Article
Multidisciplinary Sciences
Kajetan M. Fijalkowski, Nan Liu, Pankaj Mandal, Steffen Schreyeck, Karl Brunner, Charles Gould, Laurens W. Molenkamp
Summary: Researchers have discovered the existence of chiral edge channels in a magnetic topological insulator up to a temperature of 20 K, compared to the current limit of 20 mK for achieving metrological precision of quantum anomalous Hall resistance quantization. The study provides insights into a major open question surrounding the quantum anomalous Hall effect, and reveals the reason behind this discrepancy through careful analysis of non-local voltages.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Amartya Saha, Suman Jyoti De, Sumathi Rao, Yuval Gefen, Ganpathy Murthy
Summary: The study reveals that the system chooses one of two distinct edge/interface phases depending on the strength of interactions and the width of the interface. Phase A, stable for wide interfaces, features spin as a good quantum number with no gapless long-wavelength spin fluctuations, while phase B, stable for narrow interfaces, exhibits spontaneous breaking of spin symmetry at the Hartree-Fock level, leading to the emergence of gapless long-wavelength spin excitations bound to the interface.
Article
Chemistry, Multidisciplinary
Xihan Chen, Haipeng Lu, Kang Wang, Yaxin Zhai, Vladimir Lunin, Peter C. Sercel, Matthew C. Beard
Summary: Metal-halide perovskite semiconductors show potential for opto-spintronic applications by manipulating charge and spin degrees of freedom to reduce power consumption and achieve faster switching times. Tuning excitation density and exciton binding energy can lead to long spin lifetimes in these systems, with different mechanisms dominating at low and high excitation densities.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Ryota Konuma, Chaojing Lin, Tokuro Hata, Taichi Hirasawa, Takafumi Akiho, Koji Muraki, Toshimasa Fujisawa
Summary: This study investigates heat transport in multiple quantum Hall edge channels at Landau-level filling factors v = 2, 4, and 8. The heat distribution among the channels remains highly nonuniform and can be explained by the plasmon eigenmodes. The heat transport can be controlled with a quantized heat valve, as evidenced by stepwise increases of heat current at the local thermometer.
Article
Physics, Multidisciplinary
Giacomo Rebora, Dario Ferraro, Ramiro H. Rodriguez, Francois D. Parmentier, Patrice Roche, Maura Sassetti
Summary: This study investigates the evolution of peak height of energy-resolved electronic wave-packets along integer quantum Hall edge channels at filling factor two, considering elastic scattering amplitudes, short-range capacitive coupling between edges, and energy dissipation towards additional degrees of freedom. By comparing with experimental data, it rules out non-dissipative and quadratic dependence of dissipation, indicating a linear energy loss rate as the best candidate for describing the behavior of quasi-particle peaks at short propagation lengths.
Article
Chemistry, Multidisciplinary
Marcos Rubin-Osanz, Francois Lambert, Feng Shao, Eric Riviere, Regis Guillot, Nicolas Suaud, Nathalie Guihery, David Zueco, Anne-Laure Barra, Talal Mallah, Fernando Luis
Summary: This research reports a significant quantum tunnelling splitting between the two lowest electronic spin levels of mononuclear Ni complexes, with the magnetic clock transition being directly monitored through heat capacity experiments. The study also shows that the clock transition effectively suppresses intermolecular spin-spin interactions and that the quantum tunnelling splitting can be chemically tuned by modifying the ligand shell. These properties are important for realizing model spin qubits with resistance against decoherence, proper interfacing with other qubits and control circuits, and the ability to initialize them through cooling.
Article
Chemistry, Multidisciplinary
Bin Cao, Tobias Grass, Olivier Gazzano, Kishan Ashokbhai Patel, Jiuning Hu, Markus Muller, Tobias Huber-Loyola, Luca Anzi, Kenji Watanabe, Takashi Taniguchi, David B. Newell, Michael Gullans, Roman Sordan, Mohammad Hafezi, Glenn S. Solomon
Summary: By accurately measuring the photocurrent signal and modeling the data using optical Bloch equations, we have studied the relaxation of carriers in graphene in the quantum Hall regime. Our results provide a unified understanding of the relaxation processes in graphene over different magnetic field strength regimes and show clear evidence of carrier multiplication. Additionally, our findings reveal the interplay of Coulomb interactions and interactions with acoustic and optical phonons, as well as the chiral transport properties and chirality change at the Dirac point in the quantum Hall regime.
