Article
Materials Science, Multidisciplinary
Tilen Cadez, Yeongjun Kim, Alexei Andreanov, Sergej Flach
Summary: We study the effect of infinitesimal onsite disorder on d-dimensional all bands flat lattices, finding that localization persists for any choice of local unitaries in d = 1 and d = 2, and the localization length can be maximized for specific values of theta i. However, in d = 3, we identify a nonperturbative metal-insulator transition upon varying all bands' flat manifold angles.
Article
Materials Science, Multidisciplinary
M. S. Tacca, T. Jacob, E. C. Goldberg
Summary: The study calculates the conductance spectra of a Co atom adsorbed on Cu(111) and finds that the interaction between atoms introduces a zero-bias anomaly, with the coupling with localized surface states playing a crucial role in shaping interference line profiles.
Article
Materials Science, Multidisciplinary
Sayandip Ghosh, Guido Menichetti, Mikhail I. Katsnelson, Marco Polini
Summary: Two-dimensional honeycomb ferromagnets provide opportunities to study interactions that are not observed in standard bulk ferromagnets. They have an optical spin-wave branch and a plasmonic mode, and when these two branches meet, interactions between charge and spin sectors can occur.
Article
Physics, Fluids & Plasmas
M. Ostilli, Claudionor G. Bezerra, G. M. Viswanathan
Summary: In this paper, we address the problem of finding the spectrum of the tight-binding model on Cayley trees. We propose a recursive procedure and the use of canonical basis to derive the complete spectrum efficiently. Our results show fundamental differences between Cayley trees and Bethe lattice, even in the thermodynamic limit, including the density of states.
Article
Mathematics
W-M Wang
Summary: This paper presents a set of smooth infinite energy global solutions to the non-integrable, nonlinear Schrodinger equations on R. These solutions are space-time quasi-periodic with two frequencies each.
INTERNATIONAL MATHEMATICS RESEARCH NOTICES
(2023)
Article
Physics, Multidisciplinary
Tadahiro Miyao, Hayato Tominaga
Summary: In this paper, the authors investigate the periodic Anderson model (PAM) with electron-phonon interactions. By using a novel analytical approach based on operator inequalities, they demonstrate that the ground state at half-filling is a unique spin-singlet state with short-range antiferromagnetism.
Article
Materials Science, Multidisciplinary
Luca Magazzu, Milena Grifoni
Summary: We present a nonperturbative and formally exact approach for studying charge transport in interacting nanostructures. By introducing the Feynman-Vernon influence functional, the path integral representation of the nanostructure is expressed as a combination of Coulomb sampling and hopping. By expanding the influence functional and integrating the Grassmann variables, a generalized master equation for the density matrix and an exact expression for the current are obtained.
Article
Physics, Mathematical
Hongyi Cao, Yunfeng Shi, Zhifei Zhang
Summary: In this paper, the authors study the multidimensional lattice Schrodinger operators with C2-cosine like quasi-periodic potential. They establish quantitative Green's function estimates, the arithmetic version of Anderson (and dynamical) localization, and the finite volume version of (1 2 -)-Holder continuity of the integrated density of states for such operators. The proof is based on an extension of the multi-scale analysis method to higher lattice dimensions. The authors also resolve the level crossing issue on eigenvalues parameterizations in the case of both higher lattice dimensions and C2 regular potential.
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Salma Waseem, Talat Zeeshan, Hafsa Tariq, Farzana Majid, Muhammad Danish Ali, Zohra Nazir Kayani, Mongi Amami
Summary: This study focused on doped TiO2-based diluted magnetic semiconductors with Co and Fe, utilizing various analysis techniques to confirm the room temperature ferromagnetism and reduction in optical band gap by the addition of transition metal ions.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Physics, Multidisciplinary
E. Jurcisinova, M. Jurcisin
Summary: In this study, the phase diagram of the antiferromagnetic spin-1/2 Ising-like model on the octahedral lattice, with varying strengths of nearest-neighbor interactions in all horizontal planes compared to the interactions between them, was investigated using the recursive lattice approximation. The existence of an intermediate phase separating two dominant antiferromagnetic phases was discovered, and the nature of phase transitions between different phases was determined. The sublattice and total magnetization properties of the model's phases were also studied, revealing that the introduced interaction-generated anisotropy has a strong impact on the existence and magnetization properties of weak ferromagnetism in pure antiferromagnetic spin systems.
Article
Physics, Mathematical
Joris De Moor, Florian Dorsch, Hermann Schulz-Baldes
Summary: A sequence of invertible matrices obtained by small random perturbation around a fixed diagonal partially hyperbolic matrix induces random dynamics on the Grassmann manifolds. Under suitable weak conditions, it is known to have a unique invariant (Furstenberg) measure. The main result provides concentration bounds on this measure, indicating that the random dynamics mostly stays near stable fixed points of the unperturbed matrix, where the strength of random perturbation dominates the local hyperbolicity of the diagonal matrix. As an application, bounds on sums of Lyapunov exponents are obtained.
