Browsing NTNU Open by Author "Linder, Jacob"

Now showing items 41-60 of 141

    • Induced unconventional superconductivity on the surface states of Bi2Te3 topological insulator 

      Charpentier, Sophie; Galletti, Luca; Kunakova, Gunta; Arpaia, Riccardo; Song, Yuxin; Baghdadi, Reza; Wang, Shu Min; Kalaboukhov, Alexei; Olsson, Eva; Tafuri, Francesco; Golubev, Dmitry; Linder, Jacob; Bauch, Thilo; Lombardi, Floriana (Journal article; Peer reviewed, 2017)
      Topological superconductivity is central to a variety of novel phenomena involving the interplay between topologically ordered phases and broken-symmetry states. The key ingredient is an unconventional order parameter, ...

    • Interplay between superconductivity and ferromagnetism on a topological insulator 

      Linder, Jacob; Tanaka, Yukio; Yokoyama, Takehito; Sudbø, Asle; Nagaosa, Naoto (Journal article; Peer reviewed, 2010)
      We study theoretically proximity-induced superconductivity and ferromagnetism on the surface of a topological insulator. In particular, we investigate how the Andreev-bound states are influenced by the interplay between ...

    • Intrinsic magnetization of antiferromagnetic textures 

      Tveten, Erlend Grytli; Muller, Tristan; Linder, Jacob; Brataas, Arne (Journal article, 2016)
      Antiferromagnets (AFMs) exhibit intrinsic magnetization when the order parameter spatially varies. This intrinsic spin is present even at equilibrium and can be interpreted as a twisting of the homogeneous AFM into a state ...

    • Intrinsic paramagnetic meissner effect due to s-wave odd-frequency superconductivity 

      Di Bernardo, Angelo; Salman, Zaher; Wang, Xiaolei; Amado Montera, Maria; Egilmez, Mehert Mert; Flokstra, Machiel G.; Suter, Andreas; Lee, Steve L.; Zhao, Jianhua; Prokscha, Thomas; Morenzoni, Elvezio; Blamire, Mark G.; Linder, Jacob; Robinson, Jason W.A. (Journal article; Peer reviewed, 2015)
      Since its discovery in 1911, superconductivity has remained one of the most intriguing phase transitions in the field of condensed-matter physics. Superconductivity, which occurs in certain materials cooled below a critical ...

    • Inverse proximity effect in s-wave and d-wave superconductors coupled to topological insulators 

      Hugdal, Henning Goa; Amundsen, Morten; Linder, Jacob; Sudbø, Asle (Journal article; Peer reviewed, 2019)
      We study the inverse proximity effect in a bilayer consisting of a thin s- or d-wave superconductor (S) and a topological insulator (TI). Integrating out the topological fermions of the TI, we find that spin-orbit coupling ...

    • Josephson effect in S/F/S junctions: Spin bandwidth asymmetry versus Stoner exchange 

      Annunziata, Gaetano; Enoksen, Henrik; Linder, Jacob; Cuoco, Mario; Noce, Canio; Sudbø, Asle (Journal article; Peer reviewed, 2011)
      We analyze the dc Josephson effect in a ballistic superconductor/ferromagnet/superconductor junction by means of the Bogoliubov–de Gennes equations in the quasiclassical Andreev approximation. We consider the possibility ...

    • Josephson effect through magnetic skyrmions 

      Yokoyama, Takehito; Linder, Jacob (Journal article; Peer reviewed, 2015)
      We discover that the multiple degrees of freedom associated with magnetic skyrmions—size, position, and helicity—can all be used to control the Josephson effect and 0 − π transitions occurring in superconductor/magnetic ...

    • Long-ranged triplet supercurrent in a single in-plane ferromagnet with spin-orbit coupled contacts to superconductors 

      Eskilt, Johannes Røsok; Amundsen, Morten; Banerjee, Niladri; Linder, Jacob (Journal article; Peer reviewed, 2019)
      By converting conventional spin-singlet Cooper pairs to polarized spin-triplet pairs, it is possible to sustain long-ranged spin-polarized supercurrents flowing through strong ferromagnets. Obtaining such a conversion via ...

    • Magnetic control of superconducting heterostructures using compensated antiferromagnets 

      Johnsen, Lina G.; Jacobsen, Sol; Linder, Jacob (Peer reviewed; Journal article, 2021)
      Due to the lack of a net magnetization both at the interface and in the bulk, antiferromagnets with compensated interfaces may appear incapable of influencing the phase transition in an adjacent superconductor via the spin ...

    • Magnetization dynamics and Majorana fermions in ferromagnetic Josephson junctions along the quantum spin Hall edge 

      Black-Schaffer, Annica; Linder, Jacob (Journal article; Peer reviewed, 2011)
      We investigate the interplay between ferromagnetic and superconducting order at the edge of a quantum spin Hall insulator. Using complementary analytical and self-consistent numerical approaches, we study a ferromagnetic ...

    • Magnetization dynamics in ferromagnetic, antiferromagnetic and superconducting systems 

      Simensen, Haakon Thømt (Doctoral theses at NTNU;2021:197, Doctoral thesis, 2021)
      The electron spin is an intrinsic property of the electron, just as its charge. Its spin is binary of nature, and is therefore well suited for encoding 0’s and 1’s in computers. The technology aiming to utilize the electron ...

    • Magnetization reorientation due to the superconducting transition in heavy-metal heterostructures 

      Johnsen, Lina G.; Banerjee, Niladri; Linder, Jacob (Journal article; Peer reviewed, 2019)
      Recent theoretical and experimental work has demonstrated how the superconducting critical temperature (Tc) can be modified by rotating the magnetization of a single homogeneous ferromagnet proximity-coupled to the ...

    • Magnon Spin Current Induced by Triplet Cooper Pair Supercurrents 

      Johnsen, Lina G.; Simensen, Haakon Thømt; Brataas, Arne; Linder, Jacob (Peer reviewed; Journal article, 2021)
      At the interface between a ferromagnetic insulator and a superconductor there is a coupling between the spins of the two materials. We show that when a supercurrent carried by triplet Cooper pairs flows through the ...

    • Majorana fermions in spin-orbit-coupled ferromagnetic Josephson junctions 

      Black-Schaffer, Annica; Linder, Jacob (Journal article; Peer reviewed, 2011)
      We study all possible Majorana modes in two-dimensional spin-orbit-coupled ferromagnetic superconductor–normal state–superconductor (SNS) Josephson junctions and propose experiments to detect them. With the S region in a ...

    • Majorana fermions manifested as interface states in semiconductor hybrid structures 

      Linder, Jacob; Sudbø, Asle (Journal article; Peer reviewed, 2010)
      Motivated by recent proposals for the generation of Majorana fermions in semiconducting hybrid structures, we examine possible experimental fingerprints of such excitations. Whereas previous works mainly have focused on ...

    • Manipulating superconductivity in magnetic nanostructures in and out of equilibrium 

      Ouassou, Jabir Ali (Doctoral theses at NTNU;2019:57, Doctoral thesis, 2019)
      We consider nanostructures that are constructed from superconducting, ferromagnetic, and spin–orbit-coupled materials. These structures are analyzed both theoretically and numerically, under both equilibrium and nonequilibrium ...

    • Meissner effect probing of odd-frequency triplet pairing in superconducting spin valves 

      Alidoust, Mohammad; Halterman, K; Linder, Jacob (Journal article, 2014)
      Superconducting correlations which are long ranged in magnetic systems have attracted much attention due to their spin-polarization properties and potential use in spintronic devices. Whereas experiments have demonstrated ...

    • Microwave control of the superconducting proximity effect and minigap in magnetic and normal metals 

      Linder, Jacob; Amundsen, Morten; Ouassou, Jabir Ali (Journal article; Peer reviewed, 2016)
      We demonstrate theoretically that microwave radiation applied to superconducting proximity structures controls the minigap and other spectral features in the density of states of normal and magnetic metals, respectively. ...

    • Monte-Carlo studies of multi-component Ginzburg-Landau theories with competing interactions 

      Galteland, Peder Notto (Doctoral thesis at NTNU;2016:214, Doctoral thesis, 2016)
      This thesis presents four research papers in the field of condensed-matter theory. Three of the papers make use of large-scale Monte-Carlo simulations to explore various aspects of Bose-Einstein condensates with multiple ...

    • Non-Fraunhofer Interference Pattern in Inhomogeneous Ferromagnetic Josephson Junctions 

      Alidoust, Mohammad; Sewell, Granville; Linder, Jacob (Journal article, 2012)
      Generic conditions are established for producing a non-Fraunhofer response of the critical supercurrent subject to an external magnetic field in ferromagnetic Josephson junctions. Employing the quasiclassical Keldysh-Usadel ...