Browsing NTNU Open by Author "Brüne, Christoph"
Now showing items 1-13 of 13
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Advancing Spintronics through Ellipsometric Characterisation of Surface Polaritons
Hale, Nathan Thomas (Doctoral theses at NTNU;2024:133, Doctoral thesis, 2024)Spintronics is a subtopic of magnonics in which the spin of the electron is used to store and process information. Magnonics is the magnetic analogue of the recently popularised field of plasmonics, which deals with the ... -
Angle-resolved Photoelectron Spectroscopy of Epitaxial CuFeS2 Thin Films
Schenk, Richard Justin (Master thesis, 2024)CuFeS2, vanligvis kjent som kopperkis, er en antiferromagnetisk halvleder som har en eksepsjonell høy Néel temperatur på 823 K. Det tette gittermatch med silisium, den hyppige forekomsten av byggeblokker og muligheten til ... -
Approaching Quantization in Macroscopic Quantum Spin Hall Devices through Gate Training
Lunczer, Lukas; Leubner, Philipp; Endres, Martin; Muller, Valentin L; Brüne, Christoph; Buhmann, Hartmut; Molenkamp, Laurens W (Journal article; Peer reviewed, 2019)Quantum spin Hall edge channels hold great promise as dissipationless one-dimensional conductors.However, the ideal quantized conductance of2e2=his only found in very short channels-in contradictionwith the expected ... -
Crystal Asymmetry in Magnets and Superconductors
Brekke, Bjørnulf (Doctoral theses at NTNU;2024:338, Doctoral thesis, 2024)English summary Magnetic materials have shown great technological potential in utilizing the electron spin as a key to read, write, and store information. This has given birth to the emerging field of spintronics or spin ... -
Dielectric function and band gap determination of single crystal CuFeS2 using FTIR-VIS-UV spectroscopic ellipsometry
Hale, Nathan; Hartl, Matthias; Humlíček, Josef; Brüne, Christoph; Kildemo, Morten (Journal article; Peer reviewed, 2023) -
Exploring the Growth Dynamics of Kagome Lattice Thin Films by Molecular Beam Epitaxy
Chatterjee, Payel (Doctoral theses at NTNU;2025:41, Doctoral thesis, 2025)The advancement of spintronic technologies depends on the discovery of novel materials with unique magnetic and topological properties. FeSn, a kagome lattice material with antiferromagnetic ordering, has emerged as a ... -
Low-energy properties of electrons and holes in CuFeS2
Brekke, Bjørnulf; Malyshev, Roman; Svenum, Ingeborg-Helene; Selbach, Sverre Magnus; Tybell, Per Thomas Martin; Brüne, Christoph; Brataas, Arne (Peer reviewed; Journal article, 2022)The antiferromagnetic semiconductor CuFeS2 belongs to a magnetic symmetry class that is of interest for spintronics applications. In addition, its crystal lattice is compatible with Si, making it possible to integrate it ... -
Molecular Beam Epitaxy Growth of the Kagome magnet system Fe-Sn
Johnsrud, Simen (Master thesis, 2022)Kagome-magnetsystemet Fe-Sn er en gruppe krystallstrukturer som består av lag av Fe3Sn og Sn2. Det har blitt vist at magneter i dette systemet har eksotiske kvanteegenskaper, som kan ha anvendelser i nye spintroniske ... -
Proximity-Induced Superconductivity in CdTe-HgTe Core-Shell Nanowires
Hajer, Jan; Kessel, Maximilian; Brüne, Christoph; Stehno, Martin P; Buhmann, Hartmut; Molenkamp, Laurens W (Journal article; Peer reviewed, 2019)In this Letter we report on proximity superconductivity induced in CdTe–HgTe core–shell nanowires, a quasi-one-dimensional heterostructure of the topological insulator HgTe. We demonstrate a Josephson supercurrent in our ... -
Residual strain in free-standing CdTe nanowires overgrown with HgTe
Kessel, Maximilian; Lunczer, Lukas; Tarakina, Nadezda V; Brüne, Christoph; Buhmann, Hartmut; Molenkamp, Laurens W (Journal article; Peer reviewed, 2019)We investigate the crystal properties of CdTe nanowires overgrown with HgTe. Scanning electron microscopy and scanning transmission electron microscopy confirm that the growth results in a high ensemble uniformity and that ... -
Selective area grown ZnTe nanowires as the basis for quasi-one-dimensional CdTe-HgTe multishell heterostructures
Hajer, Jan; Mantei, Willi; Kessel, Maximilian; Brüne, Christoph; Wenner, Sigurd; Van Helvoort, Antonius; Buhmann, Hartmut; Molenkamp, Laurens W. (Peer reviewed; Journal article, 2020)Selective area growth is employed in the vapor-liquid-solid molecular beam epitaxy of ZnTe nanowire arrays. Full control over the location of the individual nanowires is achieved by defined positioning of the growth catalyst. ... -
Ultrafast nonlocal collective dynamics of Kane plasmon-polaritons in a narrow-gap semiconductor
Charnukha, A; Sternbach, A; Stinson, HT; Schlereth, R; Brüne, Christoph; Molenkamp, Laurens W; Basov, DN (Journal article; Peer reviewed, 2019)The observation of ultrarelativistic fermions in condensed-matter systems has uncovered a cornucopia of novel phenomenology as well as a potential for effective ultrafast light engineering of new states of matter. While ... -
Use of 4x4 transfer matrix method in the study of surface magnon polaritons via simulated attenuated total reflection measurements on the antiferromagnetic semiconductor MnF2
Hale, Nathan; Simonsen, Ingve; Brüne, Christoph; Kildemo, Morten (Peer reviewed; Journal article, 2022)The surface magnon polaritons (SMPs) present in thin film antiferromagnet semiconductors can be extremely confined, having most of their energy distributed within the magnetic medium. For extremely thin films these SMPs ...