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Condensed Matter
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New Advances in Condensed Matter Physics, 2nd Edition
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New Advances in Condensed Matter Physics, 2nd Edition

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

Deadline for manuscript submissions: 31 October 2025 | Viewed by 926

Special Issue Editor

Prof. Dr. Mukunda Das

E-Mail Website
Guest Editor
Department of Theoretical Physics, Research School of Physics and Engineering, The Australian National University Canberra, Canberra, ACT 6201, Australia
Interests: superconductivity; bose einstein condensation; density functional theory
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Condensed matter physics is a discipline in physics that has a specific goal of understanding the structure and properties of all kinds of solids and liquids. It is a very broad and active area of research in physical sciences, and new ideas and novel materials are frequently being created. This Special Issue aims to provide an exchange platform for the latest achievements in the rapidly developing field of condensed matter physics.

Prof. Dr. Mukunda Das
Guest Editor

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 100 words) can be sent to the Editorial Office for announcement on this website.

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

  • condensed matter physics
  • solids and liquids
  • novel materials
  • quantum materials

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Published Papers (1 paper)

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Research

12 pages, 674 KB  
Article
Role of the Electron–Phonon Interaction in the Superconductivity of the 2-Dimensional Sn/Si(111) Interface
by Fernando Flores, Daniel G. Trabada, Álvaro Martín-Rodero and José Ortega
Condens. Matter 2025, 10(3), 51; https://doi.org/10.3390/condmat10030051 - 15 Sep 2025
Viewed by 425
Abstract
In order to elucidate the mechanism creating superconductivity in the 2-dimensional layer of a p-doped Sn/Si(111) surface, we have analyzed the many-body effects associated with the electron-phonon (e-ph) coupling and the electron–electron interaction. First, we have calculated the DFT surface band of the [...] Read more.
In order to elucidate the mechanism creating superconductivity in the 2-dimensional layer of a p-doped Sn/Si(111) surface, we have analyzed the many-body effects associated with the electron-phonon (e-ph) coupling and the electron–electron interaction. First, we have calculated the DFT surface band of the system and the coupling associated with the different interactions. In our calculations we find a mean field (DFT) electron bandwidth of 0.54 eV, an attractive coupling Uneg=0.32 eV associated with the e-ph coupling and an effective electron–electron Hubbard repulsion of U=0.83 eV. Then, we analyze the Hubbard Hamiltonian, neglecting in this step the e-ph coupling that is much smaller than the Hubbard coupling, by considering a p-doping in this Hamiltonian of 10%; by means of a Dynamical Mean Field (DMF) approach combined with an interpolative calculation for the self-energy, we deduce the local density of states (DOS) and show that the quasi-particle DOS induced by the doping is not large enough to induce magnetism in the Sn-monolayer. This leads us to analyze the possibility of having superconductivity by considering the attractive interaction induced by the e-ph coupling within an appropriate BCS-Hamiltonian. Our calculations show that the quasiparticle metallic system has a superconductivity critical temperature of ≈7–9 K, in good agreement with experiments. Full article
(This article belongs to the Special Issue New Advances in Condensed Matter Physics, 2nd Edition)
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