In the framework of 2HDM, we explore the wrong-sign Yukawa region with direct and indirect searches up to one-loop level. The direct searches include the latest
H
/
A
→
f
f
¯
,
V
V
,
V
h
,
h
h
...reports at current LHC, and the study of indirect Higgs precision measurements works with current LHC, future HL-LHC and CEPC. At tree level of Type-II 2HDM, for degenerate heavy Higgs mass
m
A
=
m
H
=
m
H
±
<
800
GeV, the wrong-sign Yukawa regions are excluded largely except for the tiny allowed region around
cos
(
β
-
α
)
∈
(
0.2
,
0.3
)
under the combined Higgs constraints. The excluded region is also nearly independent of parameter
m
12
or
λ
v
2
=
m
A
2
-
m
12
2
/
(
sin
β
cos
β
)
. The situation changes a lot after including loop corrections to the indirect searches, for example
m
A
=
1500
GeV
, the region with
λ
v
2
<
0
will be stronger constrained to be totally excluded. Whilst parameter space with
λ
v
2
>
0
would get larger survived wrong-sign region for
m
A
=
800
GeV
compared to it at tree level. We also conclude Higgs direct searches works better on constraining
λ
v
2
≈
0
GeV range than theoretical constraints. We also find that the loop-level wrong-sign Yukawa limit only occurs at mass decoupling scale.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Secondary exposure to e‐cigarette aerosol (passive vaping) will soon become a pressing public health issue in the world. Yet, the current knowledge about respiratory depositions of e‐cigarette ...aerosol through passive vaping in human airways is limited due to critical weaknesses of traditional experimental methods. To fill in this important knowledge gap, this study proposed a special approach involving an upgraded Mobile Aerosol Lung Deposition Apparatus (MALDA) that consists of a set of human airway replicas including a head airway, tracheobronchial airways down to the 11th lung generation, and a representative alveolar section. In addition to the comprehensive coverage of human airways, the MALDA is easily transportable for providing efficient estimations of aerosol respiratory deposition. In this study, the MALDA was first evaluated in the laboratory and then applied to estimate the respiratory deposition associated with passive vaping in an indoor real‐life setting. The results showed that the respiratory deposition data aligned closely with the conventional respiratory deposition curves not only in the head‐to‐TB region but also in the alveolar region. The strengths of MALDA demonstrate great promise for a wide variety of applications in real‐life settings that could provide crucial information for future public health and indoor air quality studies.
Hybrid halide perovskites such as methylammonium lead iodide (CH3NH3PbI3) exhibit unusually low free‐carrier concentrations despite being processed at low‐temperatures from solution. We demonstrate, ...through quantum mechanical calculations, that an origin of this phenomenon is a prevalence of ionic over electronic disorder in stoichiometric materials. Schottky defect formation provides a mechanism to self‐regulate the concentration of charge carriers through ionic compensation of charged point defects. The equilibrium charged vacancy concentration is predicted to exceed 0.4 % at room temperature. This behavior, which goes against established defect conventions for inorganic semiconductors, has implications for photovoltaic performance.
Missing ion action: Schottky defects are found to be a dominant mode of equilibrium stoichiometric disorder in the photovoltaic material CH3NH3PbI3. This behavior can explain the previous finding that “the compounds show intense color, but there is no significant conductivity”.
Van der Waals heterostructures designed by assembling isolated two‐dimensional (2D) crystals have emerged as a new class of artificial materials with interesting and unusual physical properties. ...Here, the multilayer MoS2–WS2 heterostructures with different configurations are reported and their optoelectronic properties are studied. It is shown that the new heterostructured material possesses new functionalities and superior electrical and optoelectronic properties that far exceed the one for their constituents, MoS2 or WS2. The vertical transistor exhibits a novel rectifying and bipolar behavior, and can also act as photovoltaic cell and self‐driven photodetector with photo‐switching ratio exceeding 103. The planar device also exhibits high field‐effect ON/OFF ratio (>105), high electron mobility of 65 cm2/Vs, and high photoresponsivity of 1.42 A/W compared to that in isolated multilayer MoS2 or WS2 nanoflake transistors. The results suggest that formation of MoS2–WS2 heterostructures could significantly enhance the performance of optoelectronic devices, thus open up possibilities for future nanoelectronic, photovoltaic, and optoelectronic applications.
Newly designed MoS
2
–WS
2
heterostructures perform novel and enhanced optoelectronic performances. Vertical transistors possess new functionalities such as rectifying, bipolarity, photovoltaic effect, and self‐driven photodetection. Planar devices exhibit superior optoelectronic properties with high field‐effect ON/OFF ratio (>105), electron mobility of 65 cm2/Vs, and photoresponsivity of 1.42 A/W that far exceed the one for their constituents MoS2 or WS2.
