ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

11

Digitale Medien

Photoreflectance and photoluminescence spectroscopy of the lattice-matched InGaAs/InAlAs single quantum well (2002)

Wang, Y. C.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 92 (2002), S. 920-926

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: A lattice-matched In0.53Ga0.47As/In0.52Al0.48As single quantum well (SQW) structure grown by gas source molecular beam epitaxy has been investigated by photoreflectance (PR) and photoluminescence (PL). The PR measurements allowed the observation of interband transitions from the heavy- and light-hole valence subbands to the conduction subbands. The transition energies measured from the PR spectra agree with those calculated theoretically. Two features corresponding to the ground state transition coming from the SQW and the band gap transition generated from the buffer layer are observed in the PL spectra and are in good agreement with the PR data. The effect of the temperature on the transition energies is essentially same as that in the gap transition of the bulk structure. The values of the Varshni coefficients of InGaAs/InAlAs were obtained from the relation between the exciton transition energy and the temperature. The built-in electric field could be determined and located from a series of PR spectra by sequential etching processes. The phase spectra obtained from the PR spectra by the Kramers–Kronig transformation were analyzed in terms of the two-ray model, and calculated the etching depth in each etching, and thus leading to the etching rate. The etching rate obtained from phase shift analysis agrees with that measured by atomic force microscopy. The etching results suggest that a built-in electric field exists at the buffer/substrate interface and it also enables us to determine the etching rate. © 2002 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1487906

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

12

Digitale Medien

Hall measurements as a function of temperature on monocrystalline SiC thin films (1990)

Tachibana, T. ; Kong, H. S. ; Wang, Y. C. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 67 (1990), S. 6375-6381

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: Hall measurements were conducted at temperatures up to 1000 K on unintentionally doped n-type β(3C)- and α(6H)-SiC thin films epitaxially grown on both on-axis and vicinal Si (100) and α(6H)-SiC (0001) by chemical vapor deposition. The carrier concentration versus temperature data were analyzed using a compensation model. The β-SiC films grown on Si were highly compensated (NA/ND=0.73–0.98). The compensation ratio was not as large in the SiC films grown on α-SiC (NA/ND=0.36, for β-SiC on α-SiC, and 0.02, for α-SiC on α-SiC). The donor ionization energy for β-SiC on Si was calculated to be 14–21 meV. Analogous values for β- and α-SiC films on α-SiC were 33 and 84 meV, respectively. These values are smaller than those for N determined from photoluminescence studies.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.345159

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

13

Digitale Medien

New evidence on the earliest human presence at high northern latitudes in northeast Asia (2004)

Xie, F. ; Hoffman, K. A. ; Deng, C. L. ; [weitere]

[s.l.] : Macmillian Magazines Ltd.

Nature 431 (2004), S. 559-562

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] The timing of early human dispersal to Asia is a central issue in the study of human evolution. Excavations in predominantly lacustrine sediments at Majuangou, Nihewan basin, north China, uncovered four layers of indisputable hominin stone tools. Here we report magnetostratigraphic results that ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/nature02829

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

14

Digitale Medien

Extreme damping in composite materials with negative-stiffness inclusions (2001)

Lee, T. ; Bersie, A. ; Wang, Y. C. ; [weitere]

[s.l.] : Macmillian Magazines Ltd.

Nature 410 (2001), S. 565-567

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] When a force deforms an elastic object, practical experience suggests that the resulting displacement will be in the same direction as the force. This property is known as positive stiffness. Less familiar is the concept of negative stiffness, where the deforming force and the resulting ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/35069035

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

15

Digitale Medien

Gigantic jets between a thundercloud and the ionosphere (2003)

Hsu, R. R. ; Chen, A. B. ; Wang, Y. C. ; [weitere]

[s.l.] : Macmillian Magazines Ltd.

Nature 423 (2003), S. 974-976

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Transient luminous events in the atmosphere, such as lighting-induced sprites and upwardly discharging blue jets, were discovered recently in the region between thunderclouds and the ionosphere. In the conventional picture, the main components of Earth's global electric circuit include ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/nature01759

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

16

Digitale Medien

Organization and nucleotide sequence of carp gonadotropin α subunit genes

Huang, C.-J. ; Huang, F.-L. ; Wang, Y.-C. ; [weitere]

Amsterdam : Elsevier

Biochimica et Biophysica Acta (BBA)/Gene Structure and Expression 1129 (1992), S. 239-242

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0167-4781

Schlagwort(e): (Cyprinus carpio) ; Glycoprotein hormone ; Intron-exon boundary ; Molecular evolution ; Recombinant DNA

Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Thema: Biologie , Chemie und Pharmazie , Medizin , Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1016/0167-4781(92)90496-M

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

17

Digitale Medien

High-performance liquid chromatography of inorganic mercury and organomercury with 2-mercaptobenzothiazole

Wang, Y.-C. ; Whang, C.-W.

Amsterdam : Elsevier

Journal of Chromatography A 628 (1993), S. 133-137

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0021-9673

Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Thema: Chemie und Pharmazie

Materialart: Digitale Medien

URL: http://linkinghub.elsevier.com/retrieve/pii/0021-9673(93)80340-E

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

18

Digitale Medien

Small-signal characteristics of a read diode under conditions of field-dependent velocity and finite reverse saturation current

Wang, Y.-c.

Amsterdam : Elsevier

Solid State Electronics 21 (1978), S. 609-615

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0038-1101

Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik

Materialart: Digitale Medien

URL: http://linkinghub.elsevier.com/retrieve/pii/0038-1101(78)90325-8

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

19

Digitale Medien

Subcellular distribution and immunocytochemical localization of protein kinase C in myocardium, and phosphorylation of troponin in isolated myocytes stimulated by isoproterenol or phorbol ester

Liu, J.D. ; Wood, J.G. ; Raynor, R.L. ; [weitere]

Amsterdam : Elsevier

Biochemical and Biophysical Research Communications 162 (1989), S. 1105-1110

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0006-291X

Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Thema: Biologie , Chemie und Pharmazie , Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1016/0006-291X(89)90787-0

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

20

Digitale Medien

Cascade stimulated emission in the sodium dimer

Wang, Z.-G. ; Wang, Y.-C. ; Morgan, G.P. ; [weitere]

Amsterdam : Elsevier

Optics Communications 48 (1984), S. 398-402

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0030-4018

Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Thema: Physik

Materialart: Digitale Medien

URL: http://linkinghub.elsevier.com/retrieve/pii/0030-4018(84)90032-4

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext