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A Novel Transcriptional Regulator HbERF6 Regulates the HbCIPK2-Coordinated Pathway Conferring Salt Tolerance in Halophytic Hordeum brevisubulatum
2022
Frontiers in Plant Science
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., 2013; Feng et al., 2020) . Previous reports have shown that several ERFs can be phosphorylated by MAPK cascade (Jung et al., 2010; Kishi-Kaboshi et al., 2010) . ...
doi:10.3389/fpls.2022.927253
pmid:35873960
pmcid:PMC9302439
doaj:3f273dddb47847f1a9853b8c3ec6fb92
fatcat:ygapfap26nbcbfjjsn4lo3smgq
Polarization-locked VCSEL with PM f iber pigtail for quantum communication
2012
Chinese Optics Letters (COL)
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Quantum communication is a new technology requiring a stable and reliable laser source for communication security. A new kind of polarization-locked vertical-cavity surface-emitting laser (VCSEL) with polarization maintaining (PM) fiber pigtail is fabricated as a decoy state laser source. The VCSEL is packaged in a standard butterfly box integrated with thermoelectric coder (TEC) and thermistor. The optical pulse width of full-width at half-maximum (FWHM) is smaller than 400 ps with a 100-MHz
doi:10.3788/col201210.101403
fatcat:7qkg74vigra2fg3a5u65ke4qry
more »
... /off modulation frequency. The results reveal that modulation range is better than 4. Moreover, the polarization is stable, and the power extinction ratio is larger than 25. The center wavelength is 850 nm, and the SMSR is better than 40 dB.
Synthesis of θ-Al2O3 Whiskers with Twins
2021
Metals
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In this work, θ-Al2O3 whiskers with twins were successfully fabricated by a hydrothermal method followed by annealing at 1000 °C in argon atmosphere using Al2(SO4)3·18H2O, CO(NH2)2 and PEG2000 as initial materials. It is confirmed that precursor of AlO(OH) whiskers is suitable to be used for preparing alumina whiskers when the molar ratio of Al3+: CO(NH2)2 is selected to be 1:6. The mean length of obtained whiskers is 1.5 μm and the average width is 0.1 μm. Interestingly, it is found that the
doi:10.3390/met11060895
fatcat:jp5isknocbgubdeuowffd6nclu
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... -prepared θ-Al2O3 whiskers consist of twins with (100) plane as the twin surface, which is ascribed to the phase transformation from tetragonal phase (δ-Al2O3) to monoclinic phase (θ-Al2O3) during the annealing. Additionally, the specific surface area of θ-Al2O3 whiskers is measured to be 38.2 m2/g.
Electronic confinement in quantum dots of twisted bilayer graphene
[article]
2021
arXiv
pre-print
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Electronic properties of quantum dots (QDs) depend sensitively on their parent materials. Therefore, confined electronic states in graphene QDs (GQDs) of monolayer and Bernal-stacked bilayer graphene are quite different. Twisted bilayer graphene (TBG) is distinct from monolayer and Bernal-stacked bilayer graphene because of the new degree of freedom: twist angle. In the past few years, numerous efforts have been made to realize the GQDs of monolayer and Bernal-stacked bilayer graphene and
arXiv:2110.10823v1
fatcat:4odebtplcncktecy656ynpjure
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... ed great success. Thus far, however, strategies for realizing GQDs of TBG have been elusive. Here, we demonstrate a general approach for fabricating stationary GQDs of TBG by introducing nanoscale p-n junctions with sharp boundaries in the TBG. We verify the confinement of low-energy massless Dirac fermions via whispering-gallery modes in the GQDs of TBG. Unexpectedly, electronic states around van Hove singularities of the TBG are also strongly modified around the GQDs. Such a feature has never been reported and is attributed to spatial variation of the interlayer coupling in the TBG induced by the GQDs.
Transport study of the wormhole effect in three-dimensional topological insulators
[article]
2020
arXiv
pre-print
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ACKNOWLEDGMENTS We thank Yan-Feng ...
arXiv:2005.11721v1
fatcat:r7uk7eloifainpuszxbw6iyulu
Learning to Regress 3D Face Shape and Expression from an Image without 3D Supervision
[article]
2019
arXiv
pre-print
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Feng et al. benchmark: Feng et al. [10] describe a benchmark dataset for evaluating 3D face reconstruction from single images. ...
