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Condensed Matter, Volume 5, Issue 2

June 2020 - 20 articles

Cover Story: As is often the case, disorder can make things more complicated, yet more intriguing, paving the way for new phenomena. This is observed for two-dimensional superconductors, where nanoscale inhomogeneity can fragment the system into superconducting puddles embedded in a metallic background. When a thin percolating path is formed, a fragile superconducting state emerges, with peculiar transport properties. The proliferation of new superconducting puddles induced by the proximity effect can substantially reduce the fragility of the superconducting state, producing a sizable increase in the superfluid stiffness well below the critical temperature for onset of the percolative zero-resistance state. In this work, we use a mean-field-like approach to investigate this process by modeling the finite-frequency response of the system. View this paper
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Articles (20)

  • Review
  • Open Access
6 Citations
5,318 Views
15 Pages

In this contribution to the MDPI Condensed Matter issue in Honor of Nobel Laureate Professor K.A. Müller I review recent experimental progress on magnetism of semiconducting transition metal dichalcogenides (TMDs) from the local-magnetic probe p...

  • Review
  • Open Access
7 Citations
4,546 Views
10 Pages

A Versatile THz Source from High-Brightness Electron Beams: Generation and Characterization

  • Enrica Chiadroni,
  • Alessandro Cianchi,
  • Massimo Ferrario,
  • Andrea Mostacci,
  • Riccardo Pompili and
  • Vladimir Shpakov

Ultra-short electron bunches, such as those delivered by a high-brightness photo-injector, are suitable to produce high peak power THz radiation, both broad and narrow band, with sub-picosecond down to femtosecond pulse shaping. The features of this...

  • Article
  • Open Access
6 Citations
6,401 Views
9 Pages

Topological Dirac Semimetal Phase in Bismuth Based Anode Materials for Sodium-Ion Batteries

  • Wei-Chi Chiu,
  • Bahadur Singh,
  • Sougata Mardanya,
  • Johannes Nokelainen,
  • Amit Agarwal,
  • Hsin Lin,
  • Christopher Lane,
  • Katariina Pussi,
  • Bernardo Barbiellini and
  • Arun Bansil

Bismuth has recently attracted interest in connection with Na-ion battery anodes due to its high volumetric capacity. It reacts with Na to form Na 3 Bi which is a prototypical Dirac semimetal with a nontrivial electronic structure. Density-fun...

  • Article
  • Open Access
8 Citations
4,315 Views
14 Pages

Spatially Resolved Spectral Imaging by A THz-FEL

  • Akinori Irizawa,
  • Masaki Fujimoto,
  • Keigo Kawase,
  • Ryukou Kato,
  • Hidenori Fujiwara,
  • Atsushi Higashiya,
  • Salvatore Macis,
  • Luca Tomarchio,
  • Stefano Lupi and
  • Augusto Marcelli
  • + 1 author

Using the unique characteristics of the free-electron-laser (FEL), we successfully performed high-sensitivity spectral imaging of different materials in the terahertz (THz) and far-infrared (FIR) domain. THz imaging at various wavelengths was achieve...

  • Article
  • Open Access
2 Citations
3,617 Views
12 Pages

Some two-dimensional superconductors like, e.g., LaAlO 3 /SrTiO 3 heterostructures or thin films of transition metal dichalcogenides, display peculiar properties that can be understood in terms of electron inhomogeneity at the nanoscal...

  • Article
  • Open Access
7 Citations
3,483 Views
13 Pages

Static Kinks in Chains of Interacting Atoms

  • Haggai Landa,
  • Cecilia Cormick and
  • Giovanna Morigi

We theoretically analyse the equation of topological solitons in a chain of particles interacting via a repulsive power-law potential and confined by a periodic lattice. Starting from the discrete model, we perform a gradient expansion and obtain the...

  • Article
  • Open Access
5 Citations
3,654 Views
10 Pages

Evaluation of Bunch Length by Measuring Coherent Synchrotron Radiation with a Narrow-Band Detector at LEBRA

  • Takeshi Sakai,
  • Ken Hayakawa,
  • Toshinari Tanaka,
  • Yasushi Hayakawa,
  • Kyoko Nogami and
  • Norihiro Sei

This study presents a novel technology to measure electron bunch length with a high time resolution by measuring coherent synchrotron radiation using a narrow-band detector at Laboratory for Electron Beam Research and Application (LEBRA)—an S-b...

  • Feature Paper
  • Communication
  • Open Access
15 Citations
4,506 Views
7 Pages

Superconducting domain boundaries were found in WO3-x and doped WO3. The charge carriers in WO3-type materials were identified by Schirmer and Salje as bipolarons. Several previous attempts to determine the electronic properties of polarons in WO3 fa...

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Condens. Matter - ISSN 2410-3896