کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10653459 1002880 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the possibility of a phonon mediated transport anomaly in MgB2 under compression
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
On the possibility of a phonon mediated transport anomaly in MgB2 under compression
چکیده انگلیسی
Results of electrical resistance measurements on MgB2 at ambient temperature up to 25 GPa are presented. An abrupt reduction of nearly 30% in resistance around 18 GPa is observed. Band structure calculations in the presence of a frozen-in distortion of the E2g phonon mode reveal that one of the closed Fermi sheets corresponding to the σ-band opens along the Γ-A direction at this pressure. It is suggested that the anomaly observed in the resistance is due to this phonon mediated electronic topological transition (ETT).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 135, Issue 5, August 2005, Pages 285-289
نویسندگان
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