Zobrazeno 1 - 10
of 227
pro vyhledávání: '"Karsten Held"'
Autor:
Izabela Biało, Leonardo Martinelli, Gabriele De Luca, Paul Worm, Annabella Drewanowski, Simon Jöhr, Jaewon Choi, Mirian Garcia-Fernandez, Stefano Agrestini, Ke-Jin Zhou, Kurt Kummer, Nicholas B. Brookes, Luo Guo, Anthony Edgeton, Chang B. Eom, Jan M. Tomczak, Karsten Held, Marta Gibert, Qisi Wang, Johan Chang
Publikováno v:
Communications Physics, Vol 7, Iss 1, Pp 1-7 (2024)
Abstract Magnetic frustration is a route for novel ground states, including spin liquids and spin ices. Such frustration can be introduced through either lattice geometry or incompatible exchange interactions. Here, we find that epitaxial strain is a
Externí odkaz:
https://doaj.org/article/2b0850215af54e5e912c1065ae2d101f
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-6 (2024)
Abstract High-temperature unconventional superconductivity quite generically emerges from doping a strongly correlated parent compound, often (close to) an antiferromagnetic insulator. The recently developed dynamical vertex approximation is a state-
Externí odkaz:
https://doaj.org/article/989e93bafa0240f8be1f5f42cd07c40a
Publikováno v:
Physical Review Research, Vol 6, Iss 3, p 033227 (2024)
Experimental studies have found unusual transport properties in Ce_{3}Bi_{4}Pd_{3} which are potentially a consequence of the interplay between band-structure topology and electronic correlations. Based on these measurements, the existence of Weyl po
Externí odkaz:
https://doaj.org/article/75c9258200e84f85a6f2bcd7b062a0c1
Publikováno v:
Communications Physics, Vol 5, Iss 1, Pp 1-7 (2022)
The authors address a long-standing puzzle of pseudogap phenomenon observed in high temperature cuprates. Based on numerical calculations for the Hubbard model with analytic considerations, they find that a combination of strong-coupling antiferromag
Externí odkaz:
https://doaj.org/article/d6965677209144caadd488566e48b81d
Autor:
Judith Gabel, Matthias Pickem, Philipp Scheiderer, Lenart Dudy, Berengar Leikert, Marius Fuchs, Martin Stübinger, Matthias Schmitt, Julia Küspert, Giorgio Sangiovanni, Jan M. Tomczak, Karsten Held, Tien‐Lin Lee, Ralph Claessen, Michael Sing
Publikováno v:
Advanced Electronic Materials, Vol 8, Iss 4, Pp n/a-n/a (2022)
Abstract Thin films of transition metal oxides open up a gateway to nanoscale electronic devices beyond silicon characterized by novel electronic functionalities. While such films are commonly prepared in an oxygen atmosphere, they are typically cons
Externí odkaz:
https://doaj.org/article/d4808f2921684ca5b6a5b4a46ca40f2c
Autor:
Karsten Held, Liang Si, Paul Worm, Oleg Janson, Ryotaro Arita, Zhicheng Zhong, Jan M. Tomczak, Motoharu Kitatani
Publikováno v:
Frontiers in Physics, Vol 9 (2022)
We review the electronic structure of nickelate superconductors with and without effects of electronic correlations. As a minimal model, we identify the one-band Hubbard model for the Ni 3dx2−y2 orbital plus a pocket around the A-momentum. The latt
Externí odkaz:
https://doaj.org/article/b34c7f7866604fe5bd7dd65b8a220fd9
Autor:
Markus Wallerberger, Karsten Held
Publikováno v:
Physical Review Research, Vol 4, Iss 3, p 033238 (2022)
Ranking bit patterns—finding the index of a given pattern in an ordered sequence—is a major bottleneck in scaling up numerical quantum many-body calculations, as fermionic and hard-core bosonic states translate naturally to bit patterns. Traditio
Externí odkaz:
https://doaj.org/article/024a9ea74d314c9ebf825c49f0eed7a3
Publikováno v:
Physical Review Research, Vol 4, Iss 3, p 033253 (2022)
The two-dimensional nature of engineered transition-metal ultrathin oxide films offers a large playground of yet to be fully understood physics. Here, we study pristine SrVO_{3} monolayers that have recently been predicted to display a variety of mag
Externí odkaz:
https://doaj.org/article/7a2b478d834b4312ba288f2546787608
Publikováno v:
Crystals, Vol 12, Iss 5, p 656 (2022)
Superconductivity has entered the nickel age marked by enormous experimental and theoretical efforts. Notwithstanding, synthesizing nickelate superconductors remains extremely challenging, not least due to incomplete oxygen reduction and topotactic h
Externí odkaz:
https://doaj.org/article/f0bf64319edb4754b0cea01080b2f8a0
Publikováno v:
Physical Review Research, Vol 3, Iss 1, p 013149 (2021)
The parquet formalism and Hedin's GWγ approach are unified into a single theory of vertex corrections, corresponding to an exact reformulation of the parquet equations in terms of boson exchange. The method has no drawbacks compared to previous parq
Externí odkaz:
https://doaj.org/article/ff36b87fadce40c899bf9b8e1deb84df