Article
Physics, Condensed Matter
Tran C. Phong, Vo T. Lam, Bui D. Hoi
Summary: Perturbation-induced phase transitions in noncentrosymmetric quantum spin Hall insulators were analyzed, with the effects of electric field, dilute charged impurities, and Zeeman splitting field considered in different scenarios. The study showed that the system transitions between band gap opening and semimetallic phases depending on the presence of these perturbations.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Chemistry, Inorganic & Nuclear
Ming Kong, Xin Feng, Jia Wang, Yi-Quan Zhang, You Song
Summary: Four Dy-III complexes were synthesized and studied for their magnetic properties, revealing them to behave as single-molecule magnets with high energy barriers. The orientation of the magnetic axis and the terminal ligands around the Dy-III ions play crucial roles in tuning the magnetic anisotropy and properties of the complexes.
DALTON TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
D. J. P. de Sousa, M. J. Sammon, Raseong Kim, Hai Li, Ian A. Young, Tony Low
Summary: This paper investigates the spin torque induced by the valley Hall effect in monolayer transition metal dichalcogenides. It is found that the spin torque efficiency is comparable to that in conventional perpendicular magnetic tunnel junctions and can be further optimized by adjusting the valley Hall angle in the material. The valley nature of the spin torque results in out-of-plane dampinglike torques in a current-in-plane configuration, with perpendicular charge transport being eliminated, and the torque efficiency can be controlled through electrical tuning.
Article
Materials Science, Ceramics
Xiaoqi Zhao, Yami Ling, Yuanzhao Gou
Summary: Particle size plays a crucial role in up-conversion luminescence tuning and application research. In this study, CeO2:Yb3+/Er3+ nanospheres were synthesized via coprecipitation, and their up-conversion emissions were investigated. The results showed that the nanosphere size decreased as the Yb3+ doping concentration increased, leading to an increase in the red-green emission intensity ratio. This phenomenon might be attributed to the strengthened nonradiative relaxation process and the enhanced energy back-transfer process.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
G. A. R. van Dalum, C. Ortix, L. Fritz
Summary: In this paper, a one-dimensional insulator with approximate chiral symmetry belonging to the AIII class was constructed by intentionally polluting the edge of a two-dimensional quantum spin Hall insulator with magnetic impurities. The resulting bound states hybridize and disperse along the edge, with discussions on the existence of zero-dimensional boundary modes. The construction is independent of impurity lattice details, and the stability of zero modes against disorder and random lattice configurations was confirmed numerically in a microscopic model.
Article
Chemistry, Multidisciplinary
Andrea Giuntoli, Sinan Keten
Summary: Controlling the response of thin films under impact by manipulating their molecular structure is crucial for impact resistance, with correlations identified between Young's modulus, toughness, and penetration energy. These findings provide important guidelines for developing new polymer-based, impact-resistant nanomaterials.
CELL REPORTS PHYSICAL SCIENCE
(2021)
Article
Multidisciplinary Sciences
Jong-Guk Choi, Jaehyeon Park, Min-Gu Kang, Doyoon Kim, Jae-Sung Rieh, Kyung-Jin Lee, Kab-Jin Kim, Byong-Guk Park
Summary: This study shows that the frequency of SHNOs can be controlled up to 2.1 GHz by an electric field, enabling large frequency tuning. The voltage-controlled frequency tuning of SHNOs facilitates the development of energy-efficient neuromorphic devices. Additionally, repetitive voltage pulses can be used to cumulatively control the frequency, mimicking the functions of biological synapses.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
G. Rebora, D. Ferraro, M. Sassetti
Summary: The study explores the quantum fluctuations of electromagnetic radiation generated by a quantum Hall device in a quantum point contact geometry, with a focus on electron-electron interactions at filling factor two. By analyzing current fluctuations at finite frequency, the research evaluates quantum features such as squeezing, comparing the effects of cosine wave and Lorentzian pulse excitation drives. Despite interactions reducing quantum features in both cases, the Lorentzian drive retains a strong squeezing effect, potentially significant for quantum information applications.
