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“Free-standing Si and Ge, and Ge/Si core-shell semiconductor nanowires”. Peelaers H, Partoens B, Peeters FM, Acta physica Polonica: A: general physics, solid state physics, applied physics
T2 –, WELCOME Scientific Meeting on Hybrid Nanostructures, AUG 28-31, 2011, Torun, POLAND 122, 294 (2012)
Abstract: The properties of free-standing silicon and germanium nanowires oriented along the [110] direction are studied using different first principles methods. We show the corrections due to quasi-particles to the band structures obtained using the local-density approximation. The formation energies of B and P doped nanowires are calculated, both in the absence and presence of dangling bond defects and we link these to experimental results. Furthermore, we report on the phonon properties of pure Si and Ge nanowires, as well as Ge/Si core-shell nanowires, and discuss the differences between them.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Impact Factor: 0.469
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“Interband optical properties of concentric type-I nanorings in a normal magnetic field”. Arsoski V, Tadić, M, Peeters FM, Acta physica Polonica: A: general physics, solid state physics, applied physics 117, 733 (2010)
Abstract: Two concentric two-dimensional GaAs/(Al,Ga)As nanorings in a normal magnetic field are theoretically studied. The single-band effective mass approximation is adopted for both the electron and the hole states, and the analytical solutions are given. We find that the electronic single particle states are arranged in pairs, which exhibit anticrossings and the orbital momentum transitions in the energy spectrum when magnetic field increases. Their period is essentially determined by the radius of the outer ring. The oscillator strength for interband transitions is strongly reduced close to each anticrossing. We show that an optical excitonic Aharonov-Bohm effect may occur in concentric nanorings.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Impact Factor: 0.469
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“The optical excitonic Aharonov-Bohm effect in a few nanometer wide type-I nanorings”. Tadić, M, Arsoski V, Čukarić, N, Peeters FM, Acta physica Polonica: A: general physics, solid state physics, applied physics 117, 974 (2010)
Abstract: The optical excitonic Aharonov-Bohm effect in type-1 three-dimensional (In, Ga)As/GaAs nanorings in theoretically explored. The single-particle states of the electron and the hole are extracted from the effective mass theory in the presence of inhomogeneous strain, and an exact numerical diagonalization approach is used to compute the exciton states and the oscillator strength fx for exciton recombination. We studied both the large lithographically-defined and small self-assembled rings. Only in smaller self-assembled nanorings we found optical excitonic AharonovBohm effect. Those oscillations are established by anticrossings between the optically active exciton states with zero orbital momentum. In lithographically defined rings, whose average radius is 33 nm, fx shows no oscillations, whereas in the smaller self-assembled nanoring with average radius of 11.5 nm oscillations in fx for the ground exciton state are found as function of the magnetic field that is superposed on a linear dependence. These oscillations are smeared out at finite temperature, thus photoluminescence intensity exhibits step-like variation with magnetic field even at temperature as small as 4.2 K.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Impact Factor: 0.469
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“2D semiconductors at the Leuven pulsed field facility”. Bogaerts R, de Keyser A, van Bockstal L, van der Burgt M, van Esch A, Provoost R, Silverans R, Herlach F, Swinnen B, van de Stadt AFW, Koenraad PM, Wolter JH, Karavolas VC, Peeters FM, van de Graaf W, Borghs G, Physicalia magazine 19, 229 (1997)
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
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“Andreev-type states induced by quantum confinement”. Shanenko AA, Croitoru MD, Mints RG, Peeters FM, Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques 2, 611 (2008). http://doi.org/10.1134/S1027451008040216
Abstract: The properties of a clean superconductor with nanoscale dimensions are governed by quantum confinement of the electrons. This results in a spatially inhomogeneous superconducting condensate and in the formation of new Andreev-type quasiparticle states. These states are mainly located beyond regions where the superconducting condensate is enhanced. A numerical self-consistent solution of the Bogoliubov-de Gennes equations for a cylindrical metallic nanowire shows that these new Andreev-type states decrease the ratio of the energy gap to the critical temperature.
