- Introduction
-
Aims
-
Česká verze
Co-investigator-1:
prof. Ing. Čestmír Drašar, Dr.
University of Pardubice
Faculty of Chemical Technology, Department of Physical Chemistry
Tel. 466 036 036
e-mail cestmir.drasar@upce.cz
Principal investigator:
Kyohoon Ahn Ph.D.
Institute of Physics of the AS CR, v.v.i., Prague
The project deals with a theoretical investigation of transverse transport properties, namely anomalous Hall and Nernst effects (AHE, ANE), in solid solutions exhibiting antiferromagnetic (AFM) order with broken time-reversal symmetry (noncolinear, altermagnetic). Three different calculation approaches will be compared: 1) the virtual crystal approximation, 2) the coherent potential approximation, and 3) the calculation in supercell combined with unfolding method. The theory will be confronted with experiments on single crystals. For the case study we will employ the unique Mn(1-x)Cr(x)Sb (x=0-1) and CrSe systems of hexagonal symmetry exhibiting various, predominantly AFM, structures with high ordering temperatures. The MnSb is ferromagnet with TC=600K, the CrSb belongs to altermagnets with exceptionally high TN=710K and spin splitting, but suppressed AHE due to symmetry reasons. Using our approaches, we intend to demonstrate the presence of AFM phases with non-zero AHE(ANE) within this system (x~0.4) and validate suitable methods to reveal such phases in solid solutions compounds.
Keywords:
antiferomagnety;anomální Hallův jev;anomální Nernstův jev;ab-initio výpočty;MnSb;CrSb;CrSe
Aims
The proposal aims to calculate the transverse transport properties in predominantly antiferromagnetic solid solution materials and related phases with broken time-reversal symmetry. Theoretical approaches will be confronted with experiments on Mn1-xCxSb and CrSe single crystals.
Česká verze
