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Condensed Matter
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Superstripes Physics, 4th Edition
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Superstripes Physics, 4th Edition

A special issue of Condensed Matter (ISSN 2410-3896). This special issue belongs to the section "Quantum Materials".

Deadline for manuscript submissions: closed (30 April 2026) | Viewed by 5419

Special Issue Editors

Prof. Dr. Antonio Bianconi

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Guest Editor
Rome International Center for Materials Science Superstripes (RICMASS), Via dei Sabelli 119A, 00185 Rome, Italy
Interests: synchrotron radiation research; protein fluctuations; active sites of metalloproteins; origin of life; selected molecules in prebiotic world; quantum phenomena in complex matter; quantum confinement; superstripes in complex matter; lattice complexity in transition metal oxides; high Tc superconductors; valence fluctuation materials
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Andrea Perali

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Guest Editor
Scuola del Farmaco e Divisione di Fisica, Edificio di Fisica, Università di Camerino, Via Madonna delle Carceri 9, 62032 Camerino, Italy
Interests: high-Tc superconductivity (theory and phenomenology); multiband superconductivity; quantum size effects and shape resonances in superconductors; nanoscale superconductors; superconducting heterostructures; BCS-BEC crossover; pseudogap; superconducting fluctuations; ultracold fermions: superfluidity and BCS-BEC crossover; electron–hole superfluidity
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Yasutomo Uemura

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Guest Editor
Department of Physics, Columbia University, New York, NY 10027, USA
Interests: atomic, molecular, and optical physics; condensed matter physics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue will publish selected papers from the Superstripes 2025 meeting due to take place on October 11–17, 2025, in Erice-Sicily, Italy.

The Superstripes & Quantum Complex Matter 2025 Erice meeting focuses on advances in new quantum materials and quantum devices in complex systems. This year, the Superstripes 2025 meeting in Erice will focus on advanced experimental methods, quantum materials, and artificial quantum devices, probing and controlling quantum mechanisms driving quantum coherence at high temperatures and superconductivity at low dimensions.

The course will cover a broad range of topics on quantum phenomena in complex matter and theory developments and experimental methods which have changed our understanding of complex quantum matter.

The meeting is dedicated to the late Mikhail Eremets who presented, at the Superstripes 2015 conference, the discovery of superconductivity with Tc = 203K in pressurized hydrogen sulfide followed by other hydrides with Tc over 250K, receiving the 2015 Ugo Fano Gold Medal with Lev Gorkov, in Rome in December 2015.

You are invited to contribute an article or review paper for possible publication in our Special Issue. Submissions will be rapidly reviewed and published shortly, if accepted.

Prof. Dr. Antonio Bianconi
Dr. Andrea Perali
Prof. Dr. Yasutomo Uemura
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Condensed Matter is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • quantum complex matter
  • quantum phenomena
  • quantum coherence
  • superconductivity
  • X-Ray spectroscopy
  • X-Ray diffraction

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Related Special Issues

Published Papers (4 papers)

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Research

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15 pages, 492 KB  
Article
Two-Carrier Description of Cuprate Superconductors from NMR
by Daniel Bandur, Abigail Lee, Jakob Nachtigal, Stefan Tsankov and Jürgen Haase
Condens. Matter 2026, 11(1), 5; https://doi.org/10.3390/condmat11010005 - 5 Feb 2026
Viewed by 862
Abstract
Cuprates currently hold the record for the highest temperature superconductivity at ambient pressure, but the microscopic understanding of these materials remains elusive. Here, we utilize nuclear magnetic resonance (NMR) data of planar oxygen and copper from essentially all hole-doped cuprates to provide a [...] Read more.
Cuprates currently hold the record for the highest temperature superconductivity at ambient pressure, but the microscopic understanding of these materials remains elusive. Here, we utilize nuclear magnetic resonance (NMR) data of planar oxygen and copper from essentially all hole-doped cuprates to provide a universal phenomenology relating the NMR spin shifts, which measure the electronic spin polarization at a given nucleus, with the superconducting dome and maximum critical temperature. There appear to be two separate contributions to the spin shift in planar copper, only one of which is seen at the oxygen site, and we associate them with two different types of carriers. Upon disentangling these two components, their relative size is shown to correlate not only with the doping dependence of the superconducting dome but also with the variation in maximum superconducting critical temperature, Tc,max, between different families. One of these components is independent of family and resides in the hybridized planar orbitals of Cu and O. The second component, in contrast, is predominately isotropic and encodes the differences between the families. It is thus related to the charge transfer gap and planar hole sharing. Our findings offer universal insight which should prove useful in the continuing development of a comprehensive theory of the cuprates, as well as an indication of how it may be possible to engineer materials with higher critical temperatures. Full article
(This article belongs to the Special Issue Superstripes Physics, 4th Edition)
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12 pages, 2292 KB  
Article
Electron Correlation and High-Temperature Superconductivity
by Takeshi Egami
Condens. Matter 2026, 11(1), 4; https://doi.org/10.3390/condmat11010004 - 30 Jan 2026
Viewed by 978
Abstract
Strong electron correlation plays a central role in the high-temperature superconductivity (HTSC) of cuprates. However, to date, research has focused only on its role in spin dynamics and related effects, even though it is becoming increasingly clear that spin alone may not be [...] Read more.
Strong electron correlation plays a central role in the high-temperature superconductivity (HTSC) of cuprates. However, to date, research has focused only on its role in spin dynamics and related effects, even though it is becoming increasingly clear that spin alone may not be sufficient to create HTSC. Here, we discuss a possible role of electron correlation in the Bose–Einstein condensation (BEC) of Cooper pairs. Recently, we succeeded in observing dynamic electron correlation via inelastic X-ray scattering through results presented in real space. We discovered that electron correlations are strongly modified in the plasmon, proving that electron dynamics significantly affect electron correlation. Earlier, we found that in 4He, the atom–atom distance in the BE condensate is 10% longer than that in the non-condensate. These results suggest the possibility that the reduction in electron-repulsion energy upon BEC is driving Tc to high values. Thus, electron correlation itself could be the origin of the HTSC phenomenon. Full article
(This article belongs to the Special Issue Superstripes Physics, 4th Edition)
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Other

