Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gate-controlled proximity magnetoresistance in In1-xGaxAs/(Ga,Fe)Sb
  bilayer heterostructures   The magnetic proximity effect (MPE), ferromagnetic coupling at the interface
of magnetically dissimilar layers, attracts much attention as a promising
pathway for introducing ferromagnetism into a high-mobility non-magnetic
conducting channel. Recently, our group found giant proximity magnetoresistance
(PMR), which is caused by MPE at an interface between a non-magnetic
semiconductor InAs quantum well (QW) layer and a ferromagnetic semiconductor
(Ga,Fe)Sb layer. The MPE in the non-magnetic semiconductor can be modulated by
applying a gate voltage and controlling the penetration of the electron
wavefunction in the InAs QW into the neighboring insulating ferromagnetic
(Ga,Fe)Sb layer. However, optimal conditions to obtain strong MPE at the
InAs/(Ga,Fe)Sb interface have not been clarified. In this paper, we
systematically investigate the PMR properties of In1-xGaxAs (x = 0%, 5%, 7.5%,
and 10%) / (Ga,Fe)Sb bilayer semiconductor heterostructures under a wide range
of gate voltage. The inclusion of Ga alters the electronic structures of the
InAs thin film, in particular changing the effective mass and the QW potential
of electron carriers. Our experimental results and theoretical analysis of the
PMR in these In1-xGaxAs/(Ga,Fe)Sb heterostructures show that the MPE depends
not only on the degree of penetration of the electron wavefunction into
(Ga,Fe)Sb but also on the electron density. These findings help us to unveil
the microscopic mechanism of MPE in semiconductor-based
non-magnetic/ferromagnetic heterojunctions.

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The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
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The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph