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A. E. Koshelev
Researcher at Argonne National Laboratory
Publications - 95
Citations - 2752
A. E. Koshelev is an academic researcher from Argonne National Laboratory. The author has contributed to research in topics: Superconductivity & Vortex. The author has an hindex of 31, co-authored 95 publications receiving 2566 citations.
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Journal ArticleDOI
Two-band superconductivity in MgB2.
Maria Iavarone,Goran Karapetrov,A. E. Koshelev,W. K. Kwok,G. W. Crabtree,D. G. Hinks,Won Nam Kang,Eun-Mi Choi,Hyun-Jung Kim,Hyeong-Jin Kim,S. I. Lee +10 more
TL;DR: The study of the anisotropic superconductor MgB2 using a combination of scanning tunneling microscopy and spectroscopy reveals two distinct energy gaps with both gaps vanishing at the bulk T(c) with the data confirming the importance of Fermi-surface sheet dependent superconductivity proposed in the multigap model.
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Scanning tunneling microscopy observation of a square abrikosov lattice in LuNi2B2C
Y. De Wilde,Maria Iavarone,Ulrich Welp,V. I. Metlushko,A. E. Koshelev,Igor S. Aranson,G. W. Crabtree,P. C. Canfield +7 more
TL;DR: In this paper, the authors presented scanning tunneling microscopy measurements of the (001) surface of a LuNi{sub 2}B {sub 2]C borocarbide single crystal at 4.2K and analyzed the Ginzburg-Landau theory.
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Mixed state of a dirty two-band superconductor: application to MgB2.
TL;DR: The vortex state in a two-band superconductor with strong intraband and weak interband electronic scattering rates is investigated and the existence of two distinct length scales corresponding to different bands is demonstrated.
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Powerful terahertz emission from Bi2Sr2CaCu2O8+δ mesa arrays
Timothy Benseman,Kenneth E. Gray,A. E. Koshelev,W. K. Kwok,Ulrich Welp,Hidetoshi Minami,Kazuo Kadowaki,Takashi Yamamoto +7 more
TL;DR: In this paper, the authors demonstrate that multiple stacks patterned on the same Bi2Sr2CaCu2O8+δ crystal can be synchronized to emit high-power terahertz-radiation.
Journal ArticleDOI
Periodic alternating 0- and π-junction structures as realization of φ-Josephson junctions
TL;DR: In this article, the authors considered the properties of a periodic structure consisting of small alternating $0$- and $ensuremath{\pi}$-Josephson junctions and showed that depending on the relation between the lengths of the individual junctions, this system can be either in the homogeneous or in the phase-modulated state.