , N. Ni , A. Thaler , A. Kreyssig , A. Kracher , J. -Q. Yan , A. I. Goldman , P. C. Canfield

The temperature dependences of the total, crystal lattice and electronic thermal conductivities were investigated in films of topological insulators p-Bi$_{0.5}$Sb$_{1.5}$Te$_{3}$ and p-Bi$_{2}$Te$_{3}$ formed by discrete and thermal…

材料科学 · 物理学 2022-07-12 L N Lukyanova , Yu A Boikov , O A Usov , V A Danilov , I V Makarenko , V N Petrov

The polycrystalline Bi1-xHoxFeO3 (x=0, 0.05, 0.1) compounds were synthesized by conventional solid-state route. Rietveld refinement reveals that all the compounds were stabilized in rhombohedral structure with R3c (IUCr No. 161) space…

材料科学 · 物理学 2015-01-06 T. Durga Rao , T. Karthik , Adiraj Srinivas , Saket Asthana

Temperature-driven metal-insulator and pressure-driven insulator-metal transitions observed in(BEDT-TTF)8[Hg4X12(C6H5Y)2]] with X = Y = Br are studied through band structure calculations based on X-ray crystal structure determination and…

We performed high-pressure transport measurements on high-quality single crystals of KOs2O6, a beta-pyrochlore superconductor. While the resistivity at high temperatures might approach saturation, there is no sign of saturation at low…

超导电性 · 物理学 2007-05-23 A. Akrap , E. Tutis , S. M. Kazakov , N. D. Zhigadlo , J. Karpinski , L. Forro

We report the angle dependent high field (up to 140kOe) magneto transport of Bi2Te3 single crystals, a well-known topological insulator. The crystals were grown from melt of constituent elements via solid state reaction route by self-flux…

材料科学 · 物理学 2018-03-14 Rabia Sultana , P. K. Maheshwari , Brajesh Tiwari , V. P. S. Awana

In this study, we investigate the bulk electronic structure of Pb-substituted LaO$_{0.5}$F$_{0.5}$BiS$_2$ single crystals, using two types of hard-x-ray spectroscopy. High-energy-resolution fluorescence-detected x-ray absorption…

RuP single crystals of MnP-type orthorhombic structure were synthesized by the Sn flux method. Temperature-dependent x-ray diffraction measurements reveal that the compound experiences two structural phase transitions, which are further…

强关联电子 · 物理学 2015-03-06 R. Y. Chen , Y. G. Shi , P. Zheng , L. Wang , T. Dong , N. L. Wang

We present a theoretical study of electronic and thermal transport in polycrystalline heterostructures combining graphene (G) and hexagonal boron nitride (hBN) grains of varying size and distribution. By increasing the hBN grain density…

介观与纳米尺度物理 · 物理学 2025-06-06 J. E. Barrios Vargas , B. Mortazavi , A. W. Cummings , R. Martinez-Gordillo , M. Pruneda , L. Colombo , T. Rabczuk , S. Roche

The present theoretical study focuses on the structural, electronic and thermoelectric properties of PbTe, PbSe and their ternary alloys PbSe$_{x}$Te$_{1-x}$, using the density functional theory (DFT) by the full potential linearised…

材料科学 · 物理学 2025-12-29 M. Kaid Slimane , B. N. Brahmi , M. Bouchenaki , S. Bekhechi

The temperature dependence of dark conductivity at low temperatures (300-15 K) was studied on a wide microstructural range of well-characterized highly crystallized single phase undoped microcrystalline silicon samples. Our study reveals…

材料科学 · 物理学 2011-11-09 Sanjay K. Ram , Satyendra Kumar , P. Roca i Cabarrocas

Bi2Se3 is an important semiconductor thermoelectric material and a prototype topological insulator. Here we report observation of Shubnikov-de Hass (SdH) oscillations accompanied by quantized Hall resistances (Rxy) in highly-doped n-type…

强关联电子 · 物理学 2012-04-13 Helin Cao , Jifa Tian , Ireneusz Miotkowski , Tian Shen , Jiuning Hu , Shan Qiao , Yong P. Chen

There has been growing interest in structural quantum phase transitions and quantum fluctuations of phonons in the research area of condensed matter physics. Here, we report the observation of glass-like features in the lattice heat…

材料科学 · 物理学 2019-08-21 Y. Ishii , Y. Ouchi , S. Kawaguchi , H. Ishibashi , Y. Kubota , S. Mori