Zobrazeno 1 - 10
of 133
pro vyhledávání: '"Uwe Gerstmann"'
Publikováno v:
Crystals, Vol 14, Iss 1, p 5 (2023)
Batteries based on heavier alkali ions are considered promising candidates to substitute for current Li-based technologies. In this theoretical study, we characterize the structural properties of a novel material, i.e., F-doped RbTiOPO4 (RbTiPO4F, RT
Externí odkaz:
https://doaj.org/article/822a644c3467464ba9ba43fd9439f1a2
Autor:
Sergej Neufeld, Uwe Gerstmann, Laura Padberg, Christof Eigner, Gerhard Berth, Christine Silberhorn, Lukas M. Eng, Wolf Gero Schmidt, Michael Ruesing
Publikováno v:
Crystals, Vol 13, Iss 10, p 1423 (2023)
The crystal family of potassium titanyl phosphate (KTiOPO4) is a promising material group for applications in quantum and nonlinear optics. The fabrication of low-loss optical waveguides, as well as high-grade periodically poled ferroelectric domain
Externí odkaz:
https://doaj.org/article/c36298a10c2a436c9f120465279b50b1
Publikováno v:
ACS Omega, Vol 5, Iss 37, Pp 24057-24063 (2020)
Externí odkaz:
https://doaj.org/article/c0226fac917d46af9ef76bcb0b88b17f
Publikováno v:
Crystals, Vol 12, Iss 11, p 1586 (2022)
Hole polarons and defect-bound exciton polarons in lithium niobate are investigated by means of density-functional theory, where the localization of the holes is achieved by applying the +U approach to the oxygen 2p orbitals. We find three principal
Externí odkaz:
https://doaj.org/article/a23260bed9de40c69e06eb9124a52832
Autor:
Laura Padberg, Viktor Quiring, Adriana Bocchini, Matteo Santandrea, Uwe Gerstmann, Wolf Gero Schmidt, Christine Silberhorn, Christof Eigner
Publikováno v:
Crystals, Vol 12, Iss 10, p 1359 (2022)
We study the DC conductivity in potassium titanyl phosphate (KTiOPO4, KTP) and its isomorphs KTiOAsO4 (KTA) and Rb1%K99%TiOPO4 (RKTP) and introduce a method by which to reduce the overall ionic conductivity in KTP by a potassium nitrate treatment. Fu
Externí odkaz:
https://doaj.org/article/6823b46dcfb440a5be2a8dcc8fb03913
Autor:
Hans Jürgen von Bardeleben, Shengqiang Zhou, Uwe Gerstmann, Dmitry Skachkov, Walter R. L. Lambrecht, Quoc Duy Ho, Peter Deák
Publikováno v:
APL Materials, Vol 7, Iss 2, Pp 022521-022521-8 (2019)
Proton irradiation of both n-type and semi-insulating bulk samples of β-Ga2O3 leads to the formation of two paramagnetic defects with spin S = 1/2 and monoclinic point symmetry. Their high introduction rates indicate them to be primary irradiation i
Externí odkaz:
https://doaj.org/article/6cd53fa153374970b1268b2454698dd6
Electron Polarons in Lithium Niobate: Charge Localization, Lattice Deformation, and Optical Response
Publikováno v:
Crystals, Vol 11, Iss 5, p 542 (2021)
Lithium niobate (LiNbO3), a material frequently used in optical applications, hosts different kinds of polarons that significantly affect many of its physical properties. In this study, a variety of electron polarons, namely free, bound, and bipolaro
Externí odkaz:
https://doaj.org/article/edad27f4b2b04d50ae98e71cd4f98b8d
Autor:
Falko Schmidt, Agnieszka L. Kozub, Timur Biktagirov, Christof Eigner, Christine Silberhorn, Arno Schindlmayr, Wolf Gero Schmidt, Uwe Gerstmann
Publikováno v:
Physical Review Research, Vol 2, Iss 4, p 043002 (2020)
Polarons in dielectric crystals play a crucial role for applications in integrated electronics and optoelectronics. In this work, we use density-functional theory and Green's function methods to explore the microscopic structure and spectroscopic sig
Externí odkaz:
https://doaj.org/article/e8817c1fe3344c54a0bb8795bc215469
Spin-orbit driven electrical manipulation of the zero-field splitting in high-spin centers in solids
Autor:
Timur Biktagirov, Uwe Gerstmann
Publikováno v:
Physical Review Research, Vol 2, Iss 2, p 023071 (2020)
In recent years, spin-orbit coupling has attracted significant attention due to its promising applications in spintronic devices. In solid-state spin qubits, the spin-orbit coupling allows for the lifting of spin degeneracy in the absence of an exter
Externí odkaz:
https://doaj.org/article/2261ff81c65e4800a8399da6a7867b91
Publikováno v:
Physical Review Research, Vol 2, Iss 2, p 022024 (2020)
An accurate description of the two-electron density, crucial for magnetic coupling in spin systems, provides in general a major challenge for density functional theory calculations. It affects, e.g., the calculated zero-field splitting (ZFS) energies
Externí odkaz:
https://doaj.org/article/2479b7d348cd425bb991068db4e98d24