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Your search keyword '"Wang, N.L."' showing total 140 results
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140 results on '"Wang, N.L."'

12. Nearly isotropic superconductivity in (Ba,K)[Fe.sub.2][As.sub.2]

Author

Yuan, H.Q., Singleton, J., Balakirev, F.F., Bailey, S.A., Chen, G.F., Luo, J.L., and Wang, N.L.

Subjects
Transition state (Chemistry) -- Evaluation -- Research, Superconductivity -- Research, Iron -- Properties -- Evaluation, Arsenic -- Properties -- Evaluation, Environmental issues, Science and technology, Zoology and wildlife conservation, Evaluation, Research, Properties
Abstract

Superconductivity was recently observed (1-7) in iron-arsenic-based compounds with a superconducting transition temperature ([T.sub.c]) as high as 56 K, naturally raising comparisons with the high-[T.sub.c] copper oxides. The copper oxides [...]

Published
2009

13. Magnetic order close to superconductivity in the iron-based layered La[O.sub.1-x][F.sub.x]FeAs systems

Author

de la Cruz, Clarina, Huang, Q., Lynn, J.W., Li, Jiying, Ratcliff, II, W., Zarestky, J.L., Mook, H.A., Chen, G.F., Luo, J.L., Wang, N.L., and Dai, Pengcheng

Subjects
Superconductors -- Magnetic properties, Environmental issues, Science and technology, Zoology and wildlife conservation, Magnetic properties
Abstract

Following the discovery of long-range antiferromagnetic order in the parent compounds of high-transition-temperature (high-[T.sub.c]) copper oxides (1,2), there have been efforts to understand the role of magnetism in the superconductivity [...]

Published
2008

15. Down-regulation of prostate specific antigen in LNCaP cells by flavonoids from the pollen of Brassica napus L

Author

Han, H.Y., Shan, S., Zhang, X., Wang, N.L., Lu, X.P., and Yao, X.S.

Subjects
Bioflavonoids -- Research -- Health aspects, Flavones -- Research -- Health aspects, Prostate cancer -- Care and treatment -- Research, Rape (Plant) -- Research -- Health aspects, Medicinal plants -- Research -- Health aspects, Flavonoids -- Research -- Health aspects, Biological sciences, Health, Science and technology
Abstract

Abstract The pollen of Brassica napus L. has been used in China to treat benign prostatic hyperplasia (BPH) for over decades. In this study, the pollen of Brassica napus L. [...]

Published
2007

19. Optimum design for a thermally stable multifinger power transistor

Author

Liao, Chih-Hao, Lee, Chien-Ping, Wang, N.L., and Lin, B.

Subjects
Power transistors -- Electric properties, Circuit design -- Testing, Circuit designer, Integrated circuit design, Business, Electronics, Electronics and electrical industries
Abstract

Multiple-finger transistors with nonuniform distribution of ballasting resistors are analyzed. Analytical formulas for the best ballasting resistor distribution for optimum thermal stability operation were derived.

Published
2002

22. Evidence for nesting-driven charge density wave instabilities in the quasi-two-dimensional material LaAgSb2

Author

Bosak, A., Souliou, S.M., Faugeras, C., Heid, R., Molas, M.R., Chen, R.Y., Wang, N.L., Potemski, M., and Le Tacon, M.

Subjects
Condensed Matter::Strongly Correlated Electrons
Abstract

Since their theoretical prediction by Peierls in the 1930s, charge density waves (CDWs have been one of the most commonly encountered electronic phases in low-dimensional metallic systems. The instability mechanism originally proposed combines Fermi surface nesting and electron-phonon coupling but is, strictly speaking, only valid in one dimension. In higher dimensions, its relevance is questionable as sharp maxima in the static electronic susceptibility χ(q) are smeared out, and is, in many cases, unable to account for the periodicity of the observed charge modulations. Here, we investigate the quasi-two-dimensional LaAgSb2, which exhibits two CDW transitions, by a combination of diffuse x-ray scattering, inelastic x-ray scattering, and ab initio calculations. We demonstrate that the CDW formation is driven by phonon softening. The corresponding Kohn anomalies are visualized in three dimensions through the momentum distribution of the x-ray diffuse scattering intensity. We show that they can be quantitatively accounted for by considering the electronic susceptibility calculated from a Dirac-like band, weighted by anisotropic electron-phonon coupling. This remarkable agreement sheds new light on the importance of Fermi surface nesting in CDW formation.

Published
2021

25. Electrical and optical response of a very high frequency AlGaAs/GaAs heterojunction bipolar transistor

Author

Martin, M.Z., Oshita, F.K., Matloubian, M., Fetterman, H.R., Ho, W.J., Wang, N.L., Chang, F., and Cheung, D.

Subjects
Bipolar transistors -- Research, Physics
Abstract

Measurement of current gain cutoff frequency in very high frequency AlGaAs/GaAs heterojunction bipolar transistors indicates the existence of cutoff frequencies at 72 ad 84 giga hertz at room and at fixture temperature of 20 Kelvin, respectively. The gain cutoff frequency is measured at 20 and 300 Kelvin by picosecond optoelectronics. Visible optical response of the transistors indicates that the FWHM has a value of 14 and 95 ps at 300 and 20 Kelvin, respectively. Infrared optical response indicates that the FWHM is greater than 50 ps.

Published
1994

40. Low-temperature normal-state resistivity of high-Tc cuprates

Author

Ando, Yoichi, primary, Boebinger, G.S., additional, Passner, A., additional, Wang, N.L., additional, Geibel, C., additional, Steglich, F., additional, Kimura, T., additional, Okuya, M., additional, Shimoyama, J., additional, Kishio, K., additional, Tamasaku, K., additional, Ichikawa, N., additional, and Uchida, S., additional

Published
1997
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