Electronic structure of NiS$_{1-x}$Se$_x$ across the phase transition

Bangalore (2) Freie Universit\"at; Berlin); C. Sch\"u{\ss}ler-Langeheine(2); D. D. Sarma(1); E. Weschke(2); G. Kaindl(2) ((1)Indian Institute of Science; L. Kilian(2); Nirmala Chandrasekharan(1); S. R. Krishnakumar(1)

arxiv: cond-mat/9803110 · v1 · submitted 1998-03-10 · ❄️ cond-mat.str-el

Electronic structure of NiS_(1-x)Se_x across the phase transition

D. D. Sarma(1) , S. R. Krishnakumar(1) , Nirmala Chandrasekharan(1) , E. Weschke(2) , C. Sch\"u{\ss}ler-Langeheine(2) , L. Kilian(2) , G. Kaindl(2) ((1)Indian Institute of Science , Bangalore (2) Freie Universit\"at

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keywords acrossantiferromagneticphasetemperaturetransitionalongbrillouincaused

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We report very highly resolved photoemission spectra of NiS(1-x)Se(x) across the so-called metal-insulator transition as a function of temperature as well as composition. The present results convincingly demonstrate that the low temperature, antiferromagnetic phase is metallic, with a reduced density of states at E$_F$. This decrease is possibly due to the opening of gaps along specific directions in the Brillouin zone caused by the antiferromagnetic ordering.

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Electronic structure of NiS_(1-x)Se_x across the phase transition

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