Sharpness of the Berezinskii-Kosterlitz-Thouless transition in ultrathin NbN films

We present a comprehensive investigation of the Berezinskii-Kosterlitz-Thouless (BKT) transition in ultrathin strongly disordered NbN films. Measurements of resistance, current-voltage characteristics and kinetic inductance on the very same device reveal a consistent picture of a sharp unbinding transition of vortex-antivortex pairs that fit standard renormalization group theory without extra assumptions in terms of inhomogeneity. Our experiments demonstrate that the previously observed broadening of the transition is not an intrinsic feature of strongly disordered superconductors and provide a clean starting point for the study of dynamical effects at the BKT transition.Comment: Main: 6 pages, 4 figures; Supplement: 6 pages, 10 figures, author adde

The Lantern Vol. 73, No. 1, Fall 2005

• Newspaper Clippings Found on the Wall of Giuseppe Luchenzo\u27s Home When it was Raided by Police • All the Time in the World • The Man Who Would Win • Souffle Suit • A Day in the Mind • Context • Felicity / Awareness • Frivolous • Thank You Note to J.S.B. • September 17, 2005 • Eight Ways of Looking at a Highway • Dusty Glass Spreads Air Like Light • Clockwork • Rubber Band • Outside Eye or I Am? • A Mundane Mysticism • Half Carat • Things I Learned on My Trip to the Mutter Museum of Medical Oddities • Peer Editing • The Attic Bones • Yeshttps://digitalcommons.ursinus.edu/lantern/1167/thumbnail.jp

The Lantern Vol. 71, No. 1, Fall 2003

• Lights of Venice • Portrait • Switzerland • Drunken • Revel Writing • Nectarines • Shifting Gears • Stogie • Reflect • In the Key of Fuchsia Minor • Jarring • Sissy • Mongols vs. Amish: X-Treme Culture Clash • Holding On • The Bethany • Creekside • The Real Thing • On Being Alone and Other Pleasures • Forced Entry • The Case of Beauty: Aesthetics of Distancehttps://digitalcommons.ursinus.edu/lantern/1163/thumbnail.jp

The Lantern Vol. 71, No. 2, Spring 2004

• Football Captain • Grass Blades • Identity Theft • Her Shoulders • Doing 100 • Watching the • Fifteen Lines for Five • Plague • On the Occasion of Kissing You Less Than I Used To • Decomposey • Broomhandles • Just a Minute • War of the Words • Seguidille • At the End of One\u27s Rope • The Ride and Joe • I Want Soft Curls • Broken • Stories of a Hypochondriac • The TV is in Jail & My Mom is the Wardenhttps://digitalcommons.ursinus.edu/lantern/1164/thumbnail.jp

The Lantern Vol. 72, No. 1, Fall 2004

• Jazz • Bifocal Brainfreeze • A Mug of Tea • Autumn Blend • Montana Skies • Madeleine Parenthesis • Ghosts Come Out at Night • Time • 144 Cromwell Road • Market East • Secret • Stream • What Might Have Been or What Never Was • Buried Mirth • Conversations With a Writer • Churning Through • Chum-Salmon Intentions • Cages • Lola Sang of Green Glass Landscapes • Peg\u27s Antiques • Life at 120 Decibelshttps://digitalcommons.ursinus.edu/lantern/1165/thumbnail.jp

The Lantern Vol. 72, No. 2, Spring 2005

• Transmigration • Faces of the Moon • Euphony of the Euphonium • He Met Me in the Arcs & Ebbs of Frailty • An Adoration of Ordination • Ebony: The Essence Thereof • Curbside Statue Has No Legs Left • Triggerfinger Romance • Lost • Running Through Connecticut • Eve • The Day Lates and the Dollar Shorts • Somnambulist • That\u27s That • The Glenn Machine • Evenfall in Bad Homburg • Absence of Field • Dating Myself • Traveling Without a Map • The Non-Euclidean Way to Get Some Bagels • La Belle Epoque • Satin Boxeshttps://digitalcommons.ursinus.edu/lantern/1166/thumbnail.jp

Supercurrent interference in HgTe Josephson junctions

Wires made of topological insulators (TI) are a promising platform for searching for Majorana bound states. These states can be probed by analyzing the fractional ac Josephson effect in Josephson junctions with the TI wire as a weak link. An axial magnetic field can be used to tune the system from trivial to topologically nontrivial. Here we investigate the oscillations of the supercurrent in such wire Josephson junctions as a function of the axial magnetic field strength and different contact transparencies. Although the current flows on average parallel to the magnetic field we observe h/2e, h/4e- and even h/8e-periodic oscillations of the supercurrent in samples with lower contact transparencies. Corresponding tight-binding transport simulations using a Bogoliubov-de Gennes model Hamiltonian yield the supercurrent through the Josephson junctions, showing in particular the peculiar h/4e-periodic oscillations observed in experiments. A further semiclassical analysis based on Andreev-reflected trajectories connecting the two superconductors allows us to identify the physical origin of these oscillations. They can be related to flux-enclosing paths winding around the TI-nanowire, thereby highlighting the three-dimensional character of the junction geometry compared to common planar junctions

The Lantern Vol. 73, No. 2, Spring 2006

• Of the Man • Beauty in America • Kindling • Genevieve • Bits of Copper • A Love Song to Hip Hop • From James\u27 Journal • I Want a Woman • Peregrine Rain • Resurge • Frustrations • (At Least) You Gave Me Something to Write About • The Fun of Giving Interactive History Lectures as a Summer Job • Exigence • White Water • My Summer, with Salt • The City With Two Faces • I Dig Your Cello • Life-Filled Ghost Town • Laura, On Happiness • Integration/Assimilation • Sunny Side Estates • Every Night I Shut My Eyes • New England State of Mind • Your Body\u27s Weight in Water for Your Soul, Thank You Very Much • A Story That\u27s 10 Percent Truehttps://digitalcommons.ursinus.edu/lantern/1168/thumbnail.jp

Klaus Strunk - Kleine Schriften , 2 vll., 1318 pgg.

Raccolta in due volumi degli articoli di Klaus Strunk, Universit\ue0 di Monaco di Baviera, emerito, contenente l\ub4elenco cronologico di tutte le sue pubblicazioni, con indici delle cose e delle parole. Opera di grande valore per l\ub4indoeuropeistica odierna