Zobrazeno 1 - 10
of 344
pro vyhledávání: '"Steven A. Kivelson"'
Publikováno v:
Physical Review X, Vol 14, Iss 4, p 041004 (2024)
We introduce the concept of “quantum geometric nesting” (QGN) to characterize the idealized ordering tendencies of certain flat-band systems implicit in the geometric structure of the flat-band subspace. Perfect QGN implies the existence of an in
Externí odkaz:
https://doaj.org/article/5294769b548d46dda1788b3f3a682e13
Autor:
Benjamin A. Foutty, Vladimir Calvera, Zhaoyu Han, Carlos R. Kometter, Song Liu, Kenji Watanabe, Takashi Taniguchi, James C. Hone, Steven A. Kivelson, Benjamin E. Feldman
Publikováno v:
Physical Review X, Vol 14, Iss 3, p 031018 (2024)
First-order phase transitions produce abrupt changes to the character of both ground and excited electronic states. Here we conduct electronic compressibility measurements to map the spin phase diagram and Landau level (LL) energies of monolayer WSe_
Externí odkaz:
https://doaj.org/article/03a4f255f4e843b9bea9f6ac7325f0e1
Publikováno v:
npj Quantum Materials, Vol 8, Iss 1, Pp 1-7 (2023)
Abstract We examine key aspects of the theory of the Bardeen–Cooper–Schrieffer (BCS) to Bose–Einstein condensation (BEC) crossover, focusing on the temperature dependence of the chemical potential, μ. We identify an accurate method of determin
Externí odkaz:
https://doaj.org/article/664187e4e6d44e2a9a7176a2f8cd5b81
Autor:
Daniel Jost, Leander Peis, Ge He, Andreas Baum, Stephan Geprägs, Johanna C. Palmstrom, Matthias S. Ikeda, Ian R. Fisher, Thomas Wolf, Samuel Lederer, Steven A. Kivelson, Rudi Hackl
Publikováno v:
Communications Physics, Vol 5, Iss 1, Pp 1-5 (2022)
Quantum phase transitions, occurring at zero temperature for a given system, can be induced by the application of physical or chemical pressure, and can help elucidate the underlying mechanisms of unconventional superconductivity. Here, using Raman s
Externí odkaz:
https://doaj.org/article/65a7c6db22ee41c6b642ef15c5479266
Publikováno v:
npj Quantum Materials, Vol 7, Iss 1, Pp 1-6 (2022)
Abstract What limits the value of the superconducting transition temperature (T c) is a question of great fundamental and practical importance. Various heuristic upper bounds on T c have been proposed, expressed as fractions of the Fermi temperature,
Externí odkaz:
https://doaj.org/article/9b1a39e7de1d465c84563e0e6f1a4908
Publikováno v:
npj Quantum Materials, Vol 7, Iss 1, Pp 1-6 (2022)
Abstract A pair-density-wave (PDW) is a superconducting state with an oscillating order parameter. A microscopic mechanism that can give rise to it has been long sought but has not yet been established by any controlled calculation. Here we report a
Externí odkaz:
https://doaj.org/article/9710e46fbb4d4c7793d89b16edea792f
Publikováno v:
npj Quantum Materials, Vol 6, Iss 1, Pp 1-7 (2021)
Abstract We present a theoretical framework for understanding the behavior of the normal and superconducting states of overdoped cuprate high temperature superconductors in the vicinity of the doping-tuned quantum superconductor-to-metal transition.
Externí odkaz:
https://doaj.org/article/12951bde3e08488ab91a43f72a76c963
Autor:
Kyung-Su Kim, Steven A. Kivelson
Publikováno v:
npj Quantum Materials, Vol 6, Iss 1, Pp 1-3 (2021)
Abstract It is widely held that disorder is essential to the existence of a finite interval of magnetic field in which the Hall conductance is quantized, i.e., for the existence of “plateaus” in the quantum Hall effect. Here, we show that the exi
Externí odkaz:
https://doaj.org/article/f2226305a99a4a1b9e7f737a77bf1aff
Publikováno v:
npj Quantum Materials, Vol 2, Iss 1, Pp 1-7 (2017)
Electron dynamics: A new model for resistivity saturation Resistivity saturates as a function of temperature in some metals; this happens in a regime in which the usual description of a metal in terms of ballistically propagating quasiparticles does
Externí odkaz:
https://doaj.org/article/5f66f0f1f2c546e1b67b7aa316441a03
Autor:
Alan Fang, Anisha G. Singh, Joshua A. W. Straquadine, Ian R. Fisher, Steven A. Kivelson, Aharon Kapitulnik
Publikováno v:
Physical Review Research, Vol 2, Iss 4, p 043221 (2020)
Pd-intercalated ErTe_{3} is studied as a model system to explore the effect of “intertwined” superconducting and charge density wave (CDW) orders. Despite the common wisdom that superconductivity emerges only when CDW is suppressed, we present da
Externí odkaz:
https://doaj.org/article/65c70b61e8cc4fc6b816dcbcfc645c67