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Exploring two-dimensional (2D) materials with magnetic ordering is a focus of current research. It remains a challenge to achieve tunable magnetism in a material of one-atom-thickness without introducing extrinsic magnetic atoms or defects.…

材料科学 · 物理学 2017-08-29 Sai Gong , Wenhui Wan , Shan Guan , Bo Tai , Chang Liu , Botao Fu , Shengyuan A. Yang , Yugui Yao

We compare the results of the transport and time-resolved magneto-luminescence measurements in disordered 2D electron systems in GaAs-AlGaAs heterostructures in the extreme quantum limit, in particular, in the vicinity of the…

凝聚态物理 · 物理学 2009-10-28 I. V. Kukushkin , Vladimir I. Fal'ko , R. J. Haug , K. v. Klitzing , K. Eberl

Using the extensively studied V2O3 as a prototype system, we investigate the role of percolation in metal-insulator transition (MIT). We apply scanning microwave impedance microscopy to directly determine the metallic phase fraction p and…

Either in bulk form, or when exfoliated into atomically thin crystals, layered transition metal dichalcogenides are continuously leading to the discovery of new phenomena. The latest example is provided by 1T'-WTe$_2$, a semimetal recently…

介观与纳米尺度物理 · 物理学 2017-08-23 Lin Wang , Ignacio Gutiérrez-Lezama , Céline Barreteau , Nicolas Ubrig , Enrico Giannini , A. F. Morpurgo

We propose a statistical model defined on the three-dimensional diamond network where the splitting of randomly selected nodes leads to a spatially disordered network, with decreasing degree of connectivity. The terminal state, that is…

无序系统与神经网络 · 物理学 2013-10-16 Susan Nachtrab , Matthias J. F. Hoffmann , Sebastian C. Kapfer , Gerd E. Schroeder-Turk , Klaus Mecke

Recently, two-dimensional materials and nanoparticles with robust ferromagnetism are even of great interest to explore basic physics in nanoscale spintronics. More importantly, room-temperature magnetic semiconducting materials with high…

材料科学 · 物理学 2018-03-23 Xi Chen , Zheng-Zhe Lin

We study the exchange interaction and the subsequent collective behavior of magnetic impurities embedded in a disordered two-dimensional (2D) helical metal. The exchange coupling follows a statistical distribution whose moments are…

介观与纳米尺度物理 · 物理学 2015-09-02 Hector Ochoa

VO2 samples are grown with different oxygen concentrations leading to different monoclinic, M1 and triclinic, T insulating phases which undergo a first order metal to insulator transition (MIT) followed by a structural phase transition…

材料科学 · 物理学 2017-05-12 Raktima Basu , Manas Sardar , Santanu Bera , P. Magudapathy , Sandip Dhara

Three-dimensional topological semimetals host a range of interesting quantum phenomena related to band crossing that give rise to Dirac or Weyl fermions, and can be potentially engineered into novel quantum devices. Harvesting the full…

Inducing magnetic moment in otherwise nonmagnetic two-dimensional semiconducting materials is the key first step to design spintronic materials. Here, we study the absorption of transition-metals on pristine and defected single-layer…

介观与纳米尺度物理 · 物理学 2016-07-05 Rohit Babar , Mukul Kabir

A mechanism of perfect plasticity under low homological temperatures has been suggested. According to this mechanism, the phenomenon under study is of critical nature. It connects with percolation transition in the net of grain boundaries…

材料科学 · 物理学 2012-06-25 Yan Beygelzimer , Natalia Lavrinenko

The elucidation of nonequilibrium states in strongly correlated systems holds the key to emergence of novel quantum phases. The nonequilibrium-induced insulator-to-metal transition is particularly interesting since it reflects the…

强关联电子 · 物理学 2022-08-05 Kazuya Shinjo , Shigetoshi Sota , Takami Tohyama

Quantum material phases such as the Anderson insulator, diffusive metal, and Weyl/Dirac semimetal as well as topological insulators show specific wave functions both in real and Fourier spaces. These features are well captured by…

介观与纳米尺度物理 · 物理学 2019-11-19 Tomohiro Mano , Tomi Ohtsuki

Understanding heat transport in low-dimensional and nano-architectured materials remains a central challenge in nonequilibrium statistical physics due to persistent deviations from Fourier's law. These deviations are driven by…

介观与纳米尺度物理 · 物理学 2026-05-15 R. A. C. Correa , K. N. M. Sharma , P. Lolur , J. van Velzen

We present the metal - insulator transition study of a quantum site percolation model on simple cubic lattice. Transfer matrix method is used to calculate transport properties - Landauer conductance - for the binary distribution of…

强关联电子 · 物理学 2009-11-13 Igor Travenec

We propose a strategy to obtain conducting organic materials with fully spin-polarized Fermi surface, lying at a singular flat band, with antiferromagnetically coupled magnetic moments that reside in pi-orbitals of nanographenes. We…

介观与纳米尺度物理 · 物理学 2026-04-17 J. Phillips , J. C. G. Henriques , J. Fernández-Rossier , A. T. Costa

We thoroughly analyze the divergences of the irreducible vertex functions occurring in the charge channel of the half-filled Hubbard model in close proximity to the Mott metal-insulator transition (MIT). In particular, by systematically…

强关联电子 · 物理学 2023-11-21 Mathias Pelz , Severino Adler , Matthias Reitner , Alessandro Toschi

Semi-holography, originally proposed as a model for conducting lattice electrons coupled to a holographic critical sector, leads to an effective theory of non-Fermi liquids with only a few relevant interactions on the Fermi surface in the…

高能物理 - 理论 · 物理学 2025-01-03 Benoit Doucot , Ayan Mukhopadhyay , Giuseppe Policastro , Sutapa Samanta , Hareram Swain

Amorphous solids exhibit quasi-universal low-temperature anomalies whose origin has been ascribed to localized tunneling defects. Using an advanced Monte Carlo procedure, we create {\it in silico} glasses spanning from hyperquenched to…

无序系统与神经网络 · 物理学 2020-06-17 Dmytro Khomenko , Camille Scalliet , Ludovic Berthier , David R. Reichman , Francesco Zamponi

Transition metal dichalcogenides exhibit a wide range of semiconducting, metallic, correlated, and topological electronic states that arise from strong coupling between lattice structure, dimensionality, and electronic degrees of freedom.…

材料科学 · 物理学 2026-05-19 Anzar Ali , Md Ezaz Hasan Khan , Mahmoud Abdel-Hafiez