Lithium-ion batteries, simply known as lithium batteries, are distinct among high energy density charge-storage devices. The power delivery of batteries depends upon the electrochemical performances ...and the stability of the electrode, electrolytes and their interface. Interfacial phenomena of the electrode/electrolyte involve lithium dendrite formation, electrolyte degradation and gas evolution, and a semi-solid protective layer formation at the electrode-electrolyte interface, also known as the solid-electrolyte interface (SEI). The SEI protects electrodes from further exfoliation or corrosion and suppresses lithium dendrite formation, which are crucial needs for enhancing the cell performance. This review covers the compositional, structural and morphological aspects of SEI, both artificially and naturally formed, and metallic dendrites using
in situ
/
in operando
cells and various
in situ
analytical tools. Critical challenges and the historical legacy in the development of
in situ
/
in operando
electrochemical cells with some reports on state-of-the-art progress are particularly highlighted. The present compilation pinpoints the emerging research opportunities in advancing this field and concludes on the future directions and strategies for
in situ
/
in operando
analysis.
Interface is a key to high performance and safe lithium-ion batteries or lithium batteries.
A four-port ultra-compact plasmonic splitting filter based on graphene diamond ring resonator is proposed and investigated by using the finite-difference time-domain method. Numerical simulation ...results show that the transmission spectra can be affected by the structural parameters and the chemical potential of graphene. Especially, the resonant frequencies can be easily manipulated by changing bias voltage without changing the dimension parameters of the filter. The simple structure that consists of graphene nanoribbon waveguides and a graphene resonator shows both splitting and filtering capability. This compact intersection structure has potential applications in highly integrated optical circuits for terahertz frequency.
Over the past few years, halide solid‐state electrolytes (HSSEs) have attracted the attention of researchers, and many reports about HSSEs have been published. Their wide electrochemical window (ECW) ...and a quite good compatibility with the popular oxide cathode materials make them attractive for practical applications. As a result, HSSEs are exciting candidates for the future generation of all‐solid‐state Li batteries (ASSLBs). In recent years, noticeable efforts have been made to develop novel HSSEs and utilize them in ASSLBs. Herein, a comprehensive update on the progress of HSSEs development and their application in ASSLBs is provided. First, a brief summary of the conductivity of HSSEs and potential synthesis approaches is provided. Next, the moisture and phase stabilities of HSSEs are reviewed separately, and the techniques proposed in the recently published reports to achieve sufficient stabilities are summarized. In addition, the electrochemical stabilities of HSSEs with Li metal anode and oxide cathode materials, from experimental and theoretical points of view, are provided in parallel. Furthermore, the application and progress of HSSEs in high‐voltage ASSLBs are discussed. Finally, new research directions are suggested for the development of scalable HSSEs‐based ASSLBs.
Halide solid‐state electrolytes (HSSEs) offer outstanding electrochemical stability and excellent solid–solid contacts, making them a possible game changer for developing all‐solid‐state Li batteries (ASSLBs). In this review, the significant advantages, challenges, and opportunities of halide‐based ASSLBs are presented. Their outstanding stability at high voltage with good ionic conductivity is expected to lead to the realization of highly attractive ASSLBs.
Two-dimensional (2D) semiconductors have shown great potential for electronic and optoelectronic applications. However, their development is limited by a large Schottky barrier (SB) at the ...metal-semiconductor junction (MSJ), which is difficult to tune by using conventional metals because of the effect of strong Fermi level pinning (FLP). We show that this problem can be overcome by using 2D metals, which are bounded with 2D semiconductors through van der Waals (vdW) interactions. This success relies on a weak FLP at the vdW MSJ, which is attributed to the suppression of metal-induced gap states. Consequently, the SB becomes tunable and can vanish with proper 2D metals (for example, H-NbS2). This work not only offers new insights into the fundamental properties of heterojunctions but also uncovers the great potential of 2D metals for device applications.
Although 5-methylcytosine (m
C) is a widespread modification in RNAs, its regulation and biological role in pathological conditions (such as cancer) remain unknown. Here, we provide the ...single-nucleotide resolution landscape of messenger RNA m
C modifications in human urothelial carcinoma of the bladder (UCB). We identify numerous oncogene RNAs with hypermethylated m
C sites causally linked to their upregulation in UCBs and further demonstrate YBX1 as an m
C 'reader' recognizing m
C-modified mRNAs through the indole ring of W65 in its cold-shock domain. YBX1 maintains the stability of its target mRNA by recruiting ELAVL1. Moreover, NSUN2 and YBX1 are demonstrated to drive UCB pathogenesis by targeting the m
C methylation site in the HDGF 3' untranslated region. Clinically, a high coexpression of NUSN2, YBX1 and HDGF predicts the poorest survival. Our findings reveal an unprecedented mechanism of RNA m
C-regulated oncogene activation, providing a potential therapeutic strategy for UCB.
Strain‐gated flexible optoelectronics are reported based on monolayer MoS2. Utilizing the piezoelectric polarization created at the metal‐MoS2 interface to modulate the separation/transport of ...photogenerated carriers, the piezophototronic effect is applied to implement atomic‐layer‐thick phototransistor. Coupling between piezoelectricity and photogenerated carriers may enable the development of novel optoelectronics.
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