Special Issue "New Trends in Quantum Complex Matter"

A special issue of Condensed Matter (ISSN 2410-3896).

Deadline for manuscript submissions: closed (15 August 2018)

Special Issue Editors

Guest Editor
Prof. Antonio Bianconi

Rome International Center for Materials Science Superstripes (RICMASS), Via dei Sabelli 119A, 00185 Roma, Italy
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Fax: +39 06 4957697
Interests: Experimental methods: synchrotron radiation research, XANES spectroscopy, many body effects in XANES, and scanning micro x-ray diffraction; Materials: transition metal oxides, high Tc superconductors, metallo-proteins, and biological systems; Quantum phenomena in complex matter: lattice and electronic complexity, polymorphism, valence fluctuation, multi-band Hubbard models, superstripes, nanoscale electronic phase separation, protein fluctuations, effective charge and coordination in active sites of metalloproteins, and origin of life
Guest Editor
Prof. Dr. Augusto Marcelli

Laboratori Nazionali di Frascati Istituto Nazionale di Fisica Nucleare, Via E. Fermi 40, I-00044 Frascati (Rome) Italy
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Interests: synchrotron radiation research; synchrotron radiation instrumentation: IR and x-ray optics; x-ray absorption spectroscopy; circular magnetic x-ray dichroism; time resolved concurrent experiments; high Tc superconductors and quantum materials; multiple scattering theory applied to core level x-ray absorption spectra; dust and aerosol characterization and ultra-trace detection; FTIR spectromicroscopy and imaging applied to protein, cells and tissues
Guest Editor
Prof. Dr. Yasutomo Uemura

Department of Physics, Columbia University, 538 West 120th Street, 704 Pupin Hall MC 5255, New York, NY 10027, USA
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Interests: muon spin relaxation spectroscopy MuSR; neutron scattering; strongly correlated systems; unconventional superconductivity; novel magnetism; spin fluctuations and excitations in random magnetic systems, such as spin glasses and fractal spin networks

Special Issue Information

Dear Colleagues,

On behalf of the Organizing Committee, we are pleased to announce the international QCM2018 conference which will be held in Rome, Italy, 11–15 June, 2018. We cordially invite you to participate in this conference, and all presented papers will be invited to be published in a joint Special Issue (https://www.mdpi.com/journal/condensedmatter/special_issues/QCM_2018). However, we also encourage other contributions from the broader community, and this sister Special Issue is reserved for contributions which cannot be presented at the conference, on the following topics. Note that the Editorial Office will merge the publications of these two Special Issues into one printed book after completion.

Correlated Electronic Systems:

  • unconventional superconductivity
  • novel magnetism
  • Mott transition
  • quantum criticality
  • multi-band Hubbard model
  • Lifshitz transitions

Nano Science:

  • graphene
  • TMDC
  • QHE
  • Topological
  • 2-D materials
  • Fano resonances

Spintronics:

  • Skyrmions
  • Itinerant electron
  • Magnetism
  • Spin current
  • Magnetic memory

Cold Atoms:

  • Feshbach Resonance
  • Hubbard Model
  • BEC-BCS crossover

More detailed information about the conference could be found at: https://www.mdpi.com/journal/condensedmatter/events/7005

Register for the conference, please click: http://www.superstripes.net/quantum-complex-matter-2018

Prof. Antonio Bianconi
Prof. Dr. Augusto Marcelli
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 papers will be 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) is waived for well-prepared manuscripts submitted to this issue. 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.