Recently, Feng et al. [10] organized a single image to 3D face reconstruction challenge where they provided the ground truth scans for subjects. ...
arXiv:1905.06817v1
fatcat:hlpw2bjnl5dj3gk6zzueckhkdy
Multi-orbital model reveals second-order topological insulator in 1H-transition metal dichalcogenide
[article]
2021
arXiv
pre-print
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Recently, a new class of second-order topological insulators (SOTIs) characterized by an electronic dipole has been theoretically introduced and proposed to host topological corner states. As a novel topological state, it has been attracting great interest and experimentally realized in artificial systems of various fields of physics based on multi-sublattice models, e.g., breathing kagome lattice. In order to realize such kind of SOTI in natural materials, we proposed a symmetry-faithful
arXiv:2108.12855v1
fatcat:pljlocwn4nhrvjmvfpquskfqzm
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... orbital model. Then, we reveal several familiar transition metal dichalcogenide (TMD) monolayers as a material family of two-dimensional SOTI with large bulk gaps. The topologically protected corner state with fractional charge is pinned at Fermi level due to the charge neutrality and filling anomaly. Additionally, we propose that the zero-energy corner state preserves in the heterostructure composed of a topological nontrivial flake embedded in a trivial material. The novel second-order corner states in familiar TMD materials hold promise for revealing unexpected quantum properties and applications.
Novel Phases of Semi-Conducting Silicon Nitride Bilayer: A First-Principle Study
[article]
2017
arXiv
pre-print
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In this paper, we have predicted the stabilities of several two-dimensional phases of silicon nitride, which we name as α-phase, β-phase, and γ-phase, respectively. Both α- and β-phases has formula Si_2N_2, and are consisted of two similar layer of buckled SiN sheet. Similarly, γ-phase is consisted of two puckered SiN sheets. For these phases, the two layers are connected with Si-Si covalent bonds. Transformation between α- and β-phases is difficult because of the high energy barrier. Phonon
arXiv:1707.02819v1
fatcat:vryx77f3vbec3nappprjord7cm
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... ctra of both α- and β-phase suggest their thermodynamic stabilities, because no phonon mode with imaginary frequency is present. By Contrast, γ-phase is unstable because phonon modes with imaginary frequencies are found along Γ-Y path in the Brilliouin zone. Both α- and β-phase are semiconductor with narrow fundamental indirect band gap of 1.7eV and 1.9eV, respectively. As expected, only s and p orbitals in the outermost shells contribute the band structures. The p_z orbitals have greater contribution near the Fermi level. These materials can easily exfoliate to form 2D structures, and may have potential electronic applications.
Towards Racially Unbiased Skin Tone Estimation via Scene Disambiguation
[article]
2022
arXiv
pre-print
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Feng, Y. Xiu for proof-reading, and B. Pellkofer for the technical support. Disclosure:. MJB has received research gift funds from Adobe, Intel, Nvidia, Meta/Facebook, and Amazon. ...
arXiv:2205.03962v2
fatcat:vpjb3wgi3fguxpmlwcfys3khrm
Tunable Anderson metal-insulator transition in quantum spin-Hall insulators
2015
Physical Review B
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We numerically study disorder effects in Bernevig-Hughes-Zhang (BHZ) model, and find that Anderson transition of quantum spin Hall insulator (QSHI) is determined by model parameters. The BHZ Hamiltonian is equivalent to two decoupled spin blocks which belong to the unitary class. In contrast to the common belief that 2D unitary system scales to insulator except at certain critical points, we find, through calculations scaling properties of the localization length, level statistics, and
doi:10.1103/physrevb.91.214202
fatcat:zhmkcpe2gfeg7jhpdz2ub5i4ca
more »
... tion ratio, that a possible exotic metallic phase emerges between QSHI and normal insulator phases in InAs/GaSb-type BHZ model. On the other hand, direct transition from QSHI to normal insulator is found in HgTe/CdTe-type BHZ model. Furthermore, we show that the metallic phase originates from the Berry phase and can survive both inside and outside the gap.
