Weyl semimetal phase in the noncentrosymmetric superlattice 
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Meng, Lijun; Wu, Jiafang; Li, Yi‐Zhi; Zhao, Lingling; Zhong, Jianxin

doi:10.1103/physrevb.100.155151

Cited by 34 publications

(49 citation statements)

References 52 publications

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“…The trap lifetime is similar to previously reported values for ONF based guided mode traps [9,13]. The lifetime is mainly limited by the mechanical modes of the tapered fiber [23] and can be improved using Ramancooling techniques [24].…”

Section: Gratings Interference Filters and Filter Cavitiessupporting

confidence: 87%

Real-Time Observation of Single Atoms Trapped and Interfaced to a Nanofiber Cavity

2019

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We demonstrate an optical tweezer based single atom trapping on an optical nanofiber cavity. We show that the fluorescence of single atoms trapped on the nanofiber cavity can be readily observed in real-time through the fiber guided modes. The photon correlation measurements further clarify the atom number and the dynamics of the trap. The trap lifetime is measured to be 52±5 ms. From the photon statistics measured for different cavity decay rates, the effective coupling rate of the atom-cavity interface is estimated to be 34±2 MHz. This yields a cooperativity of 5.4±0.6 and a cavity enhanced channeling efficiency of 85±2% for a cavity mode having a linewidth of 164 MHz.These results may open new possibilities for building trapped single atom based quantum interfaces on an all-fiber platform.Realizing an efficient quantum interface will enable deterministic control and readout of the quantum states for quantum information processing [1]. In this context, atomic qubits offer unique capabilities for long coherence time and optical interfacing [1,2]. A recent trend towards optical interfacing is to combine the atomic qubits with nanophotonic platforms and develop hybrid quantum systems, where efficient quantum state-transfer between atoms and photons can be realized.Adiabatically tapered single mode optical fiber with subwavelength diameter waist, referred to as optical nanofiber (ONF), provides a unique fiber-in-line platform for quantum photonics applications [3,4]. The transverse confinement of photonic modes in the ONF has enabled new possibilities for manipulating atom-photon interactions [3][4][5][6]. Furthermore, it has been demonstrated that thousands of atoms can be trapped in the vicinity of the ONF by using guided light in a two-color dipole trap scheme [7][8][9]. This inherently leads to a fiber-in-line optically dense platform for quantum non-linear optics with an ensemble of atoms [10,11].On the other hand, for achieving non-linearity at single atom level, the coupling between the atom and the ONF guided modes can be substantially improved by introducing an in-line fiber cavity. Due to the strong transverse confinement of ONF guided modes, one can achieve strong-coupling regime of cavity quantum electrodynamics (QED) and high single atom cooperativity even for a moderate finesse ONF cavity [12]. A detailed review of various types of ONF cavities, can be found in Ref. [4]. Recently, strong-coupling between a trapped single atom and an ONF cavity has been demonstrated [13]. However, the widely adopted scheme of two-color guided mode trapping of atoms on the ONF [7][8][9][10][11]13], is the only scheme so far and it lacks the control over individual atoms. Preparation of quantum emitters on the ONF cavity, in a bottom-up approach using atomby-atom control may open new possibilities to engineer complex quantum systems. Therefore, development of new trapping schemes for atom-ONF interface is essential.Here, we demonstrate an optical tweezer based sideillumination trapping scheme to trap and interface indi-O...

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Section: Gratings Interference Filters and Filter Cavitiessupporting

confidence: 87%

Real-Time Observation of Single Atoms Trapped and Interfaced to a Nanofiber Cavity

2019

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“…Several experimental studies have laid the foundation to chalcogenide compounds for solar cells reporting optical properties and high-temperature stability of the chalcogenides, specifically relevant for the PV applications. [34,72] With all these successful attempts to synthetize chalcogenide ABX 3 perovskite materials, the methods to deposit such materials as a thin film that could be integrated as an absorber into a thin film solar cell structure still need to be further developed. Inspired by the techniques used for kesterite and chalcopyrite solar cells, the preparation of the thin film precursors, based on a mixture or a stack of pure elements, binary sulfides or selenides and/or ternary oxides, should be achievable by conventional thin film deposition techniques, such as RF or DC magnetron sputtering and e-beam evaporation for instance, as illustrated by the method used for the preparation of LaYS 3 thin films.…”

Section: Discussionmentioning

confidence: 99%

Chalcogenide Materials and Derivatives for Photovoltaic Applications

2019

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Chalcogenide AB(S,Se)3 materials have recently attracted increased attention as they could simultaneously solve both the stability and toxicity issues faced by conventional perovskite solar cells. Computer‐aided design of metal chalcogenide semiconductors has experienced important progress over the past few years, leading to the discovery of very promising AB(S,Se)3 compounds and derivatives for application as absorbers in thin‐film photovoltaic devices. Experimental evidence demonstrates that the synthesis of such compounds is possible, confirming the theoretical predictions, although more research work needs to be done to further investigate the optoelectrical properties of the corresponding thin films. With the aim to provide an exhaustive starting point to further develop chalcogenide absorbers and related devices, this Review presents both an overview of the predicted chalcogenide materials and interesting derivatives for thin‐film solar cells applications, as well as a summary of the synthesis techniques developed so far to prepare such materials. The possible challenges that can be encountered during the development of chalcogenide‐based solar cells are also discussed.

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“…[6] In order to rectify the toxicity shortcoming of the organic memory device, the biomaterial is the best choice for safe and sustainable memory technology. Many biomaterials were used as an active layer in the memory devices such as fibroin, [7] egg albumen, [8] lignin, [9] DNA, [10] protein, [11] and many more. However, these devices required large switching voltages and reported endurance and retention are not comparable with conventional inorganic memory devices.…”

Section: Introductionmentioning

confidence: 99%

An Organic Bipolar Resistive Switching Memory Device Based on Natural Melanin Synthesized From Aeromonas sp. SNS

Gurme

Dongale

Surwase

et al. 2018

Physica Status Solidi (a)

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A Ag/melanin/SS memristive device with remarkably good endurance and retention properties is demonstrated using natural melanin isolated from bacterium Aeromonas sp. SNS. Purified and characterized melanin is used for the development of a non‐volatile memory device. The device is operated under electroforming‐free mode and requires only ±0.6 V resistive switching voltage. 2 × 104 switching cycles endurance is achieved with an approximately 10X memory window at 0.2 V read voltage. In addition to this, the low resistance state (LRS) and high resistance state (HRS) are stable over 103 s without any observable degradation in the resistance states. Standard deviation and coefficient of variation of LRS and HRS are very small compared to other memory devices reported in the literature. Furthermore, the Ag/melanin/SS memristive device shows rich nonlinear behavior and possesses negative differential resistance effect during positive bias. Charge transportation in the device is due to the ohmic and space charge limited current. The formation and breaking of the conductive filament are responsible for the bipolar resistive switching effect due to hybrid electronic‐ionic charge transportation. Rich I–V characteristics, very low switching voltage, and remarkable nonvolatile memory performance make melanin a strong candidate for next generation organic non‐volatile memory devices.

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Weyl semimetal phase in the noncentrosymmetric superlattice W2XY(X,Y=S,Se

Cited by 34 publications

References 52 publications

Real-Time Observation of Single Atoms Trapped and Interfaced to a Nanofiber Cavity

Real-Time Observation of Single Atoms Trapped and Interfaced to a Nanofiber Cavity

Chalcogenide Materials and Derivatives for Photovoltaic Applications

An Organic Bipolar Resistive Switching Memory Device Based on Natural Melanin Synthesized From Aeromonas sp. SNS

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