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Large magnetothermopower effect in Dirac materials (Sr/Ca)MnBi2
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10.1063/1.3695155
/content/aip/journal/apl/100/11/10.1063/1.3695155
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/11/10.1063/1.3695155
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Resistivity ρ ((a), (d)) thermopower S ((b), (e)), and thermal conductivity κ ((c), (f)) for SrMnBi2 ((a)–(c)) and CaMnBi2 ((d)–(f)) in 0 T (squares) and 9 T (circles) magnetic field, respectively. The inset in (a) shows the specific heat data in the low temperature range as Cp /T vs. T 2 and the line is the fitting results for SrMnBi2. The inset in (b) shows the linear fitting results of S in low temperature range. The inset in (c) shows the charge carrier (κc ) and lattice thermal conductivity (κph ).

Image of FIG. 2.
FIG. 2.

(Color online) Magnetic field dependence of the magnetothermopower ratio ΔS = |(S(H) − S(0))/S(0)| for SrMnBi2 (a) and CaMnBi2 (b), as well as the apparent carrier density derived from Hall resistivity for CaMnBi2 (c), at 10, 20, and 50 K, respectively.

Image of FIG. 3.
FIG. 3.

(Color online) (a) The total density of states (DOS) and local DOS from Ca, Mn, Bi square nets (Bi1) and another type of Bi (Bi2), for SrMnBi2 respectively. (b) The band structure of for SrMnBi2. The dashed line indicates the position of Fermi energy.

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/content/aip/journal/apl/100/11/10.1063/1.3695155
2012-03-16
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Large magnetothermopower effect in Dirac materials (Sr/Ca)MnBi2
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/11/10.1063/1.3695155
10.1063/1.3695155
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