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Recent conductance measurements on multi-wall carbon nanotubes (CNTs) reveal an effective behavior similar to disordered single-wall CNTs. This is due to the fact that electric current flows essentially through the outermost shell and is…

介观与纳米尺度物理 · 物理学 2009-11-11 S. Krompiewski , N. Nemec , G. Cuniberti

We report about a combined structural and magnetometric characterization of self-assembled magnetic nanoparticle arrays. Monodisperse iron oxide nanoparticles with a diameter of 20 nm were synthesized by thermal decomposition. The…

介观与纳米尺度物理 · 物理学 2015-05-20 M. J. Benitez , D. Mishra , P. Szary , G. A. Badini Confalonieri , M. Feyen , A. H. Lu , L. Agudo , G. Eggeler , O. Petracic , H. Zabel

We present a systematic study of the electronic and magnetic properties of transition-metal (TM) atomic chains adsorbed on the zigzag single-wall carbon nanotubes (SWNTs). We considered the adsorption on the external and internal wall of…

其他凝聚态物理 · 物理学 2009-11-11 Engin Durgun , Salim Ciraci

Nano engineered spin degree of freedom in carbon system may offer desired exchange coupling with optimum spin orbit interaction which is essential, to construct solid state qubits, for fault tolerant quantum computation. The purpose of this…

原子与分子团簇 · 物理学 2013-08-27 Ashwini P. Alegaonkar , Arvind Kumar , Satish K. Pardeshi , Prashant S. Alegaonkar

The undoped three-orbital spin fermion model for the Fe-based superconductors is studied via Monte Carlo techniques in two-dimensional clusters. At low temperatures, the magnetic and one-particle spectral properties are in good agreement…

强关联电子 · 物理学 2012-08-14 Shuhua Liang , Gonzalo Alvarez , Cengiz Şen , Adriana Moreo , Elbio Dagotto

We consider multi-terminal transport through a flake of rectangular shape of a two-dimensional topological insulator in the presence of an in-plane magnetic field. This system has been shown to be a second-order topological insulator, thus…

介观与纳米尺度物理 · 物理学 2024-02-21 Joseph Poata , Fabio Taddei , Michele Governale

We have performed $^{75}$As and $^{23}$Na nuclear magnetic resonance (NMR) measurements on a single crystal of NaFe$_{0.9835}$Co$_{0.0165}$As and found microscopic coexistence of superconductivity with a two-component spin density wave…

We simulate the electron transport in vertical bi-layer nanowire which can be fabricated in molecular beam epitaxy process with lateral confinement potential formed by means of cleaved overgrowth or surface oxidization methods giving…

介观与纳米尺度物理 · 物理学 2016-01-20 T. Chwiej

High quality heteroepitaxial two-dimensional (2D) InSb layers are very difficult to realize owing to the large lattice mismatch with other widespread semiconductor substrates. A way around this problem is to grow free-standing 2D InSb…

介观与纳米尺度物理 · 物理学 2021-11-05 Isha Verma , Sedighe Salimian , Valentina Zannier , Stefan Heun , Francesca Rossi , Daniele Ercolani , Fabio Beltram , Lucia Sorba

Developing characterization techniques and analysis methods adapted to the investigation of nanoparticles (NPs) is of fundamental importance considering the role of these materials in many fields of research. The study of actinide based…

We present scanning tunneling microscopy measurements on a cleaved surface of the recently discovered superconductor NdO$_{0.7}$F$_{0.3}$BiS$_{2}$ with a transition temperature ($T_{\mathrm{c}}$) of 5.1 K.Tunneling spectra at 4.2 K (below…

超导电性 · 物理学 2014-10-20 T. Machida , Y. Fujisawa , M. Nagao , S. Demura , K. Deguchi , Y. Mizuguchi , Y. Takano , H. Sakata

We present a generalized extension of the recently developed electron/hole-transfer Dynamically-weighted State-Averaged Constrained CASSCF (eDSC/hDSC) method to model charge transfer in the presence of spin-orbit coupling (SOC) for systems…

化学物理 · 物理学 2026-02-13 Alok Kumar , Zhen Tao , Joseph E. Subotnik , Tian Qiu

We address the ballistic transmission of charge carriers across ordered line defects in monolayer transition metal dichalcogenides. Our study reveals the presence of a transport gap driven by spin-orbit interactions, spin and valley…

介观与纳米尺度物理 · 物理学 2016-06-23 Artem Pulkin , Oleg V. Yazyev

The magnetic field-induced 3D ordered phase of the two-leg spin-ladder Cu2(C5N2H12)2Cl4 has been probed through measurements of 1H NMR spectra and 1/T1 in the temperature range 70~mK - 1.2 K. The second order transition line Tc(H) has been…

强关联电子 · 物理学 2007-05-23 H. Mayaffre , M. Horvatic , C. Berthier , M. -H. Julien , P. Segransan , L. Levy , O. Piovesana

First-principles calculations were performed to investigate the electronic structure of two-dimensional (2-D) Ge, Sn, and Pb without and with the presence of an external electric field in combination with spin-orbit coupling. Tight-binding…

A method is introduced to isolate and measure the electrical transport properties of individual single-walled carbon nanotubes (SWNTs) aligned on an ST-cut quartz, from room temperature down to 2 K. The diameter and chirality of the…

介观与纳米尺度物理 · 物理学 2014-08-26 Tohru Watanabe , El-Hadi S. Sadki , Takahide Yamaguchi , Yoshihiko Takano

Two-dimensional (2D) nanoparticle films are a new class of materials with interesting physical properties and applications ranging from nanoelectronics to sensing and photonics. The importance of conducting nanoparticle films makes the…

材料科学 · 物理学 2022-04-12 Lianhua Zhang , Jian Chen , Fei Liu , Zhengyang Du , Yilun Jiang , Min Han , Guanghou Wang

High-pressure torsion (HPT), a technique of severe plastic deformation (SPD), is shown as a promising processing method for exchange-spring magnetic materials in bulk form. Powder mixtures of Fe and SmCo$_{5}$ are consolidated and deformed…

We apply the self-interaction corrected local spin density %(SIC-LSD) approximation to study the electronic structure and magnetic properties of the spinel ferrites MnFe$_{2}$O$_{4}$, Fe$_{3}$O$_{4}$, CoFe$_{2}$O$_{4}$, and…

材料科学 · 物理学 2009-11-11 Z. Szotek , W. M. Temmerman , D. Koedderitzsch , A. Svane , L. Petit , H. Winter

We show how the two-dimensional (2D) topological insulator evolves, by stacking, into a strong or weak topological insulator with different topological indices, proposing a new conjecture that goes beyond an intuitive picture of the…

介观与纳米尺度物理 · 物理学 2015-12-11 Koji Kobayashi , Yukinori Yoshimura , Ken-Ichiro Imura , Tomi Ohtsuki