title: Experimental Realization of a Topological p-n Junction by Intrinsic Defect Grading.
abstract: A Bi2Te3 single crystal is grown with the modified Bridgman technique. The crystal has a nominal composition with a Te content of 61 mol% resulting in the existence of two distinct regions, p- and n-doped, respectively; color-coded tunneling spectra are taken over 60 nm at the transition region.
authors.affiliation: Physikalisches Institut, Experimentelle Physik II, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Bathon
authors.affiliation: Fisica, Universià Cattolica di Brescia, via dei Musei 41, 25121, Brescia, Italy.
authors.forename: Simona
authors.initials: S
authors.lastname: Achilli
authors.affiliation: Physikalisches Institut, Experimentelle Physik II, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
authors.forename: Paolo
authors.initials: P
authors.lastname: Sessi
authors.affiliation: A.V. Rzanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia.
authors.forename: Vladimir Andreevich
authors.initials: VA
authors.lastname: Golyashov
authors.affiliation: V. S. Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia.|Novosibirsk State University, 630090, Novosibirsk, Russia.|Saint-Petersburg State University, 198504, Saint-Petersburg, Russia.
authors.forename: Konstantin Aleksandrovich
authors.initials: KA
authors.lastname: Kokh
authors.affiliation: A.V. Rzanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia.|Novosibirsk State University, 630090, Novosibirsk, Russia.|Saint-Petersburg State University, 198504, Saint-Petersburg, Russia.
authors.forename: Oleg Evgenievich
authors.initials: OE
authors.lastname: Tereshchenko
authors.affiliation: Physikalisches Institut, Experimentelle Physik II, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.|Wilhelm Conrad Röntgen-Center for Complex Material Systems (RCCM), Am Hubland, 97074, Würzburg, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Bode
keywords: density functional theory; p-n junctions; scanning tunneling microscopy; topological insulators; transport