Počet záznamů: 1
Nodal ground states and orbital textures in semiconductor quantum dots
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SYSNO ASEP 0427167 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Nodal ground states and orbital textures in semiconductor quantum dots Tvůrce(i) Lee, J. (US)
Výborný, Karel (FZU-D) RID, ORCID
Han, J.E. (US)
Žutič, I. (US)Zdroj.dok. Physical Review. B - ISSN 1098-0121
Roč. 89, č. 4 (2014), "045315-1"-"045315-17"Poč.str. 17 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova quantum dots ; electronic structure Vědní obor RIV BM - Fyzika pevných látek a magnetismus Institucionální podpora FZU-D - RVO:68378271 UT WOS 000332337400005 EID SCOPUS 84897628956 DOI 10.1103/PhysRevB.89.045315 Anotace Conventional understanding implies that the ground state of a nonmagnetic quantum mechanical system should be nodeless. There are, however, reports that nodal ground states for holes are possible. The existence of such nodal states has been debated and even viewed merely as an artifact of a k·p model. Using complementary approaches of both k·p and tight-binding models, further supported by an effective Hamiltonian for a continuum model, we reveal that nodal ground states in quantum dots are not limited to a specific approach. Remarkably, the emergence of nodal hole states at the top of the valence band can be attributed to the formation of orbital vortex textures through competition between the hole kinetic energy and the coupling to the conduction band states. We suggest an experimental test for our predictions of the reversed energy ordering and the existence of nodal ground states. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2015
Počet záznamů: 1