مجله فصل مشترک ها، لایه های نازک و سیستم های با بعد کم
اثر عیوب تهی جائی بر جریان جوزفسونی در نانوریبون زیگزاگی
نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه فیزیک، دانشگاه الزهرا، تهران، ایران
2 گروه فیزیک، دانشگاه تحصیلات تکمیلی علوم پایه گاوازنگ، زنجان، ایران
چکیده
ما جریان جوزفسون را در یک اتصال ابررسانا/نوار باریک زیگزاگ گرافن/ابررسانا (Sc-ZGNS-Sc) با نقص های تهی جائی بررسی می کنیم. برای این منظور ، ما روش عددی مبتنی بر تابع بازگشتی را به ZGNS ها بسط داده و تأثیر تهی جاها شامل توزیع های تک تهی جای تصادفی و نقص های خطی زنجیره ای از تهی جاها را در نظر می گیریم. ما چگونگی تغییر جریان جوزفسون تحت تأثیر طول و عرض نوار و غلظت تحت موقعیت های تهی جاها بررسی می کنیم. دریافتیم که جریان جوزفسون وابستگی نمایی به غلظت تهی جائی دارد. ضریب توان یک تابع غیر خطی از طول شبکه و غلظت تهی جاها است. برای وابستگی جریان جوزفسون به عرض ZGNR ما یک رابطه خطی بین جریان جوزفسون پیدا کردیم که یک سازوکار نیمه کلاسیک از انتقال الکترون در این سیستم پیشنهاد می کند. در نهایت، ما اثر عیوب خطی زنجیره ای را مطالعه می کنیم و آنها را با موقعیت های تهی جائی منفرد به طور تصادفی مقایسه می کنیم.
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