Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pseudospin-valve effect on transport in junctions of three-dimensional
  topological insulator surfaces   We show that the surface states of pristine 3D topological insulators (TIs)
are analogs of ferromagnetic half metals due to complete polarization of an
emergent momentum independent pseudospin (SU(2)) degree of freedom on the
surface. To put this claim on firm footing, we present results for TI surfaces
perpendicular to the crystal growth axis, which clearly show that the tunneling
conductance between two such TI surfaces of the same TI material is dominated
by this half metallic behavior leading to physics reminiscent of a spin-valve.
Further using the generalized tunnel magnetoresistance derived in this work we
also study the tunneling current between arbitrary TI surfaces. We also perform
a comprehensive study of the effect of all possible surface potentials allowed
by time reversal symmetry on this spin-valve effect and show that it is robust
against most of such potentials.

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The categories of this paper are: nlin
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The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
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The categories of this paper are: solv-int