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Metallic transition metal dichalcogenides like tantalum diselenide (TaSe$_{2}$) exhibit exciting behaviors at low temperatures, including the emergence of charge density wave (CDW) states. In this work, density functional theory (DFT) is…

The observation of hydrodynamic transport in the metallic delafossite PdCoO$_2$ has increased interest in this family of highly conductive oxides, but experimental studies so far have mostly been confined to bulk crystals. In this work, the…

强关联电子 · 物理学 2022-09-23 David Barbalas , Anaëlle Legros , Gaurab Rimal , Seongshik Oh , N. P. Armitage

We argue that the time-resolved spectrum of selectively-excited resonance fluorescence at low temperature provides a tool for probing the quantum-mechanical level repulsion in the Lifshits tail of the electronic density of states in a wide…

无序系统与神经网络 · 物理学 2007-05-23 A. V. Malyshev , V. A. Malyshev , J. Knoester

Unique optical properties of colloidal semiconductor quantum dots (QDs), arising from quantum mechanical confinement of charge within these structures, present a versatile testbed for the study of how high electric fields affect the…

The structural, electronic, optical and thermodynamic properties of Mo2Ga2C are investigated using density functional theory (DFT) within the generalized gradient approximation (GGA). The optimized crystal structure is obtained and the…

材料科学 · 物理学 2017-04-18 M. A. Ali , M. R. Khatun , N. Jahan , M. M. Hossain

Two-photon excited fluorescence (TPEF) is a standard technique in modern microscopy but still affected by photo-damage of the probe. It was proposed that TPEF can be enhanced by using entangled photons, but has proven to be challenging.…

量子物理 · 物理学 2013-10-17 Andreas Jechow , Michael Seefeldt , Henning Kurzke , Axel Heuer , Ralf Menzel

We investigate the influence of disorders in terminal ethylene groups of BEDT-TTF molecules (ethylene-disorders) on the vortex pinning of the organic superconductor $\kappa$-(BEDT-TTF)$_2$Cu[N(CN)$_2$]Br. Magnetization measurements are…

超导电性 · 物理学 2007-05-23 N. Yoneyama , T. Sasaki , T. Nishizaki , N. Kobayashi

Warm dense matter (WMD) describes an intermediate phase, between condensed matter and classical plasmas, found in natural and man-made systems. In a laboratory setting, WDM needs to be created dynamically. It is typically laser or…

等离子体物理 · 物理学 2022-03-14 Alexander J. White , Lee A. Collins , Katarina Nichols , S. X. Hu

We present a general framework for the design of thin-film photovoltaics based on a partially-disordered photonic crystal that has both enhanced absorption for light trapping and reduced sensitivity to the angle and polarization of incident…

Time-dependent density-functional theory (TDDFT) is widely used to describe electronic excitations in complex finite systems with large numbers of atoms, such as biomolecules and nanocrystals. The first part of this paper will give a simple…

材料科学 · 物理学 2008-08-15 C. A. Ullrich , V. Turkowski

We study the dissipative and Hall viscosity of a disordered noninteracting 2D electrons, both analytically and numerically. Analytically, we employ the self-consistent Born approximation, explicitly taking into account the modification of…

介观与纳米尺度物理 · 物理学 2019-07-17 I. S. Burmistrov , M. Goldstein , M. Kot , V. D. Kurilovich , P. D. Kurilovich

It is well established that for non-interacting electrons, increasing disorder drives a metal into a gapless localized Anderson insulator. While in three dimensions a threshold in disorder must be crossed for the transition, in two…

强关联电子 · 物理学 2015-06-15 Elias Lahoud , O. Nganba Meetei , K. B. Chaska , A Kanigel , Nandini Trivedi

The structural, elastic, electronic, thermal and optical properties of superconducting MAX phases Ti2InX (X = C, N) are investigated by density functional theory (DFT). The results obtained from the least studied nitride phase are discussed…

超导电性 · 物理学 2012-07-25 M. Roknuzzaman , A. K. M. A. Islam

Strong optical pulses at mid-infrared and terahertz frequencies have recently emerged as a powerful tool to manipulate and control the solid state and especially complex condensed matter systems with strongly correlated electrons. The…

强关联电子 · 物理学 2016-08-22 Daniele Nicoletti , Andrea Cavalleri

Laser-Induced Fluorescence (LIF) spectroscopy is an essential tool for probing ion and atom velocity distribution functions (VDFs) in complex plasmas. VDFs carry information about kinetic properties of the species critical for plasma…

等离子体物理 · 物理学 2024-03-19 Ivan Romadanov , Yevgeny Raitses , Andrei Smolyakov

The understanding of various types of disorders in atomically thin transition metal dichalcogenides (TMDs), including dangling bonds at the edges, chalcogen deficiencies in the bulk, and charges in the substrate, is of fundamental…

介观与纳米尺度物理 · 物理学 2016-07-26 Di Wu , Xiao Li , Lan Luan , Xiaoyu Wu , Wei Li , Maruthi N. Yogeesh , Rudresh Ghosh , Zhaodong Chu , Deji Akinwande , Qian Niu , Keji Lai

We present time-dependent density functional theory (TDDFT) calculations of fluorescence emission energies for 284 distinct graphene quantum dots (GQDs) of varying shapes (square, hexagonal, and amorphous) and sizes ($\sim$1-2 nm). These…

材料科学 · 物理学 2024-10-22 Mustafa Çoşkun Özdemir , Caner Ünlü , Şener Özönder

The thermodynamics properties of the wurtzite and zinc-blende \InGaN alloys are calculated using first-principles density-functional calculations. Special quasi-random structures are used to describe the disordered alloys, for $x= 1/4,…

材料科学 · 物理学 2007-05-23 Chee Kwan Gan , Yuan Ping Feng , David J. Srolovitz

We present a formulation of spin-conserving and spin-flip, hybrid time-dependent density functional theory (TDDFT), including the calculation of analytical forces, which allows for efficient calculations of excited state properties of…

材料科学 · 物理学 2023-12-05 Yu Jin , Victor Wen-zhe Yu , Marco Govoni , Andrew C Xu , Giulia Galli

The charge density wave (CDW) phase in 1$T$-TiSe$_2$ is investigated using angle resolved photoemission spectroscopy (ARPES) and neutron scattering measurements. Our ARPES results reveal a clear temperature dependence of the chemical…

强关联电子 · 物理学 2018-07-17 A. Wegner , J. Zhao , J. Li , J. Yang , A. A. Anikin , G. Karapetrov , D. Louca , U. Chatterjee
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