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Allen M. Hermann
Researcher at University of Arkansas
Publications - 54
Citations - 3798
Allen M. Hermann is an academic researcher from University of Arkansas. The author has contributed to research in topics: Superconductivity & High-temperature superconductivity. The author has an hindex of 21, co-authored 54 publications receiving 3721 citations. Previous affiliations of Allen M. Hermann include MRIGlobal & University of Arkansas at Little Rock.
Papers
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Journal ArticleDOI
Bulk superconductivity at 120 K in the Tl-Ca/Ba-Cu-O system
Z.Z. Sheng,Allen M. Hermann +1 more
TL;DR: In this paper, stable and reproducible bulk superconductivity with an onset at 120 K and zero resistance above 100 K in the Tl-Ca/Ba-Cu-O system was reported.
Journal ArticleDOI
Superconductivity in the rare-earth-free Tl–Ba–Cu–O system above liquid-nitrogen temperature
Z.Z. Sheng,Allen M. Hermann +1 more
TL;DR: In this paper, the authors reported superconductivity in the rare earth-free TI-Ba-Cu-O system with a resistance starting at 90 K with zero resistance at 81 K.
Journal ArticleDOI
High-efficiency cuinxga1-xse2 solar cells made from (inx,ga1-x)2se3 precursor films
Andrew M. Gabor,John R. Tuttle,David S. Albin,Miguel A. Contreras,Rommel Noufi,Allen M. Hermann +5 more
TL;DR: In this paper, Ga and Se were coevaporated to form precursor films of (Inx,Ga1−x)2Se3, which were then converted to CuInxGa 1−xSe2 by exposure to a flux of Cu and Se. The final films were smooth, with tightly packed grains, and had a graded Ga content as a function of film depth.
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100-K superconducting phases in the Tl-Ca-Ba-Cu-O system.
Robert M. Hazen,Larry W. Finger,Ross J. Angel,Charles T. Prewitt,Nancy L. Ross,C. G. Hadidiacos,Peter J. Heaney,David R. Veblen,Z.Z. Sheng,A. El Ali,Allen M. Hermann +10 more
TL;DR: Two superconducting phases, Tl-Ca-Ba-Cu-O system and 2122, both with onset T/sub c/ near 120 K and zero resistivity at 100 K, have been isolated from samples in the Tl/ sub 2/Ca/sub 1/Ba/sub 2/Cu/sub 3/O/sub 10/..mu../sub delta/ system.
Journal ArticleDOI
Superconductivity at 90 K in the Tl-Ba-Cu-O system.
TL;DR: Stable and reproducible superconductivity has been unambiguously observed in a new Tl-Ba-Cu-O system containing no group-IIIB elements and further substitutions of elements for this system may lead to even higher-temperature superconductors.