Published Papers (3 papers)

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Research

Open AccessArticle A Monte-Carlo Study on the Coupling of Magnetism and Ferroelectricity in the Hexagonal Multiferroic RMnO3
Condens. Matter 2018, 3(4), 28; https://doi.org/10.3390/condmat3040028
Received: 15 August 2018 / Revised: 16 September 2018 / Accepted: 18 September 2018 / Published: 20 September 2018
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Abstract
The ferroelectric phase transition in RMnO3 breaks both Z3 and Z2 symmetries, giving rise to 6 structural domains. Topological protected vortices are formed at the junctions of all 6 domains, and the ferroelectric phase transition is closely related to these
[...] Read more.
The ferroelectric phase transition in RMnO3 breaks both Z3 and Z2 symmetries, giving rise to 6 structural domains. Topological protected vortices are formed at the junctions of all 6 domains, and the ferroelectric phase transition is closely related to these Z6 vortices. In this work, Monte-Carlo studies on both the ferroelectric and magnetic transition have been performed on RMnO3 system. The magnetic simulation results on lattices with different structural domain distributions induced by external electric field and simulated quenching show different magnetic transition temperature T s , indicating that the coupling of magnetism and ferroelectricity is through the Z6 structural domain. At extreme case, lattice quenched from above the ferroelectric transition results in high vortex density, which can drive the system into spin glass. Full article
(This article belongs to the Special Issue New Trends in Quantum Complex Matter)
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Open AccessArticle Ground-State Magnetization in Mixtures of a Few Ultra-Cold Fermions in One-Dimensional Traps
Condens. Matter 2018, 3(1), 7; https://doi.org/10.3390/condmat3010007
Received: 31 January 2018 / Revised: 28 February 2018 / Accepted: 5 March 2018 / Published: 6 March 2018
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Abstract
Ground-state properties of a few spin-1/2 ultra-cold fermions confined in a one-dimensional trap are studied by the exact diagonalization method. In contrast to previous studies, it is not assumed that the projection of a spin of individual particles is fixed.
[...] Read more.
Ground-state properties of a few spin- 1 / 2 ultra-cold fermions confined in a one-dimensional trap are studied by the exact diagonalization method. In contrast to previous studies, it is not assumed that the projection of a spin of individual particles is fixed. Therefore, the spin is treated as an additional degree of freedom and the global magnetization of the system is established spontaneously. Depending on the shape of the trap, inter-particle interactions, and an external magnetic field, the phase diagram of the system is determined. It is shown that, for particular confinements, some values of the magnetization cannot be reached by the ground-state of the system. Full article
(This article belongs to the Special Issue New Trends in Quantum Complex Matter)
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Figure 1

Open AccessArticle VUV Pump and Probe of Phase Separation and Oxygen Interstitials in La2NiO4+y Using Spectromicroscopy
Condens. Matter 2018, 3(1), 6; https://doi.org/10.3390/condmat3010006
Received: 17 January 2018 / Revised: 8 February 2018 / Accepted: 9 February 2018 / Published: 11 February 2018
Cited by 1 | PDF Full-text (1521 KB) | HTML Full-text | XML Full-text
Abstract
While it is known that strongly correlated transition metal oxides described by a multi-band Hubbard model show microscopic multiscale phase separation, little is known about the possibility to manipulate them with vacuum ultraviolet (VUV), 27 eV lighting. We have investigated the photo-induced effects
[...] Read more.
While it is known that strongly correlated transition metal oxides described by a multi-band Hubbard model show microscopic multiscale phase separation, little is known about the possibility to manipulate them with vacuum ultraviolet (VUV), 27 eV lighting. We have investigated the photo-induced effects of VUV light illumination of a super-oxygenated La2NiO4+y single crystal by means of scanning photoelectron microscopy. VUV light exposure induces the increase of the density of states (DOS) in the binding energy range around Eb = 1.4 eV below EF. The photo-induced states in this energy region have been predicted due to clustering of oxygen interstitials by band structure calculations for large supercell of La2CuO4.125. We finally show that it is possible to generate and manipulate oxygen rich domains by VUV illumination as it was reported for X-ray illumination of La2CuO4+y. This phenomenology is assigned to oxygen-interstitials ordering and clustering by photo-illumination forming segregated domains in the La2NiO4+y surface. Full article
(This article belongs to the Special Issue New Trends in Quantum Complex Matter)
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