Article
Physics, Multidisciplinary
C. L. Kane
Summary: We introduce a nonlinear frequency-dependent D +1 terminal conductance that characterizes a D-dimensional Fermi gas, generalizing the Landauer conductance in D = 1. We show that for a 2D ballistic conductor, this conductance is quantized and can probe the Euler characteristic of the Fermi sea. We also critically analyze the roles of electrical contacts and Fermi liquid interactions, and propose experiments on 2D Dirac materials, such as graphene, using a triple point contact geometry.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Yuhao Wang, Fangting Chen, Wenyu Song, Zuhan Geng, Zehao Yu, Lining Yang, Yichun Gao, Ruidong Li, Shuai Yang, Wentao Miao, Wei Xu, Zhaoyu Wang, Zezhou Xia, Hua-Ding Song, Xiao Feng, Tiantian Wang, Yunyi Zang, Lin Li, Runan Shang, Qikun Xue, Ke He, Hao Zhang
Summary: Reducing disorder and achieving ballistic transport are crucial in Majorana nanowire experiments. In this study, ballistic PbTe nanowire devices were grown using the selective-area-growth technique, and quantized conductance plateaus were observed at zero magnetic field. This advancement in diminishing disorder within nanowires addresses the concern of valley degeneracy and may enable the search for clean signatures of the spin-orbit helical gap in future devices.
Article
Materials Science, Multidisciplinary
Z. Cheng, W. Lu, J. Shi, D. Tanaka, N. H. Protik, S. Wang, M. Iwaya, T. Takeuchi, S. Kamiyama, I. Akasaki, H. Amano, S. Graham
Summary: This study investigated the temperature-dependent thermal conductivity of doped epitaxial 6H-SiC and monocrystalline porous 6H-SiC below room temperature using time-domain thermoreflectance, revealing strong quasi-ballistic thermal transport. Doping and structural boundaries were applied to tune the quasi-ballistic thermal transport, with observations on the selective scattering effects of nitrogen and boron dopants on phonon transport.
MATERIALS TODAY PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Ke Wang, T. A. Sedrakyan
Summary: Perpendicular magnetic field introduces an anomalous interaction correction to the static conductivity of doped graphene, leading to a proportional relationship between magnetoresistance and inverse temperature. This behavior originates from field-induced breaking of symmetry.
Article
Engineering, Electrical & Electronic
Evgeny Mikheev, Ilan T. Rosen, Johannes Kombe, Francois Damanet, Marc A. Kastner, David Goldhaber-Gordon
Summary: This study reports the challenges in exploring quantum effects in SrTiO3 nanostructures and proposes a highly mobile, gate-tunable, and nanoscale-wide device. The correlation properties of the two-dimensional electron gas channel suggest its significant potential in the field of superconductivity.
NATURE ELECTRONICS
(2023)
Article
Physics, Applied
E. J. Robles-Raygoza, V. G. Ibarra-Sierra, J. C. Sandoval-Santana, R. Carrillo-Bastos
Summary: Graphene nanoribbons (GNRs) are natural waveguides for electrons in graphene, but their conductance is suppressed due to scattering with edge disorder. This paper explores the use of strain folds and scalar potentials as internal waveguides to isolate specific modes from edge disorder and improve conductance. The study finds that the presence of internal waveguiding leads to an improvement in electronic conductance of GNRs, with quasi-ballistic properties and robustness against edge disorder.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
P. Zavitsanos, X. Zotos
Summary: The proposed model accounts for the relationship between magnetic and phononic transport, offering a new interpretation for experimental results and highlighting the ballistic character of magnetic transport.
Article
Physics, Multidisciplinary
Pankaj Bhalla, Ming-Xun Deng, Rui-Qiang Wang, Lan Wang, Dimitrie Culcer
Summary: Topological edge states show dissipationless transport. Nonlinear electrical response of ballistic TES confirms the presence of symmetry breaking terms, such as deviations from nonlinearity. The direction of nonlinear response is determined by the spin orientation with respect to the Zeeman field.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Lukas Seemann, Angelika Knothe, Martina Hentschel
Summary: This study developed a trajectory-tracing algorithm that takes into account the electronic properties and confinement details of the material. It investigates the influence of bilayer graphene's dispersion on the dynamics of its charge carriers.
