Zobrazeno 1 - 10
of 182
pro vyhledávání: '"Bogdanov, Nikolay"'
Autor:
Safari, Arta A., Bogdanov, Nikolay A.
A generalised extraction procedure for magnetic interactions using effective Hamiltonians applicable to systems with more than two sites featuring local spins $S_i \geq 1$ is presented. To this end, closed, non-recursive expressions pertaining to cha
Externí odkaz:
http://arxiv.org/abs/2410.11544
Autor:
Lavroff, Robert H., Kats, Daniel, Maschio, Lorenzo, Bogdanov, Nikolay, Alavi, Ali, Alexandrova, Anastassia N., Usvyat, Denis
To date, computational methods for modeling defects (vacancies, adsorbates, etc.) rely on periodic supercells in which the defect is far enough from its repeated image such that they can be assumed non-interacting. Defects in real solids, however, ca
Externí odkaz:
http://arxiv.org/abs/2406.03373
Autor:
Frontini, Felix I., Johnstone, Graham H. J., Iwahara, Naoya, Bhattacharyya, Pritam, Bogdanov, Nikolay A., Hozoi, Liviu, Upton, Mary H., Casa, Diego M., Hirai, Daigorou, Kim, Young-June
The $5d^1$ ordered double perovskites present an exotic playground for studying novel multi-polar physics due to large spin-orbit coupling. We present Re L3 edge resonant inelastic X-ray scattering (RIXS) results that reveal the presence of the dynam
Externí odkaz:
http://arxiv.org/abs/2311.01621
Publikováno v:
Commun. Phys. 7, 121 (2024)
Exchange underpins the magnetic properties of quantum matter. In its most basic form, it occurs through the interplay of Pauli's exclusion principle and Coulomb repulsion, being referred to as Coulomb exchange. Pauli's exclusion principle combined wi
Externí odkaz:
http://arxiv.org/abs/2306.17491
Publikováno v:
Phys. Rev. B 108, L161107 (2023)
Maximizing the ratio between Kitaev and residual Heisenberg interactions is a major goal in nowadays research on Kitaev-Heisenberg quantum magnets. Here we investigate Kitaev-Heisenberg exchange in a recently discovered crystalline phase of RuCl$_3$
Externí odkaz:
http://arxiv.org/abs/2302.00540
Autor:
Bhattacharyya, Pritam, Bogdanov, Nikolay A., Nishimoto, Satoshi, Wilson, Stephen D., Hozoi, Liviu
Publikováno v:
npj Quantum Materials 8, 52 (2023)
Kitaev exchange, a new paradigm in quantum magnetism research, occurs for 90$^{\circ}$ metal-ligand-metal links, $t_{2g}^5$ transition ions, and sizable spin-orbit coupling. It is being studied in honeycomb compounds but also on triangular lattices.
Externí odkaz:
http://arxiv.org/abs/2212.09365
The discovery of superconductivity in hole-doped infinite-layer NdNiO$_2$ -- a transition metal (TM) oxide that is both isostructural and isoelectronic to cuprate superconductors -- has lead to renewed enthusiasm in the hope of understanding the orig
Externí odkaz:
http://arxiv.org/abs/2201.05495
Autor:
Dobrautz, Werner, Katukuri, Vamshi M., Bogdanov, Nikolay A., Kats, Daniel, Manni, Giovanni Li, Alavi, Ali
A novel combined unitary and symmetric group approach is used to study the spin-$\frac{1}{2}$ Heisenberg model and related Fermionic systems in a spin-adapted representation, using a linearly-parameterised Ansatz for the many-body wave function. We s
Externí odkaz:
http://arxiv.org/abs/2112.09594
In this work we demonstrate how to compute the one- and two-body reduced density matrices within the spin-adapted full configuration interaction quantum Monte Carlo (FCIQMC) method, which is based on the graphical unitary group approach (GUGA). This
Externí odkaz:
http://arxiv.org/abs/2106.07775
Accurate ab initio calculations of 3d transition metal monoxide molecules have attracted extensive attention because of its relevance in physical and chemical science, as well as theoretical challenges in treating strong electron correlation. Meanwhi
Externí odkaz:
http://arxiv.org/abs/2101.09873