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We investigate the sliding of objects on an inclined granular surface close to the avalanche threshold. Our experiments show that the stability is driven by the surface deformations. Heavy objects generate footprint-like deformations which…

软凝聚态物质 · 物理学 2017-08-09 Jérôme Crassous , Antoine Humeau , Samuel Boury , Jérôme Casas

Molybdenum disulfide has recently emerged as a promising two-dimensional semiconducting material for nano-electronic, opto-electronic and spintronic applications. However, demonstrating spin-transport through a semiconducting MoS2 channel…

As an ideal platform, both the theoretical prediction and first experimental verification of chiral phonons are based on transition-metal dichalcogenide materials. The manipulation of phonon chirality in these materials will have a profound…

材料科学 · 物理学 2024-05-21 Hao Chen , Qianqian Wang , Xukun Feng , Weikang Wu , Lifa Zhang

Microstructural evolution in metallic materials feedbacks with the loading conditions and influences the life time of parts and components. Therefore, the deformation mechanisms have to be fundamentally understood. Tribological loading…

Two-dimensional transition metal carbides and nitrides (MXenes) are a perspective group of materials with a broad palette of applications. Surface terminations are a product of the MXene preparation, and post-processing can also lead to…

材料科学 · 物理学 2024-07-18 Barbora Vénosová , František Karlický

We present the result of a systematic study of the tribological properties of industrial Polytetrafluorethylene (PTFE)-based coatings carried out with an atomic force microscope. A new characterization protocol allowed the reliable and…

材料科学 · 物理学 2017-06-21 A. Podesta' , G. Fantoni , P. Milani , C. Guida , S. Volponi

The discovery of superconductivity in twisted bilayer and twisted trilayer graphene has generated tremendous interest. The key feature of these systems is an interplay between interlayer coupling and a moir\'e superlattice that gives rise…

Superconductivity commonly appears under pressure in charge density wave (CDW)-bearing transition metal dichalcogenides (TMDs), but has emerged so far only via either intercalation with electron donors or electrostatic doping in CDW-free…

Static friction induced by moir\'e superstructure in twisted incommensurate finite layered material interfaces reveals unique double periodicity and lack of scaling with contact size. The underlying mechanism involves compensation of…

应用物理 · 物理学 2023-08-08 Weidong Yan , Xiang Gao , Wengen Ouyang , Ze Liu , Oded Hod , Michael Urbakh

A theoretical model is proposed for low temperature friction between two smooth rigid solid surfaces separated by lubricant molecules, admitting their deformations and rotations. Appearance of different modes of energy dissipation (by…

材料科学 · 物理学 2009-11-10 V. M. Loktev , Yu. G. Pogorelov

Transition metal dichalcogenides (TMDs) are layered materials that have a semiconducting phase with many advantageous optoelectronic properties, including tightly bound excitons and spin-valley locking. In Tungsten-based TMDs, spin and…

介观与纳米尺度物理 · 物理学 2022-04-27 Saroj B. Chand , John M. Woods , Enrique Mejia , Takashi Taniguchi , Kenji Watanabe , Gabriele Grosso

Thermal transport property of homogeneous twisted molybdenum disulfide (MoS$_2$) is investigated using non-equilibrium molecular dynamics simulations with the state-of-art force fields. The simulation results demonstrate that the…

计算物理 · 物理学 2023-10-16 Wenwu Jiang , Ting Liang , Jianbin Xu , Wengen Ouyang

The understanding of sliding friction for wet, patterned surfaces from first principles is challenging. While emerging applications have sought design principles from biology, a general framework is lacking because soft interfaces…

软凝聚态物质 · 物理学 2021-04-14 Yunhu Peng , Christopher M. Serfass , Catherine N. Hill , Lilian C. Hsiao

Silicene is an intriguing silicon allotrope with a honeycomb lattice structure similar to graphene with slightly buckled geometry. Molybdenum disulfide (MoS2), on the other hand, is a significant 2D transition metal dichalcogenide that has…

材料科学 · 物理学 2024-06-18 Bishwajit Kar , Plabon Paul , Md Arshadur Rahman , Mohammad Jane Alam Khan

In this present work, friction and wear behavior of UNCD thin film has been studied against three different sliding counterbodies i.e. Al2O3, SiC and steel balls. UNCD/steel sliding pair showed high friction coefficient in the beginning of…

材料科学 · 物理学 2018-06-28 Revati Rani , Niranjan Kumar , I-Nan Lin

Semiconducting transition metal dichalcogenides (TMDs) have emerged as materials that can be used to realize two-dimensional (2D) crystals possessing rather unique transport and optical properties. Most research has so far focused on sulfur…

The field of two-dimensional (2D) materials has expanded to multilayered systems where electronic, optical, and mechanical properties change-often dramatically-with stacking order, thickness, twist, and interlayer spacing [1-5]. For…

材料科学 · 物理学 2019-06-27 Suk Hyun Sung , Noah Schnitzer , Lola Brown , Jiwoong Park , Robert Hovden

The dragging velocity of a model solid lubricant confined between sliding periodic substrates exhibits a phase transition between two regimes, respectively with quantized and with continuous lubricant center-of-mass velocity. The…

材料科学 · 物理学 2012-10-26 A. Vanossi , N. Manini , F. Caruso , G. E. Santoro , E. Tosatti

Tuning physical properties of transition metal dichalcogenide (TMD) monolayers by strain engineering have most widely studied, and recently Janus TMD monolayer MoSSe has been synthesized. In this work, we systematically study biaxial strain…

材料科学 · 物理学 2018-08-01 San-Dong Guo

We studied the drag resistivity between dilute two-dimensional hole systems, near the apparent metal-insulator transition. We find the deviations from the $T^{2}$ dependence of the drag to be independent of layer spacing and correlated with…

介观与纳米尺度物理 · 物理学 2009-11-10 R. Pillarisetty , H. Noh , E. Tutuc , E. P. De Poortere , K. Lai , D. C. Tsui , M. Shayegan