JOURNAL OF MATHEMATICAL PHYSICS
(2023)
Article
Chemistry, Physical
Khushboo Punia, Ganesh Lal, Saurabh Dalela, Satya Narain Dolia, Parvez Ahmad Alvi, Shiv K. Barbar, Kunal B. Modi, Sudhish Kumar
Summary: The study reveals the impact of Gd substitution on the structural, optical, photoluminescence, and magnetic properties of Zn1-xGdxO nanocrystals, including crystallinity, band gap energy, emission characteristics, and magnetization behavior. Gd substitution results in a reduction in the average crystallite size of Zn1-xGdxO nanocrystals and confirms the coexistence of paramagnetic and weak ferromagnetic ordering in the presence of Gd.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Youjiang Xu, Irakli Titvinidze, Walter Hofstetter
Summary: We have demonstrated the ubiquity of invisible bands associated with zeros of the single-particle Green's function at topological interfaces of two-dimensional Chern insulators, which are dual to the chiral edge/domain-wall modes. This was achieved by studying the domain walls of a repulsive Hubbard model with a topological flat band using real-space dynamical mean-field theory. Our numerical results further revealed that the chiral modes are split into branches due to interaction, with these branches connected by invisible flat bands. This work provides valuable insights into interacting topological systems.
Article
Multidisciplinary Sciences
Manasa Kalla, Narasimha Raju Chebrolu, Ashok Chatterjee
Summary: This study investigates a single molecular transistor with local electron-electron and electron-phonon interactions in a quantum dot. By modeling and calculating, we analyze the dynamic behavior of the system and the time-dependent current, and explore regions suitable for fast switching in devices like nanomolecular switches.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Qingxin Liu, Peihan Sun, Fanyu Meng, Yanyan Geng, Zhonghao Liu, Jianfeng Zhang, Jingjing Gao, Zhicheng Jiang, Shangjie Tian, Xuan Luo, Yuping Sun, Zhihai Cheng, Kai Liu, Hechang Lei, Shancai Wang
Summary: By using a certain experimental method, researchers observed the flat band and splitting phenomenon in 4Hb-TaS1.3Se0.7, providing a platform for manipulating electron-correlation-related quantum phenomena at a low energy scale.
Article
Materials Science, Multidisciplinary
Jaromir Panas, Anna Kauch, Jan Kunes, Dieter Vollhardt, Krzysztof Byczuk
Article
Materials Science, Multidisciplinary
Damian Zdulski, Krzysztof Byczuk
Article
Materials Science, Multidisciplinary
J. Skolimowski, D. Vollhardt, K. Byczuk
Article
Physics, Multidisciplinary
K. Makuch, J. Skolimowski, P. B. Chakraborty, K. Byczuk, D. Vollhardt
NEW JOURNAL OF PHYSICS
(2013)
Article
Physics, Condensed Matter
Anna Kauch, Krzysztof Byczuk
PHYSICA B-CONDENSED MATTER
(2012)
Article
Optics
G. Pelka, K. Byczuk, J. Tworzydlo
Article
Materials Science, Multidisciplinary
Prabuddha B. Chakraborty, Krzysztof Byczuk, Dieter Vollhardt
Article
Materials Science, Multidisciplinary
Anna Kauch, Krzysztof Byczuk, Dieter Vollhardt
Article
Physics, Multidisciplinary
Krzysztof Byczuk, Jan Kunes, Walter Hofstetter, Dieter Vollhardt
PHYSICAL REVIEW LETTERS
(2012)
Article
Physics, Condensed Matter
Krzysztof Byczuk, Banhi Chatterjee, Dieter Vollhardt
EUROPEAN PHYSICAL JOURNAL B
(2019)
Article
Materials Science, Multidisciplinary
A. Oestlin, Y. Zhang, H. Terletska, F. Beiuseanu, V Popescu, K. Byczuk, L. Vitos, M. Jarrell, D. Vollhardt, L. Chioncel
Article
Materials Science, Multidisciplinary
B. Chatterjee, J. Skolimowski, K. Makuch, K. Byczuk
Article
Physics, Multidisciplinary
J. Skolimowski, D. Vollhardt, K. Byczuk
JOURNAL OF PHYSICS COMMUNICATIONS
(2018)
Article
Materials Science, Multidisciplinary
Jaromir Panas, Anna Kauch, Krzysztof Byczuk
Proceedings Paper
Physics, Atomic, Molecular & Chemical
Banhi Chatterjee, Krzysztof Byczuk
INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS 2014 (SCES2014)
(2015)