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Josephson effect in ferromagnetic d-wave superconductor/ferromagnet/ferromagnetic d-wave superconductor junctions
磁性d波超导/铁磁/磁性d波超导结中的约瑟夫森效应

Jin Xia,Dong Zheng-Chao,Liang Zhi-Peng,Zhong Chong-Gui,
金霞
,董正超,梁志鹏,仲崇贵

物理学报 , 2013,
Abstract: By solving a self-consistent equation for the ferromagnetic d-wave superconducting gap and the exchange energy, we study the Josephson current in the ferromagnetic d-wave superconductor/ferromagnet/ferromagnetic d-wave superconductor junctions. In the Josephson critical current, there are two oscillation components with different periods. It is found that the short-period component can be separated from the long-period one by increasing the exchange energy in ferromagnet and the barrier strength at the ferromagnet/ferromagnetic d-wave superconductor interface, and vice versa. Under a certain thickness for the ferromagnet, exchange energy for the ferromagnetic d-wave superconductor may increase the critical current in the case of a parallel alignment of the magnetization in the ferromagnetic d-wave superconductor.
Shot noise in the semiconductor/ferromagnetic d-wave superconductor tunnel junction
半导体/磁性d波超导隧道结中的散粒噪声

Liang Zhi-Peng,Dong Zheng-Chao,
梁志鹏
,董正超

物理学报 , 2010,
Abstract: Considering the dependence of the gap on the exchange energy in ferromagnetic d-wave superconductor, we use an extended Blonder-Tinkham-Klapwijk approach to investigate the shot noise in semiconductor/ferromagnetic d-wave superconductor junction by solving the Bogoliubov-de Gennes( BdG) equation. It is shown that the exchange energy h_0 in the ferromagnetic d-wave superconductor may induce a split of the shot noise double-peak at zero-bias and the energy gap peak, and the interval between the two split peaks is equal to 2h_0; furthermore, with the increasing exchange energy h_0 , the shot noise and the ratio of shot noise power to average current are restrained.
THE PROPERTIES OF THE ANDREEV REFLECTION IN FERROMAGNET-INSULATOR-d WAVE SUPERCONDUCTOR JUNCTION
铁磁-绝缘层-d波超导结中的Andreev反射特性

DONG ZHENG-CHAO,CHEN GUI-BIN,XING DING-YU,DONG JIN-MING,
董正超
,陈贵宾,邢定钰,董锦明

物理学报 , 2000,
Abstract: Taking into account the exchange interaction in the ferromagnet and the interface scattering effect, within Blonder-Tinkham-Klapwijk scattering formalism, we have calculated the quasiparticle transport coefficients and the tunneling spectrum in the ferromagnet-insulator-d wave superconductor junction. It is found that the ferromagnetic exchange interaction can suppress the Andreev reflection, and consequently the Andreev reflected quasiparticle shows an evanescent-wave behavior depending on the injection angle of the quasiparticle. The tunneling spectrum exhibits some novel features.
STRUCTURE OF SINGLE VORTEX IN A s+id WAVE SUPERCONDUCTOR
s+id波高温超导体的单根涡旋线结构

NIU JIN-HAI,ZHOU SHI-PING,XU KE-XI,
牛金海
,周世平,徐克西

物理学报 , 1998,
Abstract: The structure of a single vortex in a superconductor with s+id symmetry is given employing a recently developed Ginzburg-Landau theory by the method of relaxation iteration.We also studied the variation of respective components s and d with the temperature and magnetic field.Finally,we give the curve of the upper critical field along with transition temperature in mixed wave consideration.Our result is in qualitative agreement with the experiment data.
SOFT PHONON AND ITS RAMAN SCATTERING IN A CHARGE-DENSITY-WAVE SUPERCONDUCTOR
电荷密度波超导体中的软声子和喇曼散射

LEI XIAO-LIN,
雷啸霖

物理学报 , 1983,
Abstract: 基于Balseiro和Falicov的概念,我们用一个简单模型计算了电荷密度波(CDW)与超导共存系统中被电声子相互作用重整化的CDW振幅模式的谱函数A(ω),所得的A(ω)在ω≤2G(G为CDW带隙)区域有一个权重相当大的δ函数型的峰,而在ω>2(G2十△2)1/2(△为超导能隙)区域是比较宽的连续谱,固定G,当△减少时峰的强度显著降低,但其位置仅有较小的变化;与此同时连续谱的权重增加,这些特点与Sooryakumar和Klein在电荷密度波超导体2H-Nbse2中发现的喇曼出线的能隙模式的行为是一致的。
Tunneling conductance in quantum-wire/insulator/p wave superconductor junction
量子线/绝缘层/p波超导体结的隧道谱

