Article
Materials Science, Multidisciplinary
Jiangfan Wang, Yi-feng Yang
Summary: Metallic spin liquid has been observed in correlated metals, but a satisfactory theoretical description is lacking. This study proposes a potential approach to achieve metallic spin liquid by constructing an effective gauge theory with charged fractionalized excitations on the triangular Kondo lattice. The resulting Z(2) metallic spin liquid exhibits long-lived, heavy holon excitations of spin 0 and charge +e, as well as a partially enlarged electron Fermi surface.
Article
Physics, Multidisciplinary
Salvatore D. Pace, Siddhardh C. Morampudi, Roderich Moessner, Chris R. Laumann
Summary: Quantum spin ice, as a unique condensed-matter system, displays significant differences in microstructure and parameters from standard quantum electrodynamics, with parameters tunable by adjusting the microscopic Hamiltonian. Its high fine structure constant implies that experiments may observe phenomena arising from strong interactions.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Sambuddha Sanyal, Kedar Damle, J. T. Chalker, R. Moessner
Summary: This study presents an exactly solvable example of a SU(2) symmetric Majorana spin liquid phase, where strong disorder results in a random-singlet phenomenon of emergent magnetic moments. The low temperature susceptibility χ(T) is controlled by a strong-disorder fixed point in an S = 1/2 model on a decorated honeycomb lattice with vacancy and/or bond disorder. The response of a random singlet phase is a common feature in both vacancy-induced spin textures and bond disorder, reminiscent of other systems like random antiferromagnetic spin chains and phosphorus-doped silicon (Si:P).
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Jiangfan Wang, Yi-Feng Yang
Summary: Magnetic frustrations can enhance quantum fluctuations and lead to exotic topological insulating states in spin systems. When coupled to mobile electrons, they may give rise to unusual non-Fermi liquid or metallic spin liquid states whose nature has not been well explored. By considering a spin current Kondo mechanism in a frustrated Kondo model, a series of non-Fermi liquid phases can be formed.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Astronomy & Astrophysics
Daiki Suenaga, Yasufumi Araki, Kei Suzuki, Shigehiro Yasui
Summary: We propose a new mechanism for heavy-quark spin polarization in quark matter induced by the Kondo effect under an external magnetic field. Through coupling between light quarks and the magnetic field in quark matter, the HQSP is driven by the Kondo effect. The results show a significant increase in HQSP with the appearance of the Kondo effect, which can be tested in future sign-problem-free lattice simulations.
Article
Materials Science, Multidisciplinary
Damian Tomaszewski, Piotr Busz, Jan Martinek
Summary: This paper provides a detailed theoretical description of the influence of spin accumulation in metallic Fermi leads on the Kondo effect in systems such as quantum dots and Kondo alloys. The study shows that the presence of spin accumulation, magnetic field, and ferromagnetic leads spin polarization can suppress the Kondo effect, but for appropriately selected parameter values, these effects can compensate each other and may lead to the restoration of the Kondo effect in the analyzed systems. The paper also discusses recent experiments related to spin current in Kondo alloys.
Article
Materials Science, Multidisciplinary
Alexei M. Tsvelik, Piers Coleman
Summary: We describe a mechanism of order fractionalization in a two-dimensional Kondo lattice model, where electrons interact with a spin liquid of Majorana fermions described by the Yao-Lee model. When the Kondo coupling exceeds a critical value, the model undergoes a superconducting instability characterized by a spinor order parameter with specific charge and spin. By introducing a gauge string, we show the development of off-diagonal long-range order in the spinorial order, allowing electrons to tunnel coherently through the spin liquid over arbitrary distances.
Article
Multidisciplinary Sciences
Pedro J. Saenz, Giuseppe Pucci, Sam E. Turton, Alexis Goujon, Rodolfo R. Rosales, Jorn Dunkel, John W. M. Bush
Summary: The passage introduces hydrodynamic spin lattices (HSLs) of 'walking' droplets as a class of active spin systems with particle-wave coupling, revealing various non-equilibrium symmetry-breaking phenomena that can be controlled by varying lattice geometry and system rotation. Theoretical predictions based on a generalized Kuramoto model rationalize experimental observations, establishing HSLs as a versatile platform for exploring active phase oscillator dynamics. The tunability of HSLs suggests exciting directions for future research, from active spin-wave dynamics to hydrodynamic analogue computation and droplet-based topological insulators.
Article
Physics, Multidisciplinary
Aniekan Magnus Ukpong
Summary: In this study, the signatures of Kondo resonance effect are elucidated in quantum dots derived from a carbon-nanoline embedded monolayer hexagonal boron nitride. The quantum transport state of mesoscopic devices modelled as quantum dots tunnel coupled to metallic leads is computed by direct diagonalization of the Hamiltonian. It is found that the embedded carbon nanoline in the quantum dots has a broken particle-hole symmetry.
FRONTIERS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Yang Ge, Yashar Komijani
Summary: Researchers have studied the two-channel Kondo lattice model using a dynamical large-N technique and renormalization group ideas, going beyond the independent bath approximation. They found that the Kondo effect results in dynamic magnetic correlations and the emergence of spinon dispersion. Additionally, they developed a quantitative framework that interpolates between different dimensions.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Wesley T. Fuhrman, Andrey Sidorenko, Jonathan Haenel, Hannes Winkler, Andrey Prokofiev, Jose A. Rodriguez-Rivera, Yiming Qiu, Peter Blaha, Qimiao Si, Collin L. Broholm, Silke Paschen
Summary: The study investigates the Kondo semimetal CeRu4Sn6 by magnetic susceptibility, specific heat, and inelastic neutron scattering experiments, revealing that this compound is quantum critical without tuning and that temperature is the only energy scale in the criticality.
Article
Multidisciplinary Sciences
Anuva Aishwarya, Zhuozhen Cai, Arjun Raghavan, Marisa Romanelli, Xiaoyu Wang, Xu Li, G. D. Gu, Mark Hirsbrunner, Taylor Hughes, Fei Liu, Lin Jiao, Vidya Madhavan
Summary: Incorporating relativistic physics into quantum tunneling can lead to exotic behavior such as perfect transmission through Klein tunneling. In this study, tunneling properties of spin-momentum-locked relativistic fermions were probed using nanowires made of the topological Kondo insulator candidate samarium hexaboride. The nanowires were attached to scanning tunneling microscope tips to image the bicollinear stripe spin order in the antiferromagnet Fe1.03Te with a Neel temperature of about 50 kelvin.
Article
Physics, Particles & Fields
Markus Q. Huber, Christian S. Fischer, Helios Sanchis-Alepuz
Summary: In this study, we calculate the glueball spectrum for spin up to J = 4 and positive charge parity in pure Yang-Mills theory. By constructing full bases for J = 0, 1, 2, 3, 4 and discussing the relation to gauge invariant operators, we obtain ground states and first and second excited states from extrapolations of the eigenvalue curves using a fully self-contained truncation of Dyson-Schwinger equations as input. Comparing our results with available lattice results, we find good quantitative agreement.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Multidisciplinary
Limin She, Zhitao Shen, Zhenyang Xie, Limei Wang, Yeheng Song, Xue-Sen Wang, Yu Jia, Zhenyu Zhang, Weifeng Zhang
Summary: By utilizing the semimetallic nature of antimony, researchers have observed that the spin of Cophthalocyanine is well preserved on Sb(111), showing potential for high-density magnetic memory devices.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Dmitry Green, Claudio Chamon
Summary: We have constructed Hamiltonians that show an exact non-Abelian gauge symmetry with only 1-and 2-body interactions. Our spin Hamiltonian realizes the quantum double associated to the group of quaternions. It is an explicit example of a spin Hamiltonian that has no sign problem and achieves a non-Abelian topological phase. Additionally, we propose a superconducting quantum circuit version with the same symmetry.
