Table 1 The magnetic exchange energies extracted from the Raman spectra.

From: Interplay of Dirac electrons and magnetism in CaMnBi2 and SrMnBi2

 

SJ 1 (meV)

SJ 2 (meV)

SJ c (meV)

a (Å)

d (Å)

CaMnBi2

20.77 (0.79)

7.29 (0.48)

−1.31 (0.10)

4.50*

11.07*

SrMnBi2

16.00 (0.30)

4.75 (0.17)

2.92 (0.09)

4.58*

11.57*

BaMn2Bi2

21.45 (0.32)/21.7(1.5)†

6.26 (0.20)/7.85(1.4)†

0.78 (0.08)/1.26(0.02)†

4.49†

7.34†

  1. Here, a is the in-plane lattice constant and d the distance between the neighbouring MnBi layers.
  2. *ref. 18.
  3. †ref. 19.
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