Emergence of d±ip -wave superconducting state at the edge of d -wave superconductors mediated by ferromagnetic fluctuations driven by Andreev bound states

Andreev bound states in rounded corners of d-wave superconductors

Andreev bound states at boundaries of d-wave superconductors are strongly influenced by the boundary geometry itself. In this work, the zero-energy spectral weight of the local quasiparticle density of states is presented for the case of wedge-shaped boundaries with rounded corners. Generally, both orientation of the d-wave and the specific local reflection properties of the rounded wedges dete...

control of the optical properties of nanoparticles by laser fields

در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...

Andreev conductance in the d plus id(')-wave superconducting states of graphene

Andreev conductance in the d+ id!-wave superconducting states of graphene

Yongjin Jiang,1,2 Dao-Xin Yao,2 Erica W. Carlson,2 Han-Dong Chen,3 and JiangPing Hu2 1Department of Physics, ZheJiang Normal University, Jinhua, Zhejiang 321004, People’s Republic of China 2Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA 3Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA !Received 21 February 2008; revise...

Shot noise and multiple Andreev reflections in d-wave superconductors.

We present a theoretical analysis of the shot noise in d-wave/d-wave contacts with arbitrary transparency, including the contribution of multiple Andreev reflections. The multiple charge quanta transferred in these processes are revealed as a huge enhancement of the noise-current ratio at low voltages, which survives for all crystal misorientations. We also show how different ingredients such a...