Keywords: A1 Journal article; Condensed Matter Theory (CMT); Electron microscopy for materials research (EMAT)
Times cited: 1
DOI: 10.1134/S1027451008040216
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“Angular confinement and direction-dependent transmission in graphene nanostructures with magnetic barriers”. Masir MR, Vasilopoulos P, Matulis A, Peeters FM, AIP conference proceedings 1199, 363 (2009). http://doi.org/10.1063/1.3295453
Abstract: We evaluate the transmission through magnetic barriers in graphene-based nanostructures. Several particular cases are considered: a magnetic step, single and double barriers, delta -function barriers as well as barrier structures with inhomogeneous magnetic field profiles but with average magnetic field equal to zero. The transmission exhibits a strong dependence on the direction of the incident wave vector. In general the resonant structure of the transmission is significantly more pronounced for (Dirac) electrons with linear spectrum compared to that for electrons with a parabolic one.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
DOI: 10.1063/1.3295453
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“Artificial atoms and molecules”. Partoens B, Peeters FM, Physicalia magazine 24, 29 (2002)
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
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“Band structure, density of states, and transmission in graphene bilayer superlattices”. Barbier M, Vasilopoulos P, Peeters FM, Pereira JM, AIP conference proceedings 1199, 547 (2009). http://doi.org/10.1063/1.3295550
Abstract: The energy spectrum and density of states of graphene bilayer superlattices (SLs) are evaluated. We take into account doping and/or gating of the layers as well as tunnel coupling between them. In addition, we evaluate the transmission through such SLs and through single or double barriers. The transmission exhibits a strong dependence on the direction of the incident wave vector.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
DOI: 10.1063/1.3295550
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“Classical atomic bilayers”. Peeters FM, Partoens B, Schweigert VA, Schweigert IV Plenum Press, New York, page 523 (1998).
Keywords: H1 Book chapter; Condensed Matter Theory (CMT)
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“The classical electron gas in artificial structures”. Peeters FM, Partoens B, Kong M, , 235 (2004)
Keywords: P3 Proceeding; Condensed Matter Theory (CMT)
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“Correlation between a remote electron and a two-dimensional electron gas in resonant tunneling devices”. Kato H, Peeters FM, , 843 (2001)
Keywords: P3 Proceeding; Condensed Matter Theory (CMT)
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“A cyclotron resonance study of the resonant polaron coupling in CdTe/CdMgTe quantum wells”. Chang CC, Michels JG, Cheng HH, Nicholas RJ, Peeters FM, Wu XG, Ossau W, Waag A, Landwehr G, , 383 (1997)
Keywords: P3 Proceeding; Condensed Matter Theory (CMT)
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“Density functional theory approach to artificial molecules”. Partoens B, Peeters FM, , 128 (2001)
Keywords: P1 Proceeding; Condensed Matter Theory (CMT)
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“Devices consisting of hybrid systems: ferro-magnetic and superconducting disks on top of a heterojunction”. Peeters FM, Li XQ, Matulis A, , 253 (1997)
Keywords: P3 Proceeding; Condensed Matter Theory (CMT)
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“Different temperature dependence of the phase boundary for multivortex and giant vortex states in mesoscopic superconductors”. Baelus BJ, Kanda A, Peeters FM, Ootuka Y, Kadowaki, AIP conference proceedings
T2 –, 24th International Conference on Low Temperature Physics (LT24), AUG 10-17, 2005, Orlando, FL , 743 (2006)
Abstract: Within the framework of the nonlinear Ginzburg-Landau theory, we calculated the full phase diagram for a superconducting disk with radius R = 4 (T = 0) and we studied the behavior of the penetration and expulsion fields as a function of temperature for multivortex and giant vortex states.
