Zobrazeno 1 - 10
of 1 763
pro vyhledávání: '"Chubukov P"'
Autor:
Islam, Kazi Ranjibul, Chubukov, Andrey
We analyze superconductivity in a multi-orbital fermionic system near the onset of a nematic order, using doped FeSe as an example. We associate nematicity with a spontaneous polarization between $d_{\text{xz}}$ and $d_{\text{yz}}$ orbitals (a Pomera
Externí odkaz:
http://arxiv.org/abs/2412.07008
We analyze the dynamical pairing susceptibility $\chi_{pp} (\omega_m)$ at $T=0$ in a quantum-critical metal, where superconductivity emerges out of a non-Fermi liquid ground state once the pairing interaction exceeds a certain threshold. We obtain $\
Externí odkaz:
http://arxiv.org/abs/2412.03698
Autor:
Boebinger, Gregory S., Chubukov, Andrey V., Fisher, Ian R., Grosche, F. Malte, Hirschfeld, Peter J., Julian, Stephen R., Keimer, Bernhard, Kivelson, Steven A., Mackenzie, Andrew P., Maeno, Yoshiteru, Orenstein, Joseph, Ramshaw, Brad J., Sachdev, Subir, Schmalian, Jörg, Vojta, Matthias
Publikováno v:
Nat. Rev. Phys. (2024)
The field of hydride superconductivity has recently been mired in a controversy that might divert attention from the question of central importance: do hydrides support genuine superconductivity or not? We examine some key papers from the field, and
Externí odkaz:
http://arxiv.org/abs/2411.10522
Autor:
Chubukov, A. V., Varma, C. M.
We analyze a model for electronic structure and interactions in twisted transition metal chalcogenide WSe$_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