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Magnetotransport properties of a polarization-doped three-dimensional electron slab

Autor: Jena, D., Heikman, S., Speck, J. S., Gossard, A. C., Mishra, U. K., Link, A., Ambacher, O.

We present evidence of strong Shubnikov-de-Haas magnetoresistance oscillations in a polarization-doped degenerate three-dimensional electron slab in an Al$_{x}$Ga$_{1-x}$N semiconductor system. The degenerate free carriers are generated by a novel te

Externí odkaz: http://arxiv.org/abs/cond-mat/0209664

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Realization of wide electron slabs by polarization bulk doping in graded III-V nitride semiconductor alloys

Autor: Jena, Debdeep, Heikman, Sten, Green, Daniel, Yaacov, Ilan B., Coffie, Robert, Xing, Huili, Keller, Stacia, DenBaars, Steve, Speck, James S., Mishra, Umesh K.

We present the concept and experimental realization of polarization-induced bulk electron doping in III-V nitride semiconductors. By exploiting the large polarization charges in the III-V nitrides, we are able to create wide slabs of high density mob

Externí odkaz: http://arxiv.org/abs/cond-mat/0204487

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Akademický článek

Polydrug abuse among opioid maintenance treatment patients is related to inadequate dose of maintenance treatment medicine

Autor: Pertti Kalevi Heikman, Leea Hellevi Muhonen, Ilkka Antero Ojanperä

Publikováno v: BMC Psychiatry, Vol 17, Iss 1, Pp 1-11 (2017)

Abstract Background Polydrug abuse is a known problem among opioid-dependent patients receiving opioid maintenance treatment (OMT). However, improved laboratory diagnostics is required to reveal polydrug abuse in its current scope. Furthermore, there

Externí odkaz: https://doaj.org/article/a39d9c32c2cb45b9a2346b1a11886f26

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Akademický článek

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Akademický článek

Differential response to right unilateral ECT in depressed patients: impact of comorbidity and severity of illness [ISRCTN39974945]

Autor: Wahlbeck Kristian, Sarna Seppo, Katila Heikki, Heikman Pertti, Kuoppasalmi Kimmo

Publikováno v: BMC Psychiatry, Vol 2, Iss 1, p 2 (2002)

Abstract Background Recent electroconvulsive therapy (ECT) efficacy studies of right unilateral (RUL) ECT may not apply to real life clinics with a wide range of patients with major depressive episodes. Methods The study included two groups of patien

Externí odkaz: https://doaj.org/article/4555b4b697fc49189b61ca7b1b7132b2

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