Search Results - "Kwok, W. K"

Room-Temperature Large and Reversible Modulation of Photoluminescence by in Situ Electric Field in Ergodic Relaxor Ferroelectrics by Sun, Hailing, Wu, Xiao, Peng, Deng Feng, Kwok, K. W

“…Ferroelectric oxides with luminescent ions hold great promise in future optoelectronic devices because of their unique photoluminescence and inherent…”
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Superconducting and normal-state anisotropy of the doped topological insulator Sr0.1Bi2Se3 by Smylie, M. P., Willa, K., Claus, H., Koshelev, A. E., Song, K. W., Kwok, W.-K., Islam, Z., Gu, G. D., Schneeloch, J. A., Zhong, R. D., Welp, U.

“…Sr x Bi 2 Se 3 and the related compounds Cu x Bi 2 Se 3 and Nb x Bi 2 Se 3 have attracted considerable interest, as these materials may be realizations of…”
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Emission of Coherent THz Radiation from Superconductors by Ozyuzer, L, Koshelev, A.E, Kurter, C, Gopalsami, N, Li, Q, Tachiki, M, Kadowaki, K, Yamamoto, T, Minami, H, Yamaguchi, H, Tachiki, T, Gray, K.E, Kwok, W.-K, Welp, U

“…Compact solid-state sources of terahertz (THz) radiation are being sought for sensing, imaging, and spectroscopy applications across the physical and…”
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Rapid doubling of the critical current of YBa2Cu3O7−δ coated conductors for viable high-speed industrial processing by Leroux, M., Kihlstrom, K. J., Holleis, S., Rupich, M. W., Sathyamurthy, S., Fleshler, S., Sheng, H. P., Miller, D. J., Eley, S., Civale, L., Kayani, A., Niraula, P. M., Welp, U., Kwok, W.-K.

“…We demonstrate that 3.5-MeV oxygen irradiation can markedly enhance the in-field critical current of commercial second generation superconducting tapes with an…”
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Magnetic gates and guides for superconducting vortices by Vlasko-Vlasov, V. K., Colauto, F., Buzdin, Alexandre I., Rosenmann, D., Benseman, T., Kwok, W.-K.

“…We image the motion of superconducting vortices in niobium film covered with a regular array of thin permalloy strips. By altering the magnetization…”
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Self-assembled magnetic surface swimmers by Snezhko, A, Belkin, M, Aranson, I S, Kwok, W-K

“…We report studies of novel self-assembled magnetic surface swimmers (magnetic snakes) formed from a dispersion of magnetic microparticles at a liquid-air…”
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Triode for Magnetic Flux Quanta by Vlasko-Vlasov, V. K., Colauto, F., Benseman, T., Rosenmann, D., Kwok, W.-K.

“…In an electronic triode, the electron current emanating from the cathode is regulated by the electric potential on a grid between the cathode and the anode…”
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Hydrogen Gas Sensing with Networks of Ultrasmall Palladium Nanowires Formed on Filtration Membranes by Zeng, X. Q, Latimer, M. L, Xiao, Z. L, Panuganti, S, Welp, U, Kwok, W. K, Xu, T

“…Hydrogen sensors based on single Pd nanowires show promising results in speed, sensitivity, and ultralow power consumption. The utilization of single Pd…”
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Upconversion fluorescence studies of sol–gel-derived Er-doped KNN ceramics by Wu, Xiao, Kwok, K.W., Li, Faliang

“…•A sol–gel method is used to prepare the Er-doped KNN luminescent ceramics.•The ceramics exhibit luminescent bands at 487, 527, 548 and 660nm,…”
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Manipulating Abrikosov vortices with soft magnetic stripes by Vlasko-Vlasov, V. K., Colauto, F., Buzdin, Alexandre I., Rosenmann, D., Benseman, T., Kwok, W.-K.

“…Tuning the polarization of a periodic array of magnetic stripes on top of a superconducting film allows control of Abrikosov vortex motion. Using direct…”
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Observing the Suppression of Superconductivity in RbEuFe4As4 by Correlated Magnetic Fluctuations by Collomb, D, Bending, S J, Koshelev, A E, Smylie, M P, Farrar, L, Bao, J-K, Chung, D Y, Kanatzidis, M G, Kwok, W-K, Welp, U

“…In this Letter, we describe quantitative magnetic imaging of superconducting vortices in RbEuFe4As4 in order to investigate the unique interplay between the…”
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Magnetic circuit for Abrikosov vortices: Vortex motion in a periodic labyrinth of magnetic T and I-shaped elements under a superconducting film by Vlasko-Vlasov, V.K., Rydh, A., Divan, R., Rosenmann, D., Glatz, A., Kwok, W.-K.

“…•We directly imaged Abrikosov vortex motion in a hybrid structure of soft magnetic T- and I-shaped patterns, similar to those used in bubble domain memories,…”
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Crossing fields in thin films of isotropic superconductors by Vlasko-Vlasov, V. K., Colauto, F., Buzdin, Alexandre I., Carmo, D., Andrade, A. M. H., Oliveira, A. A. M., Ortiz, W. A., Rosenmann, D., Kwok, W.K

“…We study interactions of perpendicular and longitudinal magnetic fields in niobium films of different thickness in a wide range of temperatures below the…”
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Spatial deviations of the temporomandibular joint after oncological mandibular reconstruction by Yang, W.-F., Choi, W.S., Zhu, W.-Y., Zhang, C.-Y., Li, D.T.S., Tsoi, J.K.-H., Tang, A.W.-L., Kwok, K.-W., Su, Y.-X.

“…Spatial deviations of the temporomandibular joint (TMJ) after oncological mandibular reconstruction are important to the aesthetic and functional…”
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Direct observation of tetrahertz electromagnetic waves emitted from intrinsic Josephson junctions in single crystalline Bi2Sr2CaCu2O8+δ by Kadowaki, K., Yamaguchi, H., Kawamata, K., Yamamoto, T., Minami, H., Kakeya, I., Welp, U., Ozyuzer, L., Koshelev, A., Kurter, C., Gray, K.E., Kwok, W.-K.

“…We have observed intense, coherent, continuous and monochromatic electromagnetic (EM) emission at terahertz frequencies generated from a single crystalline…”
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High-field critical current enhancement by irradiation induced correlated and random defects in (Ba0.6K0.4)Fe2As2 by Kihlstrom, K. J., Fang, L., Jia, Y., Shen, B., Koshelev, A. E., Welp, U., Crabtree, G. W., Kwok, W.-K., Kayani, A., Zhu, S. F., Wen, H.-H.

“…Mixed pinning landscapes in superconductors are emerging as an effective strategy to achieve high critical currents in high, applied magnetic fields. Here, we…”
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Characterization of the Thermal Properties of Ir/Pt Bilayer Transition Edge Sensors by Zhang, J., Chang, C. L., Fujikawa, B., Karapetrov, G., Kolomensky, Yu. G., Kwok, W. -K., Lisovenko, M., Novosad, V., Pearson, J., Singh, V., Wang, G., Welliver, B., Welp, U., Yefremenko, V. G.

“…We are developing a low- T c TES-based large-area and low-threshold detector targeting a variety of potential applications. The detector consists of a…”
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Large magnetoresistance oscillations in mesoscopic superconductors due to current-excited moving vortices by Berdiyorov, G R, Milošević, M V, Latimer, M L, Xiao, Z L, Kwok, W K, Peeters, F M

“…We show in the case of a superconducting Nb ladder that a mesoscopic superconductor typically exhibits magnetoresistance oscillations whose amplitude and…”
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Large spin-orbit coupling and helical spin textures in 2D heterostructure [Pb2BiS3][AuTe2] by Fang, L., Im, J., DeGottardi, W., Jia, Y., Glatz, A., Matveev, K. A., Kwok, W.-K., Crabtree, G. W., Kanatzidis, M. G.

“…Two-dimensional heterostructures with strong spin-orbit coupling have direct relevance to topological quantum materials and potential applications in…”
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Direct observation of geometrical phase transitions in mesoscopic superconductors by scanning tunneling microscopy by KARAPETROV, G, FEDOR, J, IAVARONE, M, ROSENMANN, D, KWOK, W. K

“…Using scanning tunneling microscopy, we mapped the distribution of the local density of states in a single crystal superconductor heterostructure with an array…”
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