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Showing 1 to 12 of 199 entries
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Correlation between topological band character and chemical bonding in a Bi14Rh3I9-based family of insulators.

Scientific reports

Rasche B, Isaeva A, Ruck M, Koepernik K, Richter M, van den Brink J.
PMID: 26875525
Sci Rep. 2016 Feb 15;6:20645. doi: 10.1038/srep20645.

Recently the presence of topologically protected edge-states in Bi14Rh3I9 was confirmed by scanning tunnelling microscopy consolidating this compound as a weak 3D topological insulator (TI). Here, we present a density-functional-theory-based study on a family of TIs derived from the...

Topological Edge States with Zero Hall Conductivity in a Dimerized Hofstadter Model.

Physical review letters

Lau A, Ortix C, van den Brink J.
PMID: 26636866
Phys Rev Lett. 2015 Nov 20;115(21):216805. doi: 10.1103/PhysRevLett.115.216805. Epub 2015 Nov 20.

The Hofstadter model is a simple yet powerful Hamiltonian to study quantum Hall physics in a lattice system, manifesting its essential topological states. Lattice dimerization in the Hofstadter model opens an energy gap at half filling. Here we show...

Strongly Anisotropic Ballistic Magnetoresistance in Compact Three-Dimensional Semiconducting Nanoarchitectures.

Physical review letters

Chang CH, van den Brink J, Ortix C.
PMID: 25494087
Phys Rev Lett. 2014 Nov 28;113(22):227205. doi: 10.1103/PhysRevLett.113.227205. Epub 2014 Nov 26.

We establish theoretically that in nonmagnetic semiconducting bilayer or multilayer thin film systems rolled up into compact quasi-one-dimensional nanoarchitectures, the ballistic magnetoresistance is very anisotropic: conductances depend strongly on the direction of an externally applied magnetic field. This phenomenon...

Resonant Inelastic X-Ray Scattering Response of the Kitaev Honeycomb Model.

Physical review letters

Halász GB, Perkins NB, van den Brink J.
PMID: 27689295
Phys Rev Lett. 2016 Sep 16;117(12):127203. doi: 10.1103/PhysRevLett.117.127203. Epub 2016 Sep 16.

We calculate the resonant inelastic x-ray scattering (RIXS) response of the Kitaev honeycomb model, an exactly solvable quantum-spin-liquid model with fractionalized Majorana and flux excitations. We find that the fundamental RIXS channels, the spin-conserving (SC) and the non-spin-conserving (NSC)...

Magnon spectrum of the helimagnetic insulator Cu2OSeO3.

Nature communications

Portnichenko PY, Romhányi J, Onykiienko YA, Henschel A, Schmidt M, Cameron AS, Surmach MA, Lim JA, Park JT, Schneidewind A, Abernathy DL, Rosner H, van den Brink J, Inosov DS.
PMID: 26911567
Nat Commun. 2016 Feb 25;7:10725. doi: 10.1038/ncomms10725.

Complex low-temperature-ordered states in chiral magnets are typically governed by a competition between multiple magnetic interactions. The chiral-lattice multiferroic Cu2OSeO3 became the first insulating helimagnetic material in which a long-range order of topologically stable spin vortices known as skyrmions...

Effectiveness and safety of antihistamines up to fourfold or higher in treatment of chronic spontaneous urticaria.

Clinical and translational allergy

van den Elzen MT, van Os-Medendorp H, van den Brink I, van den Hurk K, Kouznetsova OI, Lokin ASHJ, Laheij-de Boer AM, Röckmann H, Bruijnzeel-Koomen CAFM, Knulst AC.
PMID: 28289538
Clin Transl Allergy. 2017 Feb 14;7:4. doi: 10.1186/s13601-017-0141-3. eCollection 2017.

BACKGROUND: Treatment with second-generation antihistamines is recommended in patients with chronic spontaneous urticaria (CSU). Some patients remain unresponsive even after up-dosing up to fourfold. Many third line treatment options have limited availability and/or give rise to significant side effects....

Microscopic origin of large negative magnetoelectric coupling in Sr(1/2)Ba(1/2)MnO3.

Physical review letters

Giovannetti G, Kumar S, Ortix C, Capone M, van den Brink J.
PMID: 23005326
Phys Rev Lett. 2012 Sep 07;109(10):107601. doi: 10.1103/PhysRevLett.109.107601. Epub 2012 Sep 07.

With a combined ab initio density functional and model Hamiltonian approach we establish that in the recently discovered multiferroic phase of the manganite Sr(1/2)Ba(1/2)MnO3 the polar distortion of Mn and O ions is stabilized via enhanced in-plane Mn-O hybridizations....

Magnetic moment formation due to arsenic vacancies in LaFeAsO-derived superconductors.

Scientific reports

Kikoin K, Drechsler SL, Koepernik K, Málek J, van den Brink J.
PMID: 26169486
Sci Rep. 2015 Jul 14;5:11280. doi: 10.1038/srep11280.

Arsenic vacancies in LaFeAsO-derived superconductors are nominally non-magnetic defects. However, we find from a microscopic theory in terms of an appropriately modified Anderson-Wolff model that in their vicinity local magnetic moments form. They can arise because removing an arsenic...

Analytical study of the chemical and physical changes induced by KrF laser cleaning of tempera paints.

Analytical chemistry

Castillejo M, Martin M, Oujia M, Silva D, Torres R, Manousaki A, Zafiropulos V, van den Brink OF, Heeren RM, Teule R, Silva A, Gouveia H.
PMID: 12349968
Anal Chem. 2002 Sep 15;74(18):4662-71. doi: 10.1021/ac025778c.

The cleaning of paintings using UV lasers is a growing field of interest in the practice of conservation. In this work, we have studied the chemical and physical changes induced by KrF excimer laser at 248 nm of tempera...

Magnetically induced electronic ferroelectricity in half-doped manganites.

Physical review letters

Giovannetti G, Kumar S, van den Brink J, Picozzi S.
PMID: 19659318
Phys Rev Lett. 2009 Jul 17;103(3):037601. doi: 10.1103/PhysRevLett.103.037601. Epub 2009 Jul 17.

Using a joint approach of density functional theory and model calculations, we demonstrate that a prototypical charge ordered half-doped manganite La1/2Ca1/2MnO3 is multiferroic. The combination of a peculiar charge-orbital ordering and a tendency to form spin dimers breaks the...

Graphene: What lies between.

Nature materials

van den Brink J.
PMID: 20332786
Nat Mater. 2010 Apr;9(4):291-2. doi: 10.1038/nmat2733.

No abstract available.

Transition metal oxides: travels in one dimension.

Nature materials

van den Brink J.
PMID: 16738674
Nat Mater. 2006 Jun;5(6):427-8. doi: 10.1038/nmat1648.

No abstract available.

Showing 1 to 12 of 199 entries