Keywords: P1 Proceeding; Condensed Matter Theory (CMT)
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“Domain coexistence of magnetism and superconductivity : appearance of confined vortex loops”. Doria MM, de Romaguera ARC, Milošević, MV, Peeters FM, Journal of physics : conference series 97, 012070 (2008). http://doi.org/10.1088/1742-6596/97/1/012070
Abstract: A magnetic moment inside an extreme type II superconductor can have three, but not one or two, confined vortex loops near to the core. For a sub-micron superconducting particle the confined vortex loops eventually break up and reach the surface turning into external vortex pairs.
Keywords: P1 Proceeding; Condensed Matter Theory (CMT)
DOI: 10.1088/1742-6596/97/1/012070
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“Electric charges in superconducting mesoscopic samples”. Yampolskii SV, Baelus BJ, Peeters FM, Kolacek J, Czechoslovak journal of physics
T2 –, 11th Czech and Slovak Conference on Magnetism (CSMAG 01), AUG 20-23, 2001, KOSICE, SLOVAKIA 52, 303 (2002). http://doi.org/10.1023/A:1014412905806
Abstract: The distribution of the electric charge density in mesoscopic superconducting disks and cylinders is studied within the phenomenological Ginzburg-Landau approach. We found that, even in the Meissner state the mesoscopic sample exhibits a non-uniform charge distribution such that a region near the sample edge becomes negatively charged. When vortices are inside the sample there is a superposition of the negative charge located at the vortex core and this Meissner charge, and, as a result, the charge at the sample edge changes sign as a function of the applied magnetic field.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
DOI: 10.1023/A:1014412905806
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“Electric field tuning of the band gap in four layers of graphene with different stacking order”. Avetisyan AA, Partoens B, Peeters FM, Proceedings of the Society of Photo-optical Instrumentation Engineers
T2 –, Conference on Photonics and Micro and Nano-structured Materials, JUN 28-30, 2011, Yerevan, ARMENIA , 84140 (2012). http://doi.org/10.1117/12.923618
Abstract: We investigated the effect of different stacking order of the four graphene layer system on the induced band gap when positively charged top and negatively charged back gates are applied to the system. A tight-binding approach within a self-consistent Hartree approximation is used to calculate the induced charges on the different graphene layers. We show that the electric field does not open an energy gap if the multilayer graphene system contains a trilayer part with the ABA Bernal stacking.
Keywords: P1 Proceeding; Engineering sciences. Technology; Condensed Matter Theory (CMT)
DOI: 10.1117/12.923618
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“Enhanced spin and isospin blockade in two vertically coupled quantum dots”. Partoens B, Peeters FM, , 1035 (2001)
Keywords: P1 Proceeding; Condensed Matter Theory (CMT)
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“Exciton states and magnetooptical transitions in stacks of InGaAs/GaAs self-assembled quantum rings”. Tadić, M, Peeters FM, AIP conference proceedings 893, 851 (2007)
Abstract: Electron, hole, and exciton states in the stacks composed of three strained (InGa)As quantum rings were computed. We found considerable influence of strain on both the single particle and exciton spectra, while the oscillator strength for exciton recombination is reduced by the magnetic field.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
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“Excitons and charged excitons in quantum wells”. Riva C, Peeters FM, Varga K, Physica status solidi: A: applied research 178, 513 (2000)
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Times cited: 12
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“Excitons and trions in cylindrical nanowires with dielectric mismatch”. Slachmuylders AF, Partoens B, Magnus W, Peeters FM, Physica status solidi: C: conferences and critical reviews 5, 2416 (2008). http://doi.org/10.1002/pssc.200777650
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Times cited: 3
DOI: 10.1002/pssc.200777650
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“Excitons in single and vertically coupled type II quantum dots in high magnetic fields”. Peeters FM, Janssens KL, Partoens B s.l., page 117 (2003).
Keywords: H1 Book chapter; Condensed Matter Theory (CMT)
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“Experimental distinction between giant vortex and multivortex states in mesoscopic superconductors”. Kanda A, Baelus BJ, Peeters FM, Kadowaki K, Ootuka Y, AIP conference proceedings
T2 –, 24th International Conference on Low Temperature Physics (LT24), AUG 10-17, 2005, Orlando, FL , 739 (2006)
Abstract: We describe an experimental distinction between giant vortex and multivortex states in mesoscopic superconducting disks by using two methods: the multiple-small-tunnel-junction method and the temperature dependence of vortex expulsion fields. The experimental results are in good agreement with the theoretical simulations based on the non-linear Ginzburg-Landau theory.
