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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

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

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