scholarly journals Spin-polarized states of matter on the surface of a three-dimensional topological insulator with implanted magnetic atoms

2012 ◽  
Vol 85 (12) ◽  
Author(s):  
S. Caprara ◽  
V. V. Tugushev ◽  
P. M. Echenique ◽  
E. V. Chulkov
Keyword(s):  
Topological Insulator ◽  
Three Dimensional ◽  
Spin Polarized

scholarly journals The impact of metallic contacts on spin-polarized photocurrents in topological insulator Bi 2 Se 3 nanowires

2020 ◽  
Vol 117 (26) ◽  
pp. 262401
Author(s):  
N. Meyer ◽  
K. Geishendorf ◽  
J. Walowski ◽  
A. Thomas ◽  
M. Münzenberg
Keyword(s):  
Topological Insulator ◽  
Metallic Contacts ◽  
Spin Polarized ◽  
The Impact

scholarly journals Erratum: Magnetotransport signatures of three-dimensional topological insulator nanostructures [Phys. Rev. B 97 , 245429 (2018)]

2021 ◽  
Vol 103 (7) ◽  
Author(s):  
Kristof Moors ◽  
Peter Schüffelgen ◽  
Daniel Rosenbach ◽  
Tobias Schmitt ◽  
Thomas Schäpers ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Three Dimensional

scholarly journals Mobility spectrum analysis on three-dimensional topological insulator BiSbTeSe2

2021 ◽  
Vol 118 (25) ◽  
pp. 253107
Author(s):  
Jimin Wang ◽  
Alexander Kurzendorfer ◽  
Lin Chen ◽  
Zhiwei Wang ◽  
Yoichi Ando ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Spectrum Analysis ◽  
Three Dimensional ◽  
Mobility Spectrum

scholarly journals Breathing distortions in the metallic, antiferromagnetic phase of LaNiO$_3$

2018 ◽  
Vol 5 (3) ◽  
Author(s):  
Alaska Subedi
Keyword(s):  
Density Functional ◽  
Recent Observation ◽  
Quantum Critical Point ◽  
Three Dimensional ◽  
Density Functional Theory Calculations ◽  
Antiferromagnetic Phase ◽  
Functional Theory ◽  
Antiferromagnetic Ordering ◽  
Spin Polarized ◽  
Structural Fluctuations

I study the structural and magnetic instabilities in LaNiO_33 using density functional theory calculations. From the non-spin-polarized structural relaxations, I find that several structures with different Glazer tilts lie close in energy. The PnmaPnma structure is marginally favored compared to the R\overline{3}cR3¯c structure in my calculations, suggesting the presence of finite-temperature structural fluctuations and a possible proximity to a structural quantum critical point. In the spin-polarized relaxations, both structures exhibit the \uparrow\!\!0\!\!\downarrow\!\!0↑0↓0 antiferromagnetic ordering with a rock-salt arrangement of the octahedral breathing distortions. The energy gain due to the breathing distortions is larger than that due to the antiferromagnetic ordering. These phases are semimetallic with small three-dimensional Fermi pockets, which is largely consistent with the recent observation of the coexistence of antiferromagnetism and metallicity in LaNiO_33 single crystals by Guo et al. [Nat. Commun. 9, 43 (2018)].

scholarly journals Exceptional topological insulators

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
M. Michael Denner ◽  
Anastasiia Skurativska ◽  
Frank Schindler ◽  
Mark H. Fischer ◽  
Ronny Thomale ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Three Dimensional ◽  
Surface States ◽  
Exceptional Point ◽  
Weyl Semimetal ◽  
Complex Eigenvalues ◽  
Topological State ◽  
Single Sheet ◽  
Bulk Energy ◽  
State Of Matter

AbstractWe introduce the exceptional topological insulator (ETI), a non-Hermitian topological state of matter that features exotic non-Hermitian surface states which can only exist within the three-dimensional topological bulk embedding. We show how this phase can evolve from a Weyl semimetal or Hermitian three-dimensional topological insulator close to criticality when quasiparticles acquire a finite lifetime. The ETI does not require any symmetry to be stabilized. It is characterized by a bulk energy point gap, and exhibits robust surface states that cover the bulk gap as a single sheet of complex eigenvalues or with a single exceptional point. The ETI can be induced universally in gapless solid-state systems, thereby setting a paradigm for non-Hermitian topological matter.

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