Keywords: P1 Proceeding; Condensed Matter Theory (CMT)
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“Ferromagnetism in Mn-doped GaAs : the kinematic exchange”. Krstajic PM, Ivanov VA, Peeters FM, Fleurov V, Kikoin K, Journal of superconductivity
T2 –, PASPS Conference 2002, JUL, 2002, WURZBURG, GERMANY 16, 111 (2003). http://doi.org/10.1023/A:1023253205699
Abstract: We developed a microscopic model in order to describe the onset of ferromagnetism (FM) in GaAs:Mn. The proposed kinematic mechanism bears resemblances with the Zener exchange. The calculated Curie temperature for GaAs: Mn is in good agreement with available experimental data of the Curie temperature as a function of the manganese concentration.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Times cited: 2
DOI: 10.1023/A:1023253205699
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“Few-particle states in coupled electron-hole quantum dots”. Anisimovas E, Peeters FM, Functions II , 330 (2003). http://doi.org/10.1142/9789812705129_0029
Abstract: We apply the exact diagonalization technique to calculate the ground and excited states of a bipolar artificial molecule composed of two vertically coupled quantum dots containing different types of carriers electrons and holes in equilibrium. In this system, the magnetic field tunes the relative role of intra-dot Coulomb interaction while the inter-dot separation sets the strength of inter-dot correlations. We find an intricate pattern of the switching of the ground-state angular momentum with increasing magnetic field and a rearrangement of approximate single-particle levels as a function of the inter-dot coupling strength.
Keywords: P1 Proceeding; Condensed Matter Theory (CMT)
DOI: 10.1142/9789812705129_0029
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“Formation of vortex clusters and giant vortices in mesoscopic superconducting disks with strong disorder”. Escoffier W, Grigorieva IV, Misko VR, Baelus BJ, Peeters FM, Vinnikov LY, Dubnos S, Journal of physics : conference series 97, 012172 (2008). http://doi.org/10.1088/1742-6596/97/1/012172
Abstract: Merged, or giant, multi-quanta vortices (GVs) appear in very small superconductors near the superconducting transition due to strong confinement of magnetic flux. Here we present evidence for a new, pinning-related, mechanism for vortex merger. Using Bitter decoration to visualise vortices in small Nb disks, we show that confinement in combination with strong disorder causes individual vortices to merge into clusters/GVs well below Tc and Hc2, in contrast to well-defined shells of individual vortices found in the absence of pinning.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
DOI: 10.1088/1742-6596/97/1/012172
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“Geometry induced defects in a confined Wigner lattice”. Peeters FM, Kong M, Partoens B, , 192 (2002)
Keywords: P1 Proceeding; Condensed Matter Theory (CMT)
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“Graphene-based quantum wires”. Pereira JM Jr, Mlinar V, Peeters FM, Vasilopoulos P, AIP conference proceedings
T2 –, 28th International Conference on the Physics of Semiconductors (ICPS-28), JUL 24-28, 2006, Vienna, AUSTRIA , 721 (2007)
Abstract: We investigate the properties of carriers in graphene-based quantum wires created by potential barriers, by means of analytical and numerical calculations. We obtain expressions for the energy spectrum as a function of barrier height, well width and linear momentum along the wire. The results demonstrate a direction-dependent resonant transmission across the potential well.
Keywords: P1 Proceeding; Condensed Matter Theory (CMT)
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“Ground state configurations of vertically coupled quantum rings”. Castelano LK, Hai G-Q, Partoens B, Peeters FM, Physica status solidi: C: conferences and critical reviews 4, 560 (2007). http://doi.org/10.1002/pssc.200673275
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Times cited: 1
DOI: 10.1002/pssc.200673275
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