Li Xiao-Wei,
李晓薇

物理学报 , 2007,
Abstract: 用Bogoliubov-de Gennes方程来研究量子线/绝缘层/p波超导体结(q/I/p)中的准粒子输运过程,利用推广的Blonder,Tinkham和Klapwijk模型计算绝对零度和有限温度下q/I/p的一级谐波隧道谱.和量子线/绝缘层/d波超导体结的一级谐波隧道谱不同的是q/I/p的一级谐波隧道谱中存在零偏压电导峰.随着q/I/p中绝缘层的势垒散射增强,q/I/p的一级谐波隧道谱中零偏压电导峰变高.
Spin-polarized transport in ferromagnetic semiconductor/ferromagnetic d-wave superconductor tunnel junction
磁性半导体/磁性d波超导结中的自旋极化输运

Dong Zheng-Chao,
董正超

物理学报 , 2008,
Abstract: 通过求解磁性d波超导中的能隙与磁交换能的自恰方程,利用推广的Blonder-Tinkham-Klapwijk理论研究磁性半导体/磁性d波超导结中自旋极化准粒子输运系数与微分电导.计算表明:1)磁性d波超导结中的磁交换能h0可导致零偏压电导峰与能隙电导峰劈裂,劈裂的宽度为2h0;2)磁性半导体中的磁交换能hFS可使零偏压电导峰劈裂的峰值变低.而由能隙电导峰劈裂的两个子峰,当两种磁性材料的磁化方向平行时,右边的峰值随着hFS的变大而变高,左边的峰值变低,当两磁性材料的磁化方向反平行时,随hFS变大右边的峰值变低,左边的峰值变高.
The dc Josephson current in superconductor-ferromagnet/insulator/spin-triplet p-wave superconductor junctions
铁磁超导态/绝缘层/自旋三重态p波超导体结的直流Josephson电流

Li Xiao-Wei,
李晓薇

物理学报 , 2006,
Abstract: 由Bogoliubov-de Gennes方程得到铁磁超导共存态(FS)的自洽方程,利用推广的Furusaki-Tsukada的电流公式计算了铁磁超导态/绝缘层/自旋三重态p波超导体(FS/I/p)结的直流Josephson电流随结的温度、相位差以及FS中磁交换能、结界面的势垒散射强度的变化关系.研究表明:FS中磁交换能、结界面的势垒散射均抑制FS/I/p结的直流Josephson电流.当自旋三重态超导体具有px波配对势时,自旋三重态超导体结的直流Josephson电流随结两侧相位差的振荡周期是π.
Electromagnetic wave scattering by a superconductor  [PDF]
Miguel C. N. Fiolhais,Hanno Essén
Physics , 2012, DOI: 10.1209/0295-5075/97/44006
Abstract: The interaction between radiation and superconductors is explored in this paper. In particular, the calculation of a plane standing wave scattered by an infinite cylindrical superconductor is performed by solving the Helmholtz equation in cylindrical coordinates. Numerical results computed up to $\mathcal{O}(77)$ of Bessel functions are presented for different wavelengths showing the appearance of a diffraction pattern.
TUNNELING SPECTRUM OF MIXED d(x2-y2)+idxy WAVE NORMAL METAL/INSULATOR/SUPERCONDUCTOR JUNCTIONS
d(x2-y2)+idxy混合波正常金属/绝缘层/超导体结中的隧道谱

LI XIAO-WEI,DONG ZHENG-CHAO,
李晓薇
,董正超

物理学报 , 2001,
Abstract: According to the Blonder-Tinkham-Klapwijk approach,we calculate the electron transport coefficients through a junction of a mixed d(x2-y2)+idxy wave superconductor and a normal metal with a rough interface. We investigate the effects of rough strength of the interface and the mixing of the two symmetries on electron tunneling.It is found that the tunneling spectrum depends strongly on the relative strength of the two components. The zero-bias conductance peak splits into two peaks due to the mixing.
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