Zobrazeno 1 - 10
of 128
pro vyhledávání: '"Bristowe, Nicholas"'
The design of novel multiferroic ABO$_3$ perovskites is complicated by the presence of necessary magnetic cations and ubiquitous antiferrodistortive modes, both of which suppress polar distortions. Using first-principles simulations, we observe that
Externí odkaz:
http://arxiv.org/abs/2406.05001
The promise of a strong magnetoelectric (ME) coupling in a multiferroic (MF) material is not only of fundamental interest, but also forms the basis of next generation memory devices where the direction of magnetization can be reversed by an external
Externí odkaz:
http://arxiv.org/abs/2405.01307
In spite of the interest in the two-dimensional electron gases (2DEGs) experimentally found at surfaces and interfaces, important uncertainties remain about the observed insulator--metal transitions (IMTs). Here we show how an explicit improper coupl
Externí odkaz:
http://arxiv.org/abs/2401.03016
Publikováno v:
Journal of Physics: Condensed Matter (2023)
Type-II multiferroics, in which the magnetic order breaks inversion symmetry, are appealing for both fundamental and applied research due their intrinsic coupling between magnetic and electrical orders. Using first-principles calculations we study th
Externí odkaz:
http://arxiv.org/abs/2311.10555
Suppression of superconductivity in favour of a striped phase, and its coincidence with a structural transition from a low-temperature orthorhombic (LTO) to a low-temperature tetragonal (LTT) phase, is a ubiquitous feature of hole-doped lanthanum cup
Externí odkaz:
http://arxiv.org/abs/2302.09588
The phenomenological theory for the polar instability giving rise to a two-dimensional electron gas at perovskite interfaces is hereby extended to include the coupling to perovskite tilts. A Landau theory for homogeneous tilts is first explored, sett
Externí odkaz:
http://arxiv.org/abs/2206.13555
Autor:
Clarke, Gabriel, Daisenberger, Dominik, Luo, X., Cheong, S. W., Bristowe, Nicholas C., Senn, Mark S.
The temperature-dependent phase transitions in Ruddlesden-Popper oxides with perovskite bilayers have been under increased scrutiny in recent years due to the so-called hybrid improper ferroelectricity that some chemical compositions exhibit. However
Externí odkaz:
http://arxiv.org/abs/2112.03819
Autor:
Tidey, Jeremiah P., Keegan, Christopher, Bristowe, Nicholas C., Mostofi, Arash A., Hong, Zih-Mei, Chen, Bo-Hao, Chuang, Yu-Chun, Chen, Wei-Tin, Senn, Mark S.
We undertake a detailed high-resolution diffraction study of a novel plain band insulator, La$_2$MgO$_4$, which may be viewed as a structural surrogate system of the undoped end-member of the high-T$_c$ superconductors, La$_{2-x-y}$A$^{2+}_x$RE$^{3+}
Externí odkaz:
http://arxiv.org/abs/2111.11888
Autor:
Bird, Tobias A., Chen, Jungshen, Songvilay, Manila, Stock, Chris, Wharmby, Michael T., Bristowe, Nicholas C., Senn, Mark S.
Hybrid perovskites are a rapidly growing research area, having reached photovoltaic power conversion efficiencies of over 25 \%. We apply a symmetry-motivated analysis method to analyse X-ray pair distribution function data of the cubic phases of the
Externí odkaz:
http://arxiv.org/abs/2108.05751
Autor:
Bird, Tobias A., Wilkinson, Mark G. L., Keen, David A., Smith, Ronald I., Bristowe, Nicholas C., Dove, Martin T., Phillips, Anthony E., Senn, Mark S.
We use a symmetry-motivated approach to analyse neutron pair distribution function data to investigate the mechanism of negative thermal expansion (NTE) in ReO$_3$. This analysis shows that the local structure of ReO$_3$ is dominated by an in-phase o
Externí odkaz:
http://arxiv.org/abs/2108.03006