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4 article(s) from Manolescu, Andrei

Fabrication and characterization of Si₁₋_xGe_x nanocrystals in as-grown and annealed structures: a comparative study

Muhammad Taha Sultan,
Adrian Valentin Maraloiu,
Ionel Stavarache,
Jón Tómas Gudmundsson,
Andrei Manolescu,
Valentin Serban Teodorescu,
Magdalena Lidia Ciurea and
Halldór Gudfinnur Svavarsson

Full Research Paper
Published 17 Sep 2019

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1. Figure 1: (a) GiXRD diffractograms of MLs annealed from 550–900 °C along with the as-grown MLs. The SiGe crys...
  
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2. Figure 2: GIXRD diffractogram (upper part) with zoomed-in view (lower part) of crystallographic plane (111) o...
  
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3. Figure 3: XRR plot for as-deposited and annealed (for 1 min) structures. The vertical dashed lines illustrate...
  
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4. Figure 4: XTEM images of (a) MLs with 20 nm SiGe layer after 600 °C annealing for 1 min, (b) SAED pattern tak...
  
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5. Figure 5: (a) XTEM image of MLs annealed at 600 °C (1 min) showing columnar morphology of SiGe NCs in the fil...
  
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6. Figure 6: (a) TEM low-magnification image showing the contrast due to the shearing defects appearing in the S...
  
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7. Figure 7: (a) Deconvoluted (Gaussian fit) room-temperature photocurrent spectra of as-grown MLs. (b) Normaliz...
  
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Graphical Abstract

Beilstein J. Nanotechnol. 2019, 10, 1873–1882, doi:10.3762/bjnano.10.182

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Coexisting spin and Rabi oscillations at intermediate time regimes in electron transport through a photon cavity

Vidar Gudmundsson,
Hallmann Gestsson,
Nzar Rauf Abdullah,
Chi-Shung Tang,
Andrei Manolescu and
Valeriu Moldoveanu

Full Research Paper
Published 01 Mar 2019

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1. Figure 1: (Upper) Schematic for a short quantum wire in a 3D photon cavity coupled to semi-infinite external ...
  
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2. Figure 2: The energy spectrum (gold squares) for the interacting closed central system for plunger gate volta...
  
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3. Figure 3: The energy of the two spin components of the lowest in energy one-electron states, mostly localized...
  
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4. Figure 4: The mean electron and photon content in the open central system as a function of time. In additio...
  
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5. Figure 5: The current from the left lead (L) into the central system and the current from the central system ...
  
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6. Figure 6: The current from the left lead (L) into the central system and the current from the central system ...
  
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7. Figure 7: The current from the left lead (L) into the central system and the current from the central system ...
  
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8. Figure 8: The current from the left lead (L) into the central system and the current from the central system ...
  
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9. Figure 9: (Upper) The time-dependent partial current through the photon dressed one-electron states and i...
  
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10. Figure 10: The Fourier power spectrum of the correlation function S_x(τ) = in the steady state. The cavity pho...
  
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Graphical Abstract

Beilstein J. Nanotechnol. 2019, 10, 606–616, doi:10.3762/bjnano.10.61

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Robust topological phase in proximitized core–shell nanowires coupled to multiple superconductors

Tudor D. Stanescu,
Anna Sitek and
Andrei Manolescu

Full Research Paper
Published 22 May 2018

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1. Figure 1: Schematic representation of the chain model for triangular (left) and square (right) core–shell nan...
  
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2. Figure 2: (A) Topological phase diagram for a triangular wire with V_eff() = 0 and = 0. The white areas are t...
  
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3. Figure 3: Dependence of the minimum quasiparticle gap on the Zeeman field along the blue cuts (I) correspondi...
  
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4. Figure 4: Dependence of the minimum quasiparticle gap on the Zeeman field along the dark red cuts (II) corres...
  
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5. Figure 5: (A) Topological phase diagram for a square wire with V_eff() ≠ 0 and = 0. The white areas are topol...
  
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6. Figure 6: (A) Topological phase diagram for a triangular wire with V_eff() ≠ 0 and ₁ = 0, ₃ = π/2, ₅ = −π/2. T...
  
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7. Figure 7: (A) Topological phase diagram for a square wire with V_eff() ≠ 0 and ₁ = π/2, ₃ = −π/2, ₅ = π/2, and ...
  
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8. Figure 8: Dependence of the low-energy spectrum on the Zeeman field for a finite triangular wire of length L ...
  
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9. Figure 9: Dependence of the low-energy spectrum on the Zeeman field for a finite triangular wire of length L ...
  
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10. Figure 10: Low-energy spectra as a function of the Zeeman field for a finite triangular wire of length L = 2.2...
  
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11. Figure 11: Position dependence of the lowest energy wave function corresponding to a finite triangular wire of...
  
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12. Figure 12: (A) Position dependence of the normalized disorder potential along the edge = 3 of a triangular wi...
  
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13. Figure 13: Spatial profiles of the three lowest energy states corresponding to the red dots in Figure 12B. The thick (re...
  
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14. Figure 14: A schematic cross section of the hybrid semiconductor-superconductor experimental device incorporat...
  
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15. Figure 15: Phase boundaries for the triangular wire in the corner-state domain. The color code describes the m...
  
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16. Figure 16: Phase boundaries for the square wire in the corner-state domain. The color code describes the minim...
  
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Graphical Abstract

Beilstein J. Nanotechnol. 2018, 9, 1512–1526, doi:10.3762/bjnano.9.142

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Thermoelectric current in topological insulator nanowires with impurities

Sigurdur I. Erlingsson,
Jens H. Bardarson and
Andrei Manolescu

Full Research Paper
Published 12 Apr 2018

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1. Figure 1: Energy spectra for a) B = 0 and b) B = 4.0 T. Note that the system is gapped at B = 0 but not at B ...
  
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2. Figure 2: a) Transmission function and b) thermoelectric current for two different magnetic fields. In a), th...
  
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3. Figure 3: a) Transmission function and b) thermoelectric current calculated in the presence of impurities at B...
  
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Graphical Abstract

Beilstein J. Nanotechnol. 2018, 9, 1156–1161, doi:10.3762/bjnano.9.107

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