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Related papers: Optimally Designed Digitally-Doped Mn:GaAs

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In density functional theory, simpler exchange-correlation (XC) approximations such as the local density approximation (LDA) are favored for computational speed but rely on limited information, leading to a trade-off between accuracy and…

Chemical Physics · Physics 2026-05-12 Karim K. Alaa El-Din , Antonius v. Strachwitz , Ana Coutinho Dutra , Sam M. Vinko

The standard model of Mn doping in GaAs is subjected to a coherent potential approximation (CPA) treatment. Transport coefficients are evaluated within the linear response Kubo formalism. Both normal (NHE) and anomalous contributions (AHE)…

Materials Science · Physics 2009-11-13 Louis-Francois Arsenault , B. Movaghar , P. Desjardins , A. Yelon

We perform a theoretical study of the electronic structure and magnetic properties of the prototypical magnetic MAX-phase Mn$_2$GaC with the main focus given to the origin of magnetic interactions in this system. Using the density…

Strongly Correlated Electrons · Physics 2022-01-21 H. J. M. Jönsson , M. Ekholm , I. Leonov , M. Dahlqvist , J. Rosen , I. A. Abrikosov

We examine the thermodynamic properties of the hole- and electron-doped cuprates by using the t-t'-t''-J model. We find that the chemical potential shows different doping dependence between the hole and electron dopings. Recent experimental…

Strongly Correlated Electrons · Physics 2007-05-23 T. Tohyama , S. Maekawa

In strongly correlated transition metal dichalcogenides, an intricate interplay of polaronic distortions, stacking arrangement, and electronic correlations determines the nature of the insulating state. Here, we study the response of the…

We present the investigation results of the in-plane \{rho}(T) resistivity tensor at the temperature range 0.4-40 K in magnetic fields up to 90kOe (H||c, J||ab) for electron-doped Nd{2-x}Ce{x}CuO{4+{\delta}} with different degree of…

Cross sectional scanning tunneling microscopy (XSTM) and density functional theory have been used to characterize the structure of GaSb digitally doped with Mn. The Mn dopants are found in both isolated substitutional form as well as in…

Materials Science · Physics 2009-11-10 G. I. Boishin , J. M. Sullivan , L. J. Whitman

The doping dependence of the themopower, in-plane resistivity rho_ab(T), out-of-plane resistivity rho_c(T), and susceptibility has been systematically measured for high-quality single crystal Bi2Sr2Ca2Cu3O10+delta. We found that the…

Superconductivity · Physics 2009-11-07 Takenori Fujii , Ichiro Terasaki , Takao Watanabe , Azusa Matsuda

The recently discovered high-temperature superconductivity in doped quaternary iron oxypnictides correlates experimentally with a magnetic instability. We have used first-principles calculations to determine a magnetic phase diagram of…

Superconductivity · Physics 2008-10-21 Zhicheng Zhong , Qinfang Zhang , P. X. Xu , Paul J. Kelly

Modulation-doped heterostructures are a key enabler for realizing high mobility and better scaling properties for high performance transistors. We report the realization of modulation-doped two-dimensional electron gas (2DEG) at…

We show that Mn_2VAl is a compound for which the generalized gradient approximation (GGA) to the exchange-correlation functional in density functional theory makes a qualitative change in predicted behavior compared to the usual local…

Materials Science · Physics 2009-10-31 Ruben Weht , Warren E. Pickett

The hot-wall metal-organic chemical vapor deposition (MOCVD), previously shown to enable superior III-nitride material quality and high performance devices, has been explored for Mg doping of GaN. We have investigated the Mg incorporation…

We consider a mixed analog-to-digital converter (ADC) based architecture for direction of arrival (DOA) estimation using a uniform linear array (ULA). We derive the Cram{\'e}r-Rao bound (CRB) of the DOA under the optimal time-varying…

Signal Processing · Electrical Eng. & Systems 2023-05-16 Xinnan Zhang , Yuanbo Cheng , Xiaolei Shang , Jun liu

We report silicon delta doping in Gallium Oxide (\b{eta}-Ga2O3) grown by plasma assisted molecular beam epitaxy using a shutter pulsing technique. We describe growth procedures that can be used to realize high Si incorporation in an…

Mesoscale and Nanoscale Physics · Physics 2017-05-24 Sriram Krishnamoorthy , Zhanbo Xia , Sanyam Bajaj , Mark Brenner , Siddharth Rajan

The electronic structure of the intercalated iron-based superconductor Ba2Ti2Fe2As4O (Tc - 21.5 K) has been investigated by using angle-resolved photoemission spectroscopy and combined local density approximation and dynamical mean field…

We show how one can construct \alert{a simple} exchange functional by extending the well-know local-density approximation (LDA) to finite uniform electron gases. This new generalized local-density approximation (GLDA) functional uses only…

Chemical Physics · Physics 2017-05-01 Pierre-François Loos

The Y1-xLixBa2Cu3O7-d polycrystalline bulk superconductors doped with Li substituting at the Y site at different concentrations (x = 0, 0.01, 0.02, 0.1) were prepared using the citrate-gel method to study the effects of doping on the…

We develop a theory for the maximum achievable mobility in modulation-doped 2D GaAs-AlGaAs semiconductor structures by considering the momentum scattering of the 2D carriers by the remote ionized dopants which must invariably be present in…

Mesoscale and Nanoscale Physics · Physics 2015-05-08 S. Das Sarma , E. H. Hwang , S. Kodiyalam , L. N. Pfeiffer , K. W. West

Explosive crystallization (EC) is often observed when using nanosecond-pulsed melt laser annealing (MLA) in amorphous silicon (Si) and germanium (Ge). The solidification velocity in EC is so fast that a diffusion-less crystallization can be…

Materials Science · Physics 2022-04-26 Toshiyuki Tabata , Karim , Huet , Fabien Rozé , Fulvio Mazzamuto , Bernard Sermage , Petros Kopalidis , Dwight Roh

Acceptor and donor doping is a standard for tailoring semiconductors. More recently, doping was adapted to optimize the behavior at ferroelectric domain walls. In contrast to more than a century of research on semiconductors, the impact of…