Article
Physics, Applied
Roman Anufriev, Yunhui Wu, Masahiro Nomura
Summary: The article discusses the significance of ballistic thermal transport at the nanoscale and experimental demonstrations in semiconductor nanowires. Research reveals a controversy regarding ballistic conduction, with future experiments expected to resolve the issue.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Yingru Song, Geoff Wehmeyer
Summary: Phonon ray tracing calculations have been used to quantify phonon boundary scattering in nanomaterials and to interpret thermal conductivity measurements. However, Landauer-based phonon ray tracing methods have not been able to access the temperature or heat flux profiles within nanomaterials, meaning that computationally intensive Boltzmann Transport Equation solvers are needed. We derive and apply phonon Monte Carlo ray tracing methods to calculate the local temperature and heat flux in semiconducting nanomaterials, focusing on the ballistic transport regime.
MATERIALS TODAY PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Van Huy Nguyen, Dinh Cong Nguyen, Sunil Kumar, Minwook Kim, Dongwoon Kang, Yeonjae Lee, Naila Nasir, Malik Abdul Rehman, Thi Phuong Anh Bach, Jongwan Jung, Yongho Seo
Summary: The transport behavior of two-terminal graphene ballistic devices was investigated, showing strong nonlinear I-V characteristic curves with a maximum asymmetry ratio of 1.58. An analytical model using a specular reflection mechanism of particles was demonstrated to simulate the behavior, which reasonably fit with the overall trend of the asymmetry ratio depending on the geometry.
NPJ 2D MATERIALS AND APPLICATIONS
(2021)
Article
Multidisciplinary Sciences
Sebastian Heedt, Marina Quintero-Perez, Francesco Borsoi, Alexandra Fursina, Nick van Loo, Grzegorz P. Mazur, Michal P. Nowak, Mark Ammerlaan, Kongyi Li, Svetlana Korneychuk, Jie Shen, May An Y. van de Poll, Ghada Badawy, Sasa Gazibegovic, Nick de Jong, Pavel Aseev, Kevin van Hoogdalem, Erik P. A. M. Bakkers, Leo P. Kouwenhoven
Summary: The study presents an on-chip fabrication technique based on shadow walls to implement topological qubits in an InSb nanowire without the need for fabrication steps such as lithography and etching. This advancement enables the realization of hybrid superconductor-semiconductor quantum devices, ultimately leading to the implementation of topological qubits.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
M. M. Glazov
Summary: This study develops a theory of the valley and spin Hall effects and the resulting accumulation of the valley and spin polarization. It investigates the electron transport in both the ballistic and hydrodynamic regimes, taking into account the effects of anomalous velocity, side-jump, and skew scattering. The polarization magnitude and spatial distribution strongly depend on the transport regime, with significantly larger polarization in the hydrodynamic regime and notable valley and spin polarization near the channel edges due to side-jump and skew scattering mechanisms.
Article
Materials Science, Multidisciplinary
Elina Zhakina, Philippa H. McGuinness, Markus Koenig, Romain Grasset, Maja D. Bachmann, Seunghyun Khim, Carsten Putzke, Philip J. W. Moll, Marcin Konczykowski, Andrew P. Mackenzie
Summary: High-energy electron irradiation is used to study the effects on PtCoO2, and it is found that this technique can transition from nonlocal to local transport behavior, thus determining the nature and extent of unconventional transport regimes.