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12 pages, 1008 KB  
Opinion
Lasting Aftermaths of the First Incitement for High-Temperature Superconductivity
by Serguei Brazovskii and Natasha Kirova
Condens. Matter 2026, 11(2), 15; https://doi.org/10.3390/condmat11020015 - 27 Apr 2026
Viewed by 106
Abstract
Six decades ago, the scientist from Stanford University, W.P. Little, announced a crusade to search for superconductivity, assumed to be heat-resistant in organic materials. Although such an ambitious goal was never realized in practice, this proposal gave rise to the entire ecosystem of [...] Read more.
Six decades ago, the scientist from Stanford University, W.P. Little, announced a crusade to search for superconductivity, assumed to be heat-resistant in organic materials. Although such an ambitious goal was never realized in practice, this proposal gave rise to the entire ecosystem of studies on “synthetic metals,” creating a diverse community of material, experimental, and theoretical activities in low-dimensional electronic systems. We shall briefly review some key steps in this history, examine its main branches, and recall the consequences that remain on the agenda today. Particularly, we shall focus on a phenomenon of electronic ferroelectricity, whose roots can be found in the suggestion of a would-be superconducting polymer. Full article
(This article belongs to the Special Issue Superstripes Physics, 4th Edition)
17 pages, 1277 KB  
Perspective
Nanoscale Lattice Heterostructure in High-Tc Superconductors
by Annette Bussmann-Holder, Jürgen Haase, Hugo Keller, Reinhard K. Kremer, Sergei I. Mukhin, Alexey P. Menushenkov, Andrei Ivanov, Alexey Kuznetsov, Victor Velasco, Steven D. Conradson, Gaetano Campi and Antonio Bianconi
Condens. Matter 2025, 10(4), 56; https://doi.org/10.3390/condmat10040056 - 30 Oct 2025
Cited by 1 | Viewed by 2647
Abstract
Low-temperature superconductivity has been known since 1957 to be described by BCS theory for effective single-band metals controlled by the density of states at the Fermi level, very far from band edges, the electron–phonon coupling constant l, and the energy of the boson [...] Read more.
Low-temperature superconductivity has been known since 1957 to be described by BCS theory for effective single-band metals controlled by the density of states at the Fermi level, very far from band edges, the electron–phonon coupling constant l, and the energy of the boson in the pairing interaction w0, but BCS has failed to predict high-temperature superconductivity in different materials above about 23 K. High-temperature superconductivity above 35 K, since 1986, has been a matter of materials science, where manipulating the lattice complexity of high-temperature superconducting ceramic oxides (HTSCs) has driven materials scientists to grow new HTSC quantum materials up to 138 K in HgBa2Ca2Cu3O8 (Hg1223) at ambient pressure and near room temperature in pressurized hydrides. This perspective covers the major results of materials scientists over the last 39 years in terms of investigating the role of lattice inhomogeneity detected in these new quantum complex materials. We highlight the nanoscale heterogeneity in these complex materials and elucidate their special role played in the physics of HTSCs. Especially, it is highlighted that the geometry of lattice and charge complex heterogeneity at the nanoscale is essential and intrinsic in the mechanism of rising quantum coherence at high temperatures. Full article
(This article belongs to the Special Issue Superstripes Physics, 4th Edition)
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