Special Seminar by Prof. Sonia Haddad

EPSL | 2012.06.11 20:06 | 조회 5453
1. Date: 2012년 6월 19일(화) 11:00 ~ 12:00 

2. Place: Presentation Room in Samsung Library (2nd floor on the north side)

3. Speaker: Prof. S. Haddad (Faculté des Sciences de Tunis)

4. Title: Inhomogeneous organic superconductors: role of disorder and magnetic field 

5. Abstract

Several experimental studies in low dimensional organic superconductors have given evidence for a phase  segregated state where superconducting coexist with and non superconducting domains. The superconducting properties are found to be strongly dependent on the amount of disorder introduced in the sample regardless its origin. The suppression of the superconducting transition temperature Tc shows clear discrepancy with the result expected from the Abrikosov-Gor’kov law giving the behavior of Tc with impurities. Based on the time dependent Ginzburg-Landau theory, we derive a model to account for the striking feature of Tc in organic superconductors for different types of disorder by considering the segregated texture of the system. We also address the possibility of enhanced upper critical field and Nernst signal in a stack of superconducting slabs alternating with nonsuperconducting domains. This enhancement is ascribed to the superconducting fluctuations which become more important as the dimensionality of the system is reduced. We derive, as a function of the superconducting slab thickness L, the upper critical field Hc2 along the slabs and the Peltier coefficient on which depends the Nernst signal. We show that Hc2 exhibits an upward curvature in the two dimensional (2D) limit where the interplane coherence length ξ is smaller than the superlattice periodicity D = L+d, d being the size of the nonsuperconducting domain. In this limit, Nernst signal is found to be strongly enhanced compared to the 3D case. The results are discussed in connection with experimental observations in quasi-1D organic superconductors and superlattices of high-Tc films.

twitter facebook me2day 요즘
40개(2/2페이지)
NOTICE
번호 제목 글쓴이 조회 날짜
공지 [Special seminar] Dr. Eun-Mi Choi CQMS 7125 2019.08.13 13:58
공지 [CQMS End of Year Party] CQMS 11550 2017.12.30 14:13
18 The International Conference on STRONGLY 첨부파일 이상연 7729 2013.02.15 11:02
17 10th Superconductivity Foundation Course 사진 첨부파일 이상연 7609 2013.02.15 10:59
16 Sangyun, Soohyeon and Dongwon`s Poster A 사진 첨부파일 이상연 8424 2012.11.01 10:19
15 KPS 가을학술논문 발표회 (10/24~10/26) EPSL 6928 2012.09.22 13:09
14 Sangyun's article published in Physics & EPSL 5581 2012.09.13 16:11
13 Eunsung's paper published in Applied Phy EPSL 5352 2012.07.25 16:20
12 Soonbeom's First Paper Published in Phys EPSL 5463 2012.06.20 10:47
11 ICHN2012 - International Conference on H EPSL 6882 2012.06.11 20:12
>> Special Seminar by Prof. Sonia Haddad EPSL 5454 2012.06.11 20:06
9 Job Openings for CQMS EPSL 13902 2012.05.31 14:03
8 2012 BK 석학 초청 특별 강연 - Prof Greg Stewart EPSL 6219 2012.05.16 20:00
7 Awards in KPS 2011 Fall Meeting EPSL 5619 2012.04.02 13:18
6 2011 초전도 100주년 기념 논문 선정 EPSL 5897 2012.04.02 13:16
5 Solly won the best presentation award in EPSL 5036 2012.04.02 13:15
4 EPSL Paper Featured as Cover Page for Ph EPSL 5512 2012.04.02 13:14
3 Prof. Park Awarded POSCO Science Fellow EPSL 6304 2012.04.02 13:13
2 2008 JPCM Top Paper 선정 EPSL 5497 2012.04.02 13:12
1 Notice 게시판이 리뉴얼 되었습니다. EPSL 5342 2012.02.28 16:11