Article
Veterinary Sciences
Baptiste Barrillot, Johanna Roux, Sebastien Arthaud, Laetitia Averty, Angeline Clair, Anthony Herrel, Paul-Antoine Libourel
JOURNAL OF ZOO AND WILDLIFE MEDICINE
(2018)
Article
Biochemical Research Methods
Bertrand Massot, Sebastien Arthaud, Baptiste Barrillot, Johanna Roux, Gianina Ungurean, Pierre-Herve Luppi, Niels C. Rattenborg, Paul-Antoine Libourel
JOURNAL OF NEUROSCIENCE METHODS
(2019)
Article
Biodiversity Conservation
Morgane Touzot, Loic Teulier, Thierry Lengagne, Jean Secondi, Marc Thery, Paul-Antoine Libourel, Ludovic Guillard, Nathalie Mondy
CONSERVATION PHYSIOLOGY
(2019)
Review
Biochemistry & Molecular Biology
Mark S. Blumberg, John A. Lesku, Paul-Antoine Libourel, Markus H. Schmidt, Niels C. Rattenborg
Article
Clinical Neurology
Sebastien Arthaud, Paul-Antoine Libourel, Pierre-Herve Luppi, Christelle Peyron
Article
Anatomy & Morphology
Francesca Billwiller, Laura Castillo, Heba Elseedy, Anton Ivanovich Ivanov, Jennyfer Scapula, Antoine Ghestem, Julien Carponcy, Paul Antoine Libourel, Helene Bras, Nabila ElSayed Abdelmeguid, Esther Krook-Magnuson, Ivan Soltesz, Christophe Bernard, Pierre-Herve Luppi, Monique Esclapez
BRAIN STRUCTURE & FUNCTION
(2020)
Article
Neurosciences
Laura Facchin, Cornelia Schone, Armand Mensen, Mojtaba Bandarabadi, Federica Pilotto, Smita Saxena, Paul Antoine Libourel, Claudio L. A. Bassetti, Antoine R. Adamantidis
JOURNAL OF NEUROSCIENCE
(2020)
Article
Multidisciplinary Sciences
Gianina Ungurean, Baptiste Barrillot, Dolores Martinez-Gonzalez, Paul-Antoine Libourel, Niels C. Rattenborg
Article
Pharmacology & Pharmacy
Renato Maciel, Risa Yamazaki, Dianru Wang, Anna De Laet, Sebastien Cabrera, Claudio Agnorelli, Sebastien Arthaud, Paul-Antoine Libourel, Patrice Fort, Hyunsook Lee, Claudio Queiroz, Pierre-Herve Luppi
Summary: Using TRAP2 transgenic mice, different neurons were found to be activated during PS and W in the anterior cingulate and rostral and caudal retrosplenial cortices as well as the claustrum. Additionally, during PS, the distribution of neurons in the rRSP and cRSP was limited to superficial layers, in contrast to the widespread activation across all layers during W. These results clearly demonstrate at the cellular level that PS and W are two completely different states in terms of neocortical activation.
BIOCHEMICAL PHARMACOLOGY
(2021)
Article
Clinical Neurology
Risa Yamazaki, Dianru Wang, Anna De Laet, Renato Maciel, Claudio Agnorelli, Sebastien Cabrera, Sebastien Arthaud, Paul-Antoine Libourel, Patrice Fort, Hyunsook Lee, Pierre-Herve Luppi
Summary: The study aimed to investigate the reactivation of neurons in the hippocampus and supramammillary nucleus during wakefulness and paradoxical sleep. The results showed different activated neurons in these regions during wakefulness and paradoxical sleep, and the activation of granule cells in the infrapyramidal blade of the DG during paradoxical sleep. Further research is needed to determine the role of these granule cells in memory reactivation during paradoxical sleep.
Article
Biochemistry & Molecular Biology
Gianina Ungurean, Dolores Martinez-Gonzalez, Bertrand Massot, Paul-Antoine Libourel, Niels C. Rattenborg
Summary: Mammalian pupils respond to various stimuli and reflect the state of the brain. In contrast, pigeons exhibit different pupil behaviors during wakefulness and sleep, potentially due to differences in iris muscle composition and control mechanisms between birds and mammals.
Article
Multidisciplinary Sciences
Gianina Ungurean, Mehdi Behroozi, Leonard Boeger, Xavier Helluy, Paul-Antoine Libourel, Onur Guentuerkuen, Niels C. Rattenborg
Summary: Sleep is important for waste clearance in the brain, with increased cerebral spinal fluid flow during non-rapid eye movement sleep in mice and humans, while decreased flow during rapid eye movement sleep in pigeons.
NATURE COMMUNICATIONS
(2023)
Review
Psychology, Multidisciplinary
Risa Yamazaki, Hirofumi Toda, Paul-Antoine Libourel, Yu Hayashi, Kaspar E. Vogt, Takeshi Sakurai
FRONTIERS IN PSYCHOLOGY
(2020)
Review
Physiology
Paul-Antoine Libourel, Baptiste Barrillot
CURRENT OPINION IN PHYSIOLOGY
(2020)
Meeting Abstract
Clinical Neurology
A. Roman, M. Villalba, P. -A. Libourel, C. Peyron
JOURNAL OF SLEEP RESEARCH
(2018)