کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1811896 1025603 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Resonant photoemission spectroscopy studies of the magnetic phase transitions in Pr0.5Sr0.5MnO3Pr0.5Sr0.5MnO3
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Resonant photoemission spectroscopy studies of the magnetic phase transitions in Pr0.5Sr0.5MnO3Pr0.5Sr0.5MnO3
چکیده انگلیسی

The valence band electronic structure of Pr0.5Sr0.5MnO3 has been investigated using resonant photoemission spectroscopies across its paramagnetic metallic (PMM)–ferromagnetic metallic (FMM)–antiferromagnetic insulator (AFMI) transition. Using bulk sensitive soft X-ray photoemission, we have confirmed the presence of a gap in the near Fermi level electronic spectrum in the charge ordering (CO) antiferromagnetic insulator (AFMI) phase. The Fermi level exhibits a rigid-band-like shift of about ∼0.4eV across the PMM to AFMI transition. Further, we have observed a similar shift of the Pr 4f states to higher binding energies when the sample goes to the CO-AFMI state. The spectral behavior indicates a strong charge carrier localization associated with a charge-density-wave gap related to the CO. On the other hand, the growth of spectral weight at the Fermi level in the PMM state could well be connected to the microscopic phase-separation model.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 406, Issue 18, 15 September 2011, Pages 3519–3523
نویسندگان
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