Zobrazeno 1 - 10
of 724
pro vyhledávání: '"Chubukov, A. V."'
Autor:
Chubukov, A. V., Varma, C. M.
We analyze a model for electronic structure and interactions in twisted transition metal chalcogenide WSe$_2$ for superconductivity. In this material, spin-orbit scattering locks the z-components of spins of low-energy fermions near the Dirac ${\bf K
Externí odkaz:
http://arxiv.org/abs/2410.10038
We have previously shown that the Stoner instability 2D has unconventional behavior: it is strongly first order but features a susceptibility which diverges at the transition point. Here, we analyze the Stoner transition for two-dimensional systems w
Externí odkaz:
http://arxiv.org/abs/2409.18934
We show that an interacting electronic system with a single ordinary or extended Van Hove point, which crosses the Fermi energy, is unstable against triplet superconductivity. The pairing mechanism is unconventional. There is no Cooper instability. I
Externí odkaz:
http://arxiv.org/abs/2408.05572
Autor:
Gindikin, Yasha, Li, Songci, Levchenko, Alex, Kamenev, Alex, Chubukov, Andrey V., Maslov, Dmitrii L.
Publikováno v:
Phys. Rev. B 110, 085139 (2024)
We demonstrate that the optical conductivity of a Fermi liquid (FL) in the absence of umklapp scattering is dramatically affected by the topology of the Fermi surface (FS). Specifically, electron-electron (ee) scattering leads to rapid current relaxa
Externí odkaz:
http://arxiv.org/abs/2406.10503
We analyze the transition into the most favorable ordered state for a system of 2D fermions with spin and valley degrees of freedom. We show that for a range of rotationally invariant dispersions, the ordering transition is highly unconventional: the
Externí odkaz:
http://arxiv.org/abs/2406.04416
We show that two-dimensional fermions with dispersion $k^2$ or $k^4$ undergo a first-order Stoner transition to a fully spin-polarized state despite that the spin susceptibility diverges at the critical point. We extend our analysis to systems with d
Externí odkaz:
http://arxiv.org/abs/2406.04415
We present a comparative analysis of the validity of Eliashberg theory for the cases of fermions interacting with an Einstein phonon and with soft nematic fluctuations near an Ising-nematic/Ising-ferromagnetic quantum-critical point (QCP). In both ca
Externí odkaz:
http://arxiv.org/abs/2404.11820
We analyze the quasiparticle interaction function (the fully dressed and antisymmetrized interaction between fermions) for a two-dimensional Fermi liquid at zero temperature close to a q=0 charge quantum critical point (QCP) in the $s-$wave channel.
Externí odkaz:
http://arxiv.org/abs/2403.09835
Autor:
Gindikin, Yasha, Chubukov, Andrey V.
Publikováno v:
Phys. Rev. B 109, 115156 (2024)
We analyze optical conductivity of a clean two-dimensional electron system in a Fermi liquid regime near a $T=0$ Ising-nematic quantum critical point (QCP), and extrapolate the results to a QCP. We employ direct perturbation theory up to the two-loop
Externí odkaz:
http://arxiv.org/abs/2401.17392
Publikováno v:
Phys. Rev. B 109, 155118 (2024)
We investigate the crossover from an ordinary van Hove singularity (OVHS) to a higher order van Hove singularity (HOVHS) in a model applicable to Bernal bilayer graphene and rhombohedral trilayer graphene in a displacement field. At small doping, the
Externí odkaz:
http://arxiv.org/abs/2401.12384