Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\28642615
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Sci+Rep
2017 ; 7
(1
): 4058
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
The Bethe-Slater curve revisited; new insights from electronic structure theory
#MMPMID28642615
Cardias R
; Szilva A
; Bergman A
; Marco ID
; Katsnelson MI
; Lichtenstein AI
; Nordström L
; Klautau AB
; Eriksson O
; Kvashnin YO
Sci Rep
2017[Jun]; 7
(1
): 4058
PMID28642615
show ga
The Bethe-Slater (BS) curve describes the relation between the exchange coupling
and interatomic distance. Based on a simple argument of orbital overlaps, it
successfully predicts the transition from antiferromagnetism to ferromagnetism,
when traversing the 3d series. In a previous article [Phys. Rev. Lett. 116,
217202 (2016)] we reported that the dominant nearestneighbour (NN) interaction
for 3d metals in the bcc structure indeed follows the BS curve, but the trends
through the series showed a richer underlying physics than was initially assumed.
The orbital decomposition of the inter-site exchange couplings revealed that
various orbitals contribute to the exchange interactions in a highly non-trivial
and sometimes competitive way. In this communication we perform a deeper analysis
by comparing 3d metals in the bcc and fcc structures. We find that there is no
coupling between the E (g) orbitals of one atom and T (2g) orbitals of its NNs,
for both cubic phases. We demonstrate that these couplings are forbidden by
symmetry and formulate a general rule allowing to predict when a similar
situation is going to happen. In ?-Fe, as in ?-Fe, we find a strong competition
in the symmetry-resolved orbital contributions and analyse the differences
between the high-spin and low-spin solutions.