Výsledky vyhledávání - "Gonçalo Catarina"

Autor: Joaquín Fernández-Rossier, Gonçalo Catarina

Publikováno v: RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)

The Haldane phase for antiferromagnetic spin-1 chains is a celebrated topological state of matter, featuring gapped excitations and fractional spin-1/2 edge states. Here, we provide numerical evidence that this phase can be realized with a Hubbard mo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b2087f26f5f36f01fb4f207abcee1bd
http://hdl.handle.net/10045/122009

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Publisher Correction: Observation of fractional edge excitations in nanographene spin chains

Autor: Ji Ma, Roman Fasel, David Jacob, Fu-Peng Wu, Shantanu Mishra, Gonçalo Catarina, Carlo A. Pignedoli, Kristjan Eimre, Pascal Ruffieux, Joaquín Fernández-Rossier, Ricardo Ortiz, Xinliang Feng

Publikováno v: Nature

Correction to: Nature https://doi.org/10.1038/s41586-021-03842-3 Published online 13 October 2021.In the version of this Article initially published, there was an error in Equation (1). Further, a placeholder reference was used for ref. 42.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::788cd38f39d5228007197d4e99b44801
https://hdl.handle.net/21.11116/0000-0009-A28C-2

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Observation of fractional edge excitations in nanographene spin chains

Autor: Ricardo Ortiz, Joaquín Fernández-Rossier, Carlo A. Pignedoli, Kristjan Eimre, Xinliang Feng, Pascal Ruffieux, Shantanu Mishra, Gonçalo Catarina, Roman Fasel, Fu-Peng Wu, David Jacob, Ji Ma

Publikováno v: Nature
RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)

Fractionalization is a phenomenon in which strong interactions in a quantum system drive the emergence of excitations with quantum numbers that are absent in the building blocks. Outstanding examples are excitations with charge e/3 in the fractional

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83c5521ba52e5f589cbe437076cccb14
https://hdl.handle.net/10045/118696

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Optimizing quantum phase estimation for the simulation of Hamiltonian eigenstates

Autor: Ronan Gautier, Joaquín Fernández-Rossier, Pedro M. Q. Cruz, Gonçalo Catarina

Publikováno v: RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)

We revisit quantum phase estimation algorithms for the purpose of obtaining the energy levels of many-body Hamiltonians and pay particular attention to the statistical analysis of their outputs. We introduce the mean phase direction of the parent dis

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::888a566a088211de3ff8794355573c46
https://hdl.handle.net/10045/108714

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Berry phase estimation in gate-based adiabatic quantum simulation

Autor: Bruno Murta, Joaquín Fernández-Rossier, Gonçalo Catarina

Publikováno v: RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)

Gate-based quantum computers can in principle simulate the adiabatic dynamics of a large class of Hamiltonians. Here we consider the cyclic adiabatic evolution of a parameter in the Hamiltonian. We propose a quantum algorithm to estimate the Berry ph

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f329eef42cf5688d3074fae1c18e9c01
https://doi.org/10.1103/physreva.101.020302

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Magneto-optical response of chromium trihalide monolayers: Chemical trends

Autor: Gonçalo Catarina, Alejandro Molina-Sanchez, Davide Sangalli, Joaquín Fernández-Rossier

Publikováno v: JOURNAL OF MATERIALS CHEMISTRY C 8 (2020): 8856–8863. doi:10.1039/d0tc01322f
info:cnr-pdr/source/autori:Molina-Sánchez, Alejandro; Catarina, Gonçalo; Sangalli, Davide; Fernández-Rossier, Joaquín/titolo:Magneto-optical response of chromium trihalide monolayers: Chemical trends/doi:10.1039%2Fd0tc01322f/rivista:JOURNAL OF MATERIALS CHEMISTRY C/anno:2020/pagina_da:8856/pagina_a:8863/intervallo_pagine:8856–8863/volume:8
Journal of Materials Chemistry C
RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)

Chromium trihalides (CrI3, CrBr3 and CrCl3) form a prominent family of isostructural insulating layered materials in which ferromagnetic order has been observed down to the monolayer. Here we provide a comprehensive computational study of magneto-opt

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::995c96fa131e349a46fbe45e2f93efbb
https://publications.cnr.it/doc/426607

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Magneto-optical Kerr effect in spin split two-dimensional massive Dirac materials

Autor: Gonçalo Catarina, Nuno M. R. Peres, Joaquín Fernández-Rossier

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)
2D Materials

Two-dimensional (2D) massive Dirac electrons possess a finite Berry curvature, with Chern number $\pm 1/2$, that entails both a quantized dc Hall response and a subgap full-quarter Kerr rotation. The observation of these effects in 2D massive Dirac m

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Monolayer transition metal dichalcogenides in strong magnetic fields:Validating the Wannier model using a microscopic calculation

Autor: Gonçalo Catarina, Nuno M. R. Peres, Thomas Garm Pedersen, Jonas Have

Publikováno v: Have, J, Catarina, G, Pedersen, T G & Peres, N M R 2019, ' Monolayer transition metal dichalcogenides in strong magnetic fields : Validating the Wannier model using a microscopic calculation ', Physical Review B, vol. 99, no. 3, 035416 . https://doi.org/10.1103/PhysRevB.99.035416
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Physical Review B

Using an equation of motion (EOM) approach, we calculate excitonic properties of monolayer transition metal dichalcogenides (TMDs) perturbed by an external magnetic field. We compare our findings to the widely used Wannier model for excitons in two-d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4038afbe98d8fa463ecad777c97f2f6
https://vbn.aau.dk/da/publications/3214f1d0-9bd1-45c8-97c0-ecfc7bc634d7

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Twisted bilayer graphene: low-energy physics, electronic and optical properties

Autor: Gonçalo Catarina, Bruno Amorim, Eduardo V. Castro, João M. V. P. Lopes, Nuno Peres

Publikováno v: Handbook of Graphene Set
CIÊNCIAVITAE

Van der Waals (vdW) heterostructures ---formed by stacking or growing two-dimensional (2D) crystals on top of each other--- have emerged as a new promising route to tailor and engineer the properties of 2D materials. Twisted bilayer graphene (tBLG),

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Optical orientation with linearly polarized light in transition metal dichalcogenides

Autor: Gonçalo Catarina, Joaquín Fernández-Rossier, Jonas Have, Nuno M. R. Peres

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Physical Review B
RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)

We study the optical properties of semiconducting transition metal dichalcogenide monolayers under the influence of strong out-of-plane magnetic fields, using the effective massive Dirac model. We pay attention to the role of spin-orbit-coupling effe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b3f940de98d9742326f2a4d7da2d52d

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