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Dark matter (DM) is largely believed to be the dominant component of the matter content of the Universe. Astronomical measurements can be utilized to search for Standard Model (SM) annihilation or decay products of DM, complementing direct…

高能天体物理现象 · 物理学 2021-08-16 Chiara Giuri

The DAMIC (Dark Matter in CCDs) experiment searches for the interactions of dark matter particles with the nuclei and the electrons in the silicon bulk of thick fully depleted charge-coupled devices (CCDs). Because of the low noise and low…

高能物理 - 实验 · 物理学 2020-04-02 Mariangela Settimo

Directional detection of Dark Matter allows for unambiguous direct detection of WIMPs as well as discrimination between various Dark Matter models in our galaxy. The DMTPC detector is a low-pressure TPC with optical readout designed for…

A neutral Dirac fermion is supplied as a singlet within the context of the standard model (SM) and is considered as a dark matter (DM) candidate near electroweak scale (10-1000 GeV) with nonzero magnetic dipole moment. The Dirac particles…

高能物理 - 唯象学 · 物理学 2010-09-17 Jae Ho Heo

Zinc oxynitride (ZnO$_x$N$_y$) has recently emerged as a highly promising band gap-tunable semiconductor material for optoelectronic applications. In this study, a novel DC reactive sputtering protocol was developed to fabricate…

材料科学 · 物理学 2023-02-17 Kiran Jose , J. G. Anjana , Venu Anand , Aswathi R. Nair

We study the sensitivity of multi ton-scale time projection chambers using a liquid xenon target, e.g., the proposed DARWIN instrument, to spin-independent and spin-dependent WIMP-nucleon scattering interactions. Taking into account…

仪器与探测器 · 物理学 2015-10-14 Marc Schumann , Laura Baudis , Lukas Bütikofer , Alexander Kish , Marco Selvi

The DFT-1/2 method in density functional theory [L. G. Ferreira et al., Phys. Rev. B 78, 125116 (2008)] aims to provide accurate band gaps at the computational cost of semilocal calculations. The method has shown promise in a large number…

材料科学 · 物理学 2019-03-04 Jan Doumont , Fabien Tran , Peter Blaha

Experimental efforts of the last decades have been unsuccessful in detecting WIMPs (Weakly Interacting Massive Particles) in the 10-to-10$^4$ GeV/$c^2$ range, thus motivating the search for lighter dark matter. The DAMIC (DArk Matter In…

宇宙学与河外天体物理 · 物理学 2021-10-05 Michelangelo Traina

The era of precision cosmology has revealed that about 85% of the matter in the universe is dark matter. Two well-motivated candidates are weakly interacting massive particles (WIMPs) and weakly interacting sub-eV particles (WISPs) (e.g.…

Two-dimensional topological materials (TMs) have a variety of properties that make them attractive for applications including spintronics and quantum computation. However, there are only a few such experimentally known materials. To help…

材料科学 · 物理学 2020-05-08 Kamal Choudhary , Kevin F. Garrity , Jie Jiang , Ruth Pachter , Francesca Tavazza

Scattering of light dark matter with sub-eV energy deposition can be detected with collective excitations in condensed matter systems. When dark matter has spin-independent couplings to atoms or ions, it has been shown to efficiently excite…

高能物理 - 唯象学 · 物理学 2020-05-27 Tanner Trickle , Zhengkang Zhang , Kathryn M. Zurek

Using density functional theory (DFT)-based calculations, we propose a family of metastable, as-yet unmade V5+ and Cr6+ double perovskite compounds with low band gaps spanning much of the visible region of the solar spectrum. Through…

材料科学 · 物理学 2012-11-07 Robert F. Berger , Jeffrey B. Neaton

Directional detection of Dark Matter particles (DM) in the MeV mass range could be accomplished by studying electron recoils in large arrays of parallel carbon nanotubes. In a scattering process with a lattice electron, a DM particle might…

高能物理 - 唯象学 · 物理学 2018-01-17 G. Cavoto , F. Luchetta , A. D. Polosa

In a previous publication, we showed that a high energy muon collider can make decisive statements about the electroweak (WIMP) Dark Matter (DM), reaching a DM mass which could give the observed thermal relic abundance. In this document, we…

高能物理 - 唯象学 · 物理学 2022-03-15 Tao Han , Zhen Liu , Lian-Tao Wang , Xing Wang

Spin-orbit coupling (SOC), the core of numerous condensed-matter phenomena such as nontrivial band gap, magnetocrystalline anisotropy, etc, is generally considered to be appreciable only in heavy elements, detrimental to the synthetization…

材料科学 · 物理学 2022-02-21 Jiayu Li , Qiushi Yao , Lin Wu , Zongxiang Hu , Boya Gao , Xiangang Wan , Qihang Liu

Direct dark matter searches are promising techniques to identify the nature of dark matter particles. I describe the future of this field of research, focussing on the question of what can be achieved in the next decade. I will present the…

天体物理仪器与方法 · 物理学 2012-12-04 Laura Baudis

Light dark matter in the context of dark sector theories is an attractive candidate for the dark matter thought to make up the bulk of the mass of our universe. We explore here the possibility of using a low-pressure, negative-ion, time…

天体物理仪器与方法 · 物理学 2019-03-27 D. P. Snowden-Ifft , J. L. Harton , N. Ma , F. G. Schuckman

We study the mass fluctuations in gapped Dirac materials by treating the mass-term as both a continuous and discrete random variable. Gapped Dirac materials were proposed to be used as materials for Dark matter sensors. One thus would need…

材料科学 · 物理学 2020-01-22 Bart Olsthoorn , Alexander V. Balatsky

Gas-filled Time Projection Chambers (TPCs) with Gas Electron Multipliers (GEMs) and pixels appear suitable for direction-sensitive WIMP dark matter searches. We present the background and motivation for our work on this technology, past and…

天体物理仪器与方法 · 物理学 2015-05-30 S. E. Vahsen , H. Feng , M. Garcia-Sciveres , I. Jaegle , J. Kadyk , Y. Nguyen , M. Rosen , S. Ross , T. Thorpe , J. Yamaoka

Dirac- and Weyl point- and line-node semimetals are characterized by a zero band gap with simultaneously vanishing density of states. Given a sufficient interaction strength, such materials can undergo an interaction instability, e.g., into…

材料科学 · 物理学 2021-12-10 R. Matthias Geilhufe , Bart Olsthoorn