# High-resolution Resonance Spin-flip Raman Spectroscopy of Pairs of Manganese Ions in CdTe

## TL;DR

This study uses high-resolution resonance spin-flip Raman spectroscopy to analyze Mn ion pairs in CdTe quantum wells, revealing detailed exchange interactions and confirming known nearest-neighbor exchange constants.

## Contribution

It provides precise experimental classification of Mn pair clusters and measures multiple exchange constants, enhancing understanding of magnetic interactions in diluted magnetic semiconductors.

## Key findings

- Identified four characteristic energies corresponding to Mn pair clusters.
- Measured exchange constants J_1=6.15 K, J_{(2)}=1.80 K, J_{(3)}=1.39 K, J_{(4)}=0.81 K.
- Demonstrated high-resolution Raman spectroscopy's capacity to analyze magnetic interactions.

## Abstract

We report the observation of tens of minor lines of the combinational spin-flip Raman scattering in a CdTe:Mn quantum well by means of the high-resolution optical spectroscopy. Classification of this manifold leads to four characteristic values of energy, that correspond to four different types of pair clusters of Mn ions: the nearest, second, third etc. neighbors. All the four energies show up in a single experiment with a very high precision, providing experimental grounds for a deeper understanding of the d-d exchange interactions in a diluted magnetic semiconductor and demonstrating the capacity of the employed method. The major (nearest-neighbor) exchange constant J_1 = 6.15 K was found to consent with its previously reported value. Other detected characteristic energies are as follows: J_{(2)} = 1.80 K, J_{(3)} = 1.39 K, J_{(4)} = 0.81 K.

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Source: https://tomesphere.com/paper/1903.01276