Article
Materials Science, Multidisciplinary
K. E. Nagaev
Summary: Electron-electron collisions may impact the resistivity of systems with parabolic spectrum and multiply connected Fermi surfaces.
Article
Physics, Multidisciplinary
George Driskell, Samuel Lederer, Carsten Bauer, Simon Trebst, Eun-Ah Kim
Summary: The study demonstrates a new machine-learning approach that can effectively identify non-Fermi liquid physics, providing an important proof-of-principle example for detecting new physics.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Kyungrok Kang, Won June Kim, Dohyun Kim, Sera Kim, Byungdo Ji, Dong Hoon Keum, Suyeon Cho, Young-Min Kim, Sebastien Lebegue, Heejun Yang
Summary: This study presents a physical model to explain the non-Fermi liquid behavior in topological semimetals, successfully quantifying the mechanism of Lifshitz transition. Experimental and computational evidence demonstrate that temperature-induced chemical potential shift in highly doped Nb2Se3 induces non-Fermi liquid behavior.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Keigo Takahashi, Hiroyasu Matsuura, Hideaki Maebashi, Masao Ogata
Summary: We present systematic theoretical results on thermoelectric effects in semimetals based on the variational method of the linearized Boltzmann equation. By treating the inelastic electron-hole scattering more precisely beyond the relaxation-time approximation, we show that the Seebeck coefficient when compensated depends on the screening length of the Coulomb interaction as well as the Lorenz ratio. The result indicates that uncompensated semimetals with the electron-hole scattering have high thermoelectric efficiency when the phonon contribution to thermal conductivity is suppressed.
Review
Physics, Multidisciplinary
Debanjan Chowdhury, Antoine Georges, Olivier Parcollet, Subir Sachdev
Summary: This review focuses on the Sachdev-Ye-Kitaev (SYK) model and its relevance to nonFermi liquids in condensed matter physics. The study explores the phase diagrams of models with local electronic correlations, which display SYK physics. It also investigates the connection between the SYK model and theories of sharp Fermi surfaces without quasiparticles. Furthermore, the review provides an overview of the links between the SYK model and quantum gravity.
REVIEWS OF MODERN PHYSICS
(2022)
Article
Astronomy & Astrophysics
Eric Braaten, Li-Ping He, Jun Jiang
Summary: XEFT is a low-energy effective field theory for charm mesons and pions that systematically improves the description of the X(3872) resonance. A new formulation and renormalization scheme have been introduced to simplify calculations in XEFT, which involve a new dynamical field for a pair of charm mesons and a subtraction of amplitudes at the complex D*(0)-(D) over bar (0) threshold. These are illustrated by calculating the complex pole energy of X and the D*(0)-(D) over bar (0) scattering amplitude to next-to-leading order using Galilean-invariant XEFT.
Article
Nanoscience & Nanotechnology
Sang A. Lee, Jong Mok Ok, Jegon Lee, Jae-Yeol Hwang, Sangmoon Yoon, Se-Jeong Park, Sehwan Song, Jong-Seong Bae, Sungkyun Park, Ho Nyung Lee, Woo Seok Choi
Summary: This study successfully prepared 3C BaRuO3 thin films, which exhibit itinerant ferromagnetism with a transition temperature of around 48 K and a non-Fermi liquid phase.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Physics, Multidisciplinary
Pan Nie, Huakun Zuo, Lingxiao Zhao, Zengwei Zhu
Summary: This study investigates the fermiology, electrical anisotropy, and Fermi liquid properties of the layered ternary boride MoAlB. Multiple methods were used to reveal the electronic bands in this system and observe a large out-of-plane electrical anisotropy. Calculations show that the Fermi liquid behavior differs between the in-plane and out-of-plane directions, indicating the need for further exploration.
CHINESE PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Veronika C. Stangier, Erez Berg, Joerg Schmalian
Summary: By strain tuning Sr2RuO4, the temperature dependence of the electrical resistivity can be changed, consistent with experimental results. The thermal resistivity is governed by distinct processes involving compressive modes.
Article
Materials Science, Multidisciplinary
Gu Zhang, E. Novais, Harold U. Baranger
Summary: This study investigates the nonlinear conductance of a dissipative resonant level near its quantum critical point in a nonequilibrium steady state. The crossover from strong-coupling, non-Fermi-liquid regime to weak-coupling, Fermi-liquid ground state is driven by the instability of the quantum critical point. The nonequilibrium crossover driven by applied bias is found to be substantially sharper than the crossover driven by temperature.
Article
Astronomy & Astrophysics
Shingo Akama, Shinichi Hirano
Summary: In this paper, the authors investigate whether the models of Galilean Genesis without the strong coupling problem can explain the statistical properties of the observed cosmic microwave background fluctuations based on two unified frameworks of Galilean Genesis. They show that the models avoiding strong coupling and allowing a slightly red-tilted scalar power spectrum suffer from an overproduction of a scalar non-Gaussianity.
Article
Chemistry, Multidisciplinary
Ivan A. Troyan, Dmitrii V. Semenok, Anna G. Ivanova, Andrey V. Sadakov, Di Zhou, Alexander G. Kvashnin, Ivan A. Kruglov, Oleg A. Sobolevskiy, Marianna V. Lyubutina, Dmitry S. Perekalin, Toni Helm, Stanley W. Tozer, Maxim Bykov, Alexander F. Goncharov, Vladimir M. Pudalov, Igor S. Lyubutin
Summary: The chemical interaction of Sn with H-2 was studied using X-ray diffraction methods, revealing the superconducting properties and structure of SnH4 tetrahydride, as well as several lower hydrides. SnH4 showed unusual behavior in strong magnetic fields and its electrical resistance temperature dependence did not follow conventional theories. These findings suggest that superhydrides are more similar to cuprates than previously believed.
Article
Physics, Condensed Matter
Sonu Vishvakarma, V Srinivas
Summary: A comprehensive study was conducted on the magnetic, electrical and thermal properties of Ni100-x TM ( x ) (TM = V, Cr, Nb,) alloys around their critical concentration, revealing non-Fermi-liquid behavior and the influence of strongly correlated electron systems and spin fluctuations on the ferromagnetic ordering.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Physics, Multidisciplinary
Dominic Else, Ryan Thorngren, T. Senthil
Summary: A system with fractional filling ν imposes strong constraints on the low-energy theory, especially when the system is charge compressible. In such cases, the low-energy theory must have a very large emergent symmetry group. Ersatz Fermi liquids share common properties with Fermi liquids, including periodic quantum oscillations and response to an applied magnetic field.
Article
Physics, Multidisciplinary
Yawen Fang, Gael Grissonnanche, Anaelle Legros, Simon Verret, Francis Laliberte, Clement Collignon, Amirreza Ataei, Maxime Dion, Jianshi Zhou, David Graf, Michael J. Lawler, Paul A. Goddard, Louis Taillefer, B. J. Ramshaw
Summary: The nature of the pseudogap phase in cuprate high-temperature superconductors remains a major puzzle, especially regarding the topology of its Fermi surface. Angle-dependent magnetoresistance (ADMR) data suggests that within the pseudogap phase, the Fermi surface undergoes a transformation consistent with the presence of small nodal hole pockets. This indicates a change in the form of the Fermi surface when the pseudogap is present, potentially explaining the low carrier density in this regime.
