Article
Materials Science, Multidisciplinary
Xiaotian Yang, Weiqing Zhou, Qi Yao, Pengfei Lv, Yunhua Wang, Shengjun Yuan
Summary: This study models the SC fractals formed by hydrogen and fluorine functionalized patterns on graphene surfaces, and investigates their electronic properties and quantum transport features. It is found that the energy states in H-SC and F-SC are localized in different graphene regions, and the conductance fluctuations in these structures follow the Hausdorff dimension.
Article
Physics, Multidisciplinary
N. Arabchigavkani, R. Somphonsane, H. Ramamoorthy, G. He, J. Nathawat, S. Yin, B. Barut, K. He, M. D. Randle, R. Dixit, K. Sakanashi, N. Aoki, K. Zhang, L. Wang, W-N Mei, P. A. Dowben, J. Fransson, J. P. Bird
Summary: Mesoscopic conductance fluctuations are a common feature in small conductors, but this study reveals a breakdown of universality due to the interplay of local and remote phenomena in transport. The experiments demonstrate that remote factors can significantly impact conductivity in phase-coherent conductors, leading to giant conductance fluctuations exceeding theoretical predictions.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Xingfei Wei, Ewa Harazinska, Yinong Zhao, Yi Zhuang, Rigoberto Hernandez
Summary: In this study, the fundamental mechanisms of thermal transport in polymer-linked gold nanoparticle (AuNP) dimers are investigated using all-atom molecular dynamics. The results show that conjugated polymers and low temperatures have larger heat conductance, and the flexibility of the polymer chains affects thermal transport. The study also highlights the significance of phonon boundary scattering and intrinsic phonon scattering on heat conductance.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Thomas Fabian, Lukas Walzek, Joachim Burgdoerfer, Florian Libisch, George Datseris
Summary: This study identifies quasiclassical scattering states associated with well-defined quantum numbers of the valley degree of freedom specific to graphene, allowing for noiseless electron transport. Trigonal warping in the band structure of graphene due to its hexagonal lattice structure results in preferred propagation directions and scattering time delays.
Article
Chemistry, Physical
Edith Leal-Sanchez, Jesus Hernandez-Trujillo
Summary: From a dynamical perspective, single molecule junctions consisting of selected 4,4'-biphenyldithiol and 4,4'-dicyanobiphenyl derivatives bonded to gold electrodes were analyzed. The internal rotation of the biphenyl moiety was described using a fully quantum mechanical approach, and potential energy surfaces were obtained through ab initio electronic structure methods. The impact of substituents on the phenyl rings on the potential energy surfaces and the influence of initial conditions on conformational distribution evolution were investigated. Additionally, the conductances at zero bias for different conformational states were calculated.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Yang Liu, Wenhao Wu, Shixian Yang, Ping Yang
Summary: The thermal transport performance and thermal rectification characteristics of graphene/MoS2 heterointerface (G/M) are comprehensively studied in this paper. The influence of vacancy defects and temperature on the interfacial thermal conductance (G) is investigated. The results provide theoretical support for the application of graphene/MoS2 heterojunctions in heat rectifier devices.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Wenfei Zhang, Guang-Ping Zhang, Zong-Liang Li, Xiao-Xiao Fu, Chuan-Kui Wang, Minglang Wang
Summary: In this study, the spin-resolved transport properties of molecular logic devices composed of Mn porphyrin molecules were investigated using density functional theory and non-equilibrium Green's function. Seven spin polarization configurations were achieved by adjusting the spin orientations of functional molecules and the edges of graphene nanoribbon electrodes. Various spin logic devices such as YES, NOT, OR, NOR, and XOR were successfully created, showing promise for future spintronic integrated circuit design and miniaturization efforts.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Jieren Song, Zhonghai Xu, Xingang Liang, Xiaodong He
Summary: In this study, the thermal transport mechanism of GE/GCN composite films was investigated using molecular dynamics simulations. The findings reveal that the vertical thermal transport is influenced by factors such as layer number, defect concentration, temperature, and strain, while the in-plane thermal transport is related to the size, defect concentration, temperature, and strain of GE and GCN.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Tingwei Gao, Chunhui He, Chenguang Liu, Yinqi Fan, Cezhou Zhao, Chun Zhao, Weitao Su, Yannick J. Dappe, Li Yang
Summary: The use of graphene as a new type of electrode at molecular junctions has led to enhanced conductance for longer molecules. Studies involving oligopthiophene based hybrid gold-graphene junctions show similar behavior to alkane-based junctions, as supported by experiments and DFT calculations.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Lei-Lei Nian, Long Bai, Shiqian Hu
Summary: Characterizing electron-vibration interactions at the single-molecule level is a fundamental challenge in molecular electronics. While electron tunneling spectroscopy has emerged as a powerful tool for observing vibration-mediated electron transport, the fluctuation properties of nonthermal vibrations cannot be revealed by simple transport signatures. In this study, fluctuations of nonthermal vibrations in a current-carrying single molecular junction were investigated with and without external laser radiation. The results showed that nonthermal vibrations can be squeezed by molecular coherence when the laser field is turned on, reducing fluctuations below the zero-point level.
Article
Physics, Fluids & Plasmas
N. L. Pessoa, A. L. R. Barbosa, G. L. Vasconcelos, A. M. S. Macedo
Summary: It is found that multifractality is present in the magnetoconductance data of two different types of mesoscopic systems under the influence of a magnetic field. The phenomenon becomes more pronounced when the number of scattering channels is small. The distributions of conductance increments fitted well with q Gaussians, with the parameter q serving as a useful quantitative measure of multifractality in magnetoconductance fluctuations.
