Chirality-Induced Spin Selectivity (CISS) Effect

Magnetocurrent-Voltage Characteristics with Coulomb Interactions I

Journal Article (2023)
Author(s)

K.H. Huisman (Kavli institute of nanoscience Delft, TU Delft - QN/Thijssen Group)

Jan Brian Mi Yu Heinisch (Kavli institute of nanoscience Delft, Student TU Delft)

Joseph M. Thijssen (Kavli institute of nanoscience Delft, TU Delft - QN/Thijssen Group)

Research Group
QN/Thijssen Group
Copyright
© 2023 K.H. Huisman, Jan Brian Mi Yu Heinisch, J.M. Thijssen
DOI related publication
https://doi.org/10.1021/acs.jpcc.2c08807
More Info
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Publication Year
2023
Language
English
Copyright
© 2023 K.H. Huisman, Jan Brian Mi Yu Heinisch, J.M. Thijssen
Research Group
QN/Thijssen Group
Issue number
14
Volume number
127
Pages (from-to)
6900-6905
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Abstract

One of the manifestations of chirality-induced spin selectivity (CISS) is the appearance of a magnetocurrent. Magnetocurrent is the observation that the charge currents at finite bias in a two terminal device for opposite magnetizations of one of the leads differ. Magnetocurrents can only occur in the presence of interactions of the electrons either with vibrational modes or among themselves through the Coulomb interaction. In experiments on chiral molecules assembled in monolayers, the magnetocurrent seems to be dominantly cubic (odd) in bias voltage while theory finds a dominantly even bias voltage dependence. Thus far, theoretical work has predicted a magnetocurrent which is even bias. Here we analyze the bias voltage dependence of the magnetocurrent numerically and analytically involving the spin-orbit and Coulomb interactions (through the Hartree-Fock and Hubbard One approximations). For both approximations it is found that for strong Coulomb interactions the magnetocurrent is dominantly odd in bias voltage, confirming the symmetry observed in experiment.