Zobrazeno 1 - 10
of 146
pro vyhledávání: '"Kampf, Arno P."'
In two dimensions, an s-wave superconductor in the presence of Rashba spin-orbit coupling possesses distinct topologically non-trivial ground state phases controlled by Zeeman splitting and band filling. These phases can be characterized in terms of
Externí odkaz:
http://arxiv.org/abs/2104.09651
Publikováno v:
Phys. Rev. B 102, 155138 (2020)
ZrTe$_5$ is considered a potential candidate for either a Dirac semimetal or a topological insulator in close proximity to a topological phase transition. Recent optical conductivity results motivated a two-band model with a conical dispersion in 2D,
Externí odkaz:
http://arxiv.org/abs/2007.15292
Publikováno v:
Phys. Rev. B 100, 235427 (2019)
At the heart of the study of topological insulators lies a fundamental dichotomy: topological invariants are defined in infinite systems, but surface states as their main footprint only exist in finite systems. In the slab geometry, namely infinite i
Externí odkaz:
http://arxiv.org/abs/1909.11782
Publikováno v:
Phys. Rev. B 97, 214507 (2018)
A magnetic adatom chain, proximity coupled to a conventional superconductor with spin-orbit coupling, exhibits locally an odd-parity, spin-triplet pairing amplitude. We show that the singlet-triplet junction, thus formed, leads to a net spin accumula
Externí odkaz:
http://arxiv.org/abs/1710.02331
In-gap features in superconducting LaAlO$_3$-SrTiO$_3$ interfaces observed by tunneling spectroscopy
Autor:
Kuerten, Lukas, Richter, Christoph, Mohanta, Narayan, Kopp, Thilo, Kampf, Arno, Mannhart, Jochen, Boschker, Hans
Publikováno v:
Phys. Rev. B 96, 014513 (2017)
We identified quasiparticle states at well-defined energies inside the superconducting gap of the electron system at the LaAlO$_3$-SrTiO$_3$ interface using tunneling spectroscopy. The states are found only in a number of samples and depend upon the
Externí odkaz:
http://arxiv.org/abs/1704.02122
Publikováno v:
Phys. Rev. B 96, 024508 (2017)
A conventional superconductor with spin-orbit coupling turns into a topological superconductor beyond a critical strength of the Zeeman energy. The spin-expectation values $\mathbf{S}(\mathbf{k})$ in momentum space trace this transition via a charact
Externí odkaz:
http://arxiv.org/abs/1701.00788
Publikováno v:
Scientific Reports 7, 45664 (2017)
The quantum anomalous Hall effect has been theoretically predicted and experimentally verified in magnetic topological insulators. In addition, the surface states of these materials exhibit a hedgehog-like "spin" texture in momentum space. Here, we a
Externí odkaz:
http://arxiv.org/abs/1607.04493
We present evidence for the existence of a spontaneous instability towards an orbital loop-current phase in a multiorbital Hubbard model for the CuO$_2$ planes in cuprates. Contrary to the previously proposed $\theta_{II}$ phase with intra-unit cell
Externí odkaz:
http://arxiv.org/abs/1503.08896
Publikováno v:
Scientific Reports 5, 15302 (2015)
The verification of topological superconductivity has become a major experimental challenge. Apart from the very few spin-triplet superconductors with p-wave pairing symmetry, another candidate system is a conventional, two-dimensional (2D) s-wave su
Externí odkaz:
http://arxiv.org/abs/1412.6295
Autor:
Pradhan, Kalpataru, Kampf, Arno P.
Publikováno v:
Phys. Rev. B 88, 115136 (2013)
We use a two-orbital double-exchange model including Jahn-Teller lattice distortions, superexchange interactions, and long-range Coulomb (LRC) interactions to investigate the origin of magnetically disordered interfaces between ferromagnetic metallic
Externí odkaz:
http://arxiv.org/abs/1306.3453