Article
Physics, Multidisciplinary
Vladislav D. Kurilovich, Leonid I. Glazman
Summary: This article develops a theory of the nonlocal transport of two counterpropagating nu = 1 quantum Hall edges coupled via a narrow disordered superconductor. Contrary to predictions, the edge states proximitized in this way do not turn into a topological superconductor, but are tuned to the critical point between trivial and topological phases.
Article
Multidisciplinary Sciences
Vladislav D. Kurilovich, Zachary M. Raines, Leonid I. Glazman
Summary: In this study, we develop a theory to understand the charge transport along the quantum Hall edge influenced by a superconductor. We find that Andreev reflection of an edge state is typically suppressed unless there is disorder in the superconductor, which makes it random. Consequently, the conductance of a proximitized segment becomes a stochastic quantity with alternating sign fluctuations and zero average. We also determine the statistical distribution of the conductance and how it depends on electron density, magnetic field, and temperature. Our theory provides an explanation for a recent experiment involving a proximitized edge state.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Yael Avni, Ram M. Adar, David Andelman, Henri Orland
Summary: In this study, the conductivity of ionic solutions was investigated using a stochastic density functional theory and a modified Coulomb interaction. The results showed excellent agreement with experimental data at higher concentrations without any fitting parameters. A compact expression for the conductivity accompanied by a simple analytical approximation was provided.
PHYSICAL REVIEW LETTERS
(2022)
Article
Thermodynamics
Cun-Hai Wang, Hao Bian, Chong -Chao Pan, Ze-Yi Jiang
Summary: We propose a near-field thermal rectifier based on the InSb/graphene/3C-SiC-nanowire heterostructure, which can significantly enhance the performance of thermal rectifiers by utilizing near-field radiative heat transfer. The rectifier consists of two terminals, one of which is an InSb slab with a graphene-coated bottom, and the other is a 3C-SiC nanowire array with a graphene cover on top. By using fluctuational electrodynamics, we calculate the radiation heat flux and the corresponding thermal rectification efficiency (TRE). The results show that the strong asymmetric surface plasmon polaritons (SPPs) and hyperbolic phonon polaritons (HPPs) guarantee a robust TRE in both forward and reverse heat transfer scenarios.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Physics, Applied
Shamashis Sengupta, Chuan Li, Cedric Baumier, Alik Kasumov, S. Gueron, H. Bouchiat, F. Fortuna
APPLIED PHYSICS LETTERS
(2015)
Editorial Material
Astronomy & Astrophysics
Helene Bouchiat, Jacques Villain
COMPTES RENDUS PHYSIQUE
(2016)
Article
Multidisciplinary Sciences
Anil Murani, Alik Kasumov, Shamashis Sengupta, Yu A. Kasumov, V. T. Volkov, I. I. Khodos, F. Brisset, Raphaelle Delagrange, Alexei Chepelianskii, Richard Deblock, Helene Bouchiat, Sophie Gueron
NATURE COMMUNICATIONS
(2017)
Article
Physics, Condensed Matter
R. Delagrange, R. Weil, A. Kasumov, M. Ferrier, H. Bouchiat, R. Deblock
PHYSICA B-CONDENSED MATTER
(2018)
Article
Physics, Multidisciplinary
T. Wakamura, F. Reale, P. Palczynski, S. Gueron, C. Mattevi, H. Bouchiat
PHYSICAL REVIEW LETTERS
(2018)
Article
Multidisciplinary Sciences
F. Chiodi, S. L. Bayliss, L. Barast, D. Debarre, H. Bouchiat, R. H. Friend, A. D. Chepelianskii
NATURE COMMUNICATIONS
(2018)
Article
Physics, Multidisciplinary
Frank Schindler, Zhijun Wang, Maia G. Vergniory, Ashley M. Cook, Anil Murani, Shamashis Sengupta, Alik Yu. Kasumov, Richard Deblock, Sangjun Jeon, Ilya Drozdov, Helene Bouchiat, Sophie Gueron, Ali Yazdani, B. Andrei Bernevig, Titus Neupert
Article
Materials Science, Multidisciplinary
B. Dassonneville, A. Murani, M. Ferrier, S. Gueron, H. Bouchiat
Article
Materials Science, Multidisciplinary
R. Delagrange, J. Basset, H. Bouchiat, R. Deblock
Proceedings Paper
Physics, Condensed Matter
Chuan Li, Sophie Gueron, Helene Bouchiat
Article
Materials Science, Multidisciplinary
A. Murani, A. Chepelianskii, S. Gueron, H. Bouchiat
Article
Materials Science, Multidisciplinary
Chuan Li S. Gueron, A. Chepelianskii, H. Bouchiat
Article
Materials Science, Multidisciplinary
R. Delagrange, R. Weil, A. Kasumov, M. Ferrier, H. Bouchiat, R. Deblock
Article
Materials Science, Multidisciplinary
Chuan Li, Katsuyoshi Komatsu, S. Bertrand, G. Clave, S. Campidelli, A. Filoramo, S. Gueron, H. Bouchiat
Article
Materials Science, Multidisciplinary
Mircea Trif, Olesia Dmytruk, Helene Bouchiat, Ramon Aguado, Pascal Simon
