کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8163882 | 1525663 | 2018 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The phonon and electron heat capacities of cuprate superconductors
ترجمه فارسی عنوان
توانایی های فونون و الکترون در ابررساناهای کوپرات
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
چکیده انگلیسی
Expressions for renormalized phonon density of states (RPDOS), renormalized electron density of states (REDOS), phonon heat capacity (PHC) and electronic heat capacity (EHC) have been derived based on quantum dynamical many body double time thermodynamic Green's function (GF) theory of phonons and electrons using the effects of phonons, electrons, point impurities and anharmonicities. The theory thus developed is applied to the representative high temperature superconductor (HTS) YBa2Cu3O7âδ through numerical computation. It is found that the PHC can be resolved into diagonal and non-diagonal contributions, which are significantly influenced by defects and anharmonicities. The EHC contribution is much smaller than that of PHC. A successful agreement between theory and experiment has been observed for YBa2Cu3O7âδ. The presence of electron-phonon coupling constant in each term of EHC is an additional and new feature of the theory.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity and its Applications - Volume 551, 15 August 2018, Pages 55-65
Journal: Physica C: Superconductivity and its Applications - Volume 551, 15 August 2018, Pages 55-65
نویسندگان
Anushri Gupta, Anita Kumari, Sanjeev K. Verma, B.D. Indu,