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We have found that various Mn oxides have the universal resistivity and thermopower in the high temperature limit. The resistivities and thermopowers of all the samples go toward constant values of 7$\pm$1 m$\Omega$cm and $-79\pm$3…

材料科学 · 物理学 2009-11-10 W. Kobayashi , I. Terasaki , M. Mikami , R. Funahashi , T. Nomura , T. Katsufuji

We report on the temperature dependent electron transport in graphene at different carrier densities $n$. Employing an electrolytic gate, we demonstrate that $n$ can be adjusted up to 4$\times10^{14}$cm$^{-2}$ for both electrons and holes.…

介观与纳米尺度物理 · 物理学 2010-12-14 Dmitri K. Efetov , Philip Kim

We present a wide grid of models for the structure and transmission properties of warm absorbers in active galactic nuclei (AGN). Contrary to commonly used constant density models, our absorbing cloud is assumed to be under constant total…

天体物理学 · 物理学 2007-05-23 A. Rozanska , R. Goosmann , A. -M. Dumont , B. Czerny

We have measured the electron spin relaxation rate and the integrated spin noise power in n-doped GaAs for temperatures between 4 K and 80 K and for doping concentrations ranging from 2.7 x 10^{-15} cm^{-3} to 8.8 x 10^{-16} cm^{-3} using…

介观与纳米尺度物理 · 物理学 2013-05-29 M. Römer , H. Bernien , G. Müller , D. Schuh , J. Hübner , M. Oestreich

We present numerical simulations of the acoustic-phonon-limited mobility, $\mu_{ac}$, and phonon-drag thermopower, $S^{g}$, in two-dimensional electron gases confined in MgZnO/ZnO heterostructures. The calculations are based on the…

介观与纳米尺度物理 · 物理学 2015-06-19 Margarita Tsaousidou

Electrical energy is considered as a fundamental parameter for inclusion in Fermi gas theory, in addition to thermal energy. It is argued that electrical energy can move some electrons to above the Fermi Level, providing free charges to…

材料科学 · 物理学 2022-06-15 C. A. M. dos Santos , M. S. da Luz , F. S. Oliveira , L. M. S Alves

A new ab initio interaction potential for the electronic ground state of the argon dimer has been developed. The new potential uses previously calculated accurate Born--Oppenheimer potential while significantly improving the description of…

化学物理 · 物理学 2024-04-10 Jakub Lang , Michal Przybytek , Michal Lesiuk

A scanning force microscope with a base temperature below 300 mK is used for measuring the local electron density of a two-dimensional electron gas embedded in an Ga[Al]As heterostructure. At different separations between AFM tip and…

介观与纳米尺度物理 · 物理学 2009-11-10 T. Vancura , S. Kicin , T. Ihn , K. Ensslin , M. Bichler , W. Wegscheider

Static thermal equilibrium of a quantum self-gravitating ideal gas in general relativity is studied at any temperature, taking into account the Tolman-Ehrenfest effect. Thermal contribution to the gravitational stability of static neutron…

广义相对论与量子宇宙学 · 物理学 2015-01-08 Zacharias Roupas

We use first-principles electronic-structure theory to determine the intra- and inter-valley electron-alloy scattering parameters in n-type GeSn alloys. These parameters are used to determine the alloy scattering contributions to the n-type…

材料科学 · 物理学 2025-02-03 Kevin Sewell , Felipe Murphy-Armando

The growth and the density dependence of the low temperature mobility of a series of two-dimensional electron systems confined to un-intentionally doped, low extended defect density InAs quantum wells with Al$_{1-x}$Ga$_{x}$Sb barriers are…

Current and future experiments need to know the stopping power of liquid argon. It is used directly in calibration, where commonly the minimum-ionizing portion of muon tracks is used as a standard candle. Similarly, muon range is used as a…

仪器与探测器 · 物理学 2023-11-15 M. Strait

At high dissipation levels, vortex motion in a superconducting film has been observed to become unstable at a certain critical vortex velocity v*. At substrate temperatures substantially below Tc, the observed behavior can be accounted for…

超导电性 · 物理学 2009-11-11 James M. Knight , Milind N. Kunchur

We derive here, from first principles, the energy-momentum densities of a perfect fluid, in the form of an ideal molecular gas, in an inertial frame where the fluid possesses a bulk motion. We begin from the simple expressions for the…

综合物理 · 物理学 2020-10-12 Ashok K. Singal

The mobility of electrons and holes in silicon depends on many parameters. Two of them are the electric field and the temperature. It has been observed previously that the mobility in the transition region between ohmic transport and…

仪器与探测器 · 物理学 2011-08-16 Julian Becker , Eckhart Fretwurst , Robert Klanner

The depth distribution of the transport properties as well as the temperature dependence of the low field magneto-conductance for several c-axis oriented GaN nanowall network samples grown with different average wall-widths are…

介观与纳米尺度物理 · 物理学 2014-11-04 H. P. Bhasker , Varun Thakur , S. M. Shivaprasad , S. Dhar

The coupling of optical and electronic degrees of freedom together with quantum confinement in low-dimensional electron systems is particularly interesting for achieving exotic functionalities in strongly correlated oxide electronics.…

We report on the results of a high voltage test in liquid argon in order to measure its dielectric rigidity. Under stable conditions and below the boiling point, liquid argon was found to sustain a uniform electric field of 100 kV/cm,…

仪器与探测器 · 物理学 2014-01-14 F. Bay , C. Cantini , S. Murphy , F. Resnati , A. Rubbia , F. Sergiampietri , S. Wu

A phase diagram of argon based upon percolation transition loci determined from literature experimental density-pressure isotherms, and simulation values using a Lennard-Jones model shows three fluid phases. The liquid phase spans all…

统计力学 · 物理学 2012-06-14 Leslie V. Woodcock

We performed small-angle X-ray scattering measurements of liquid Te using a synchrotron radiation facility and observed the maximum scattering intensity near 620 K in the supercooled region (melting temperature 723 K). This result is an…

软凝聚态物质 · 物理学 2024-01-18 Yukio Kajihara , Masanori Inui , Kazuhiro Matsuda , Koji Ohara