NEW JOURNAL OF PHYSICS
(2021)
Review
Instruments & Instrumentation
N. Casali, F. Bellini, M. Calvo, L. Cardani, M. G. Castellano, C. Cosmelli, A. Cruciani, S. Di Domizio, P. Fresch, J. Goupy, M. Martinez, A. Monfardini, G. Pettinari, H. le Sueur, M. Vignati
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2019)
Article
Physics, Applied
Udson C. Mendes, Sebastien Jezouin, Philippe Joyez, Bertrand Reulet, Alexandre Blais, Fabien Portier, Christophe Mora, Carles Altimiras
PHYSICAL REVIEW APPLIED
(2019)
Article
Physics, Multidisciplinary
C. Rolland, A. Peugeot, S. Dambach, M. Westig, B. Kubala, Y. Mukharsky, C. Altimiras, H. le Sueur, R. Joyez, D. Vion, P. Roche, D. Esteve, J. Ankerhold, F. Portier
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Applied
L. Tosi, D. Vion, H. le Sueur
PHYSICAL REVIEW APPLIED
(2019)
Review
Physics, Multidisciplinary
Anne Anthore, Dante M. Kennes, Edouard Boulat, Sabine Andergassen, Frederic Pierre, Volker Meden
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2020)
Article
Physics, Applied
I Colantoni, C. Bellenghi, M. Calvo, R. Camattari, L. Cardani, N. Casali, A. Cruciani, S. Di Domizio, J. Goupy, V Guidi, H. Le Sueur, M. Martinez, A. Mazzolari, A. Monfardini, V Pettinacci, G. Pettinari, M. Romagnoni, M. Vignati
JOURNAL OF LOW TEMPERATURE PHYSICS
(2020)
Article
Physics, Multidisciplinary
A. Murani, N. Bourlet, H. le Sueur, F. Portier, C. Altimiras, D. Esteve, H. Grabert, J. Stockburger, J. Ankerhold, P. Joyez
Article
Physics, Applied
N. Casali, C. Bellenghi, M. Calvo, L. Cardani, G. Castellano, I Colantoni, C. Cosmelli, A. Cruciani, S. Di Domizio, J. Goupy, M. Martinez, A. Monfardini, G. Pettinari, H. le Sueur, M. Vignati
JOURNAL OF LOW TEMPERATURE PHYSICS
(2020)
Editorial Material
Physics, Multidisciplinary
A. Murani, N. Bourlet, H. le Sueur, F. Portier, C. Altimiras, D. Esteve, H. Grabert, J. Stockburger, J. Ankerhold, P. Joyez
Summary: In their Comment, Hakonen and Sonin object to the conclusion on the absence of a dissipation-induced superconducting-to-insulating quantum phase transition in RSJJs originally predicted by SB. Their objections are based on a theory explaining the DQPT in terms of Bloch bands developed in the 1980s and early 1990s. In this Reply, the authors point out several issues in the Comment that weaken the objections formulated by HS against their work.
Article
Physics, Multidisciplinary
A. Peugeot, G. Menard, S. Dambach, M. Westig, B. Kubala, Y. Mukharsky, C. Altimiras, P. Joyez, D. Vion, P. Roche, D. Esteve, P. Milman, J. Leppaekangas, G. Johansson, M. Hofheinz, J. Ankerhold, F. Portier
Summary: The experiment demonstrates that a dc-biased Josephson junction in series with two microwave resonators emits entangled beams of microwaves. By measuring second-order coherence functions, the entanglement of the outgoing beams is proven despite the limitation of low-frequency noise from the dc bias. The agreement between experimental results and theory allows for evaluation of the entropy of entanglement, estimation of entanglement flux, and identification of ways to improve the device's performance as a bright source of entangled microwaves for quantum-technological applications.
Article
Physics, Multidisciplinary
G. C. Menard, A. Peugeot, C. Padurariu, C. Rolland, B. Kubala, Y. Mukharsky, Z. Iftikhar, C. Altimiras, P. Roche, H. le Sueur, P. Joyez, D. Vion, D. Esteve, J. Ankerhold, F. Portier
Summary: In this paper, we observe the emission of photon bunches by a circuit made of a microwave resonator and a voltage-biased tunable Josephson junction. We show that the emission of photon bunches can be explained quantitatively by treating the system using a rotating-wave approximation. Through experimental measurements, we also determine the Fano factor of the emitted microwave radiation.
Article
Physics, Multidisciplinary
H. Duprez, F. Pierre, E. Sivre, A. Aassime, F. D. Parmentier, A. Cavanna, A. Ouerghi, U. Gennser, I Safi, C. Mora, A. Anthore
Summary: The study investigates the dynamical Coulomb blockade suppression of electrical conductance across an electronic quantum channel subject to a temperature difference. By analyzing experimental data and theoretical models, researchers were able to explain the variations in conductance under different temperature conditions effectively.
PHYSICAL REVIEW RESEARCH
(2021)