Time and Frequency Injection into a Stabilized Fiber Link for Multi-clock Dissemination Network
[article]
2016
arXiv
pre-print
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Owing to the characteristics of ultra-low loss and anti-electromagnetic interference, using optical fiber to deliver time and frequency signal has been a preferred choice for high precise clock dissemination and comparison. As a brilliant idea, one has been able to reproduce ultra-stable signals from one local station to multiple users. In this paper, we take a step further. A concept of multi-clock (in different locations) dissemination for multi-terminals is presented. By injecting frequency
arXiv:1603.06783v1
fatcat:vbzi3ztrsbaaliesjqhoxgoobu
more »
... ignals into one stabilized ring-like fiber network, the relative stabilities of 3.4e-14@1s for a master clock dissemination and 5.1e-14@1s for a slave clock dissemination have been achieved. The proposed scheme can greatly simplify the future 'N' to 'N' time and frequency dissemination network, especially facing a multi-clock comparison situation.
Edge engineering of a topological Bi(111) bilayer
2014
Physical Review B
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2014 pre-print arXiv:1403.0147v1 fatcat:wu42f7slobeehepfscxyp7ft7u
A topological insulator is a novel quantum state, characterized by symmetry-protected non-trivial edge/surface states. Our first-principle simulations show the significant effects of the chemical decoration on edge states of topological Bi(111) bilayer nanoribbon, which remove the trivial edge state and recover the Dirac linear dispersion of topological edge state. By comparing the edge states with and without chemical decoration, the Bi(111) bilayer nanoribbon offers a simple system for
doi:10.1103/physrevb.90.165412
fatcat:jtd6saozbrc2nnc7sgylpzgcqi
more »
... ng conductance fluctuation of edge states. The chemical decoration can also modify the penetration depth and the spin texture of edge states. A low-energy effective model is proposed to explain the distinctive spin texture of Bi(111) bilayer nanoribbon, which breaks the spin-momentum orthogonality along the armchair edge.
On Fairness in Face Albedo Estimation
2022
Special Interest Group on Computer Graphics and Interactive Techniques Conference Talks
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In particular, we examine the results recently presented in [Feng et al. 2022 ]. ...
In [Feng et al. 2022 ] we additionally proposed a set of metrics targeting specifically the problem of fair albedo estimation. ...
doi:10.1145/3532836.3536281
fatcat:b2l4l73ffbcbjli7jgpeix72ei
Topological Imbert-Fedorov Shift in Weyl Semimetals
2015
Physical Review Letters
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2015 pre-print arXiv:1501.06535v1 fatcat:xcyu6ddj2bhbhdy3lx5g4gu3da
The Goos-H\"anchen (GH) shift and the Imbert-Fedorov (IF) shift are optical phenomena which describe the longitudinal and transverse lateral shifts at the reflection interface, respectively. Here, we report the GH and IF shifts in Weyl semimetals (WSMs) - a promising material harboring low energy Weyl fermions, a massless fermionic cousin of photons. Our results show that GH shift in WSMs is valley-independent which is analogous to that discovered in a 2D relativistic material - graphene.
doi:10.1103/physrevlett.115.156602
pmid:26550742
fatcat:n32jnxaccveybbvt36ld4nzevu
more »
... r, the IF shift has never been explored in non-optical systems, and here we show that it is valley-dependent. Furthermore, we find that the IF shift actually originates from the topological effect of the system. Experimentally, the topological IF shift can be utilized to characterize the Weyl semimetals, design valleytronic devices of high efficiency, and measure the Berry curvature.
Tunable Anderson metal-insulator transition in quantum-spin Hall insulators
[article]
2015
arXiv
pre-print
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We numerically study disorder effects in Bernevig-Hughes-Zhang (BHZ) model, and find that Anderson transition of quantum spin-Hall insulator (QSHI) is determined by model parameters. The BHZ Hamiltonian is equivalent to two decoupled spin blocks that belong to the unitary class. In contrast to the common belief that a two-dimensional unitary system scales to an insulator except at certain critical points, we find, through calculations scaling properties of the localization length, level
arXiv:1504.04172v2
fatcat:lmewr57zf5cqrekzhdvdvn3jcu
more »
... cs, and participation ratio, that a possible exotic metallic phase emerges between a QSHI and a normal insulator phases in InAs/GaSb-type BHZ model. On the other hand, direct transition from a QSHI to a normal insulator is found in HgTe/CdTe-type BHZ model. Furthermore, we show that the metallic phase originates from the Berry phase and can survive both inside and outside the gap.
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