Current jumps in flat-band ladders with Dzyaloshinskii-Moriya interactions

Autor: Santiago Daniel Acevedo, Pierre Pujol, Carlos Alberto Lamas

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2020, 102 (19), pp.195139. ⟨10.1103/PhysRevB.102.195139⟩

Localized magnons states, due to flat bands in the spectrum, is an intensely studied phenomenon and can be found in many frustrated magnets of different spatial dimensionality. The presence of Dzyaloshinskii-Moriya (DM) interactions may change radica

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::445c27ca0dacb94201515c06b3f5a35c
http://sedici.unlp.edu.ar/handle/10915/125303

Magnon crystals and magnetic phases in a kagome-stripe antiferromagnet

Autor: Marcelo José Fabián Arlego, Santiago Daniel Acevedo, Carlos Alberto Lamas, Pierre Pujol

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2019, 100 (19), pp.195145. ⟨10.1103/PhysRevB.100.195145⟩
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

In this work we analyze the magnetization properties of an antiferromagnetic Kagom\'e stripe lattice, motivated by the recent synthesis of materials exhibiting this structure. By employing a variety of techniques that include numerical methods as Den

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a23343372d59633d825367888abf6225
https://hal.archives-ouvertes.fr/hal-02470261

Magnetization process in a frustrated plaquette dimerized ladder

Autor: Carlos Alberto Lamas, Marcelo José Fabián Arlego, Federico Elías

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

The magnetic phase diagram of a plaquette dimerized antiferromagnetic system is studied by using a combination of numerical and analytical techniques. For the strongly frustrated regime, series expansions and bond operators techniques are employed to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fab6dec9ab0da9bbf314cba924a784be

Path integral approach to order by disorder selection in partially polarized quantum spin systems

Autor: Daniel Carlos Cabra, Gerardo Luis Rossini, Carlos Alberto Lamas, Pierre Pujol

Publikováno v: The European Physical Journal B: Condensed Matter and Complex Systems
The European Physical Journal B: Condensed Matter and Complex Systems, Springer-Verlag, 2015, 88, pp.176-. ⟨10.1140/epjb/e2015-60211-6⟩

In this paper we study the frustrated J1−J2quantum Heisenberg model on the square lattice for J2>J1/2, in a magnetic field. In this regime the classical system is known tohave a degenerate manifold of lowest energy configurations, where standard th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61bf82ec43033896b3d9c190dbb7311a
https://link.springer.com/article/10.1140/epjb/e2015-60211-6

Quantum phases in the frustrated Heisenberg model on the bilayer honeycomb lattice

Autor: Carlos Alberto Lamas, Hao Zhang, Marcelo José Fabián Arlego

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

We use a combination of analytical and numerical techniques to study the phase diagram of the frustrated Heisenberg model on the bilayer honeycomb lattice. Using the Schwinger boson description of the spin operators followed by a mean field decouplin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::592387d2ec4a052c7802a92dd014d315
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.89.024403