logo

korean english

게시판

Home > 게시판 > 세미나

Seminar <6/19> 초전도 특별세미나

2012.06.11 17:02

관리자 조회 수:97795

Faculté des Sciences de Tunis의 S. Haddad 교수님을 초빙하여 아래와 같이 특별세미나를 개최합니다.

학과 구성원 여러분의 많은 참석을 부탁 드립니다.

 

         아             래

 

     1. 일시: 2012년 6월 19일(화) 11:00 ~ 12:00 

 

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

 

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

 

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

 

     5. 초록: 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.

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1078852
136 <7월27일>Correlated topological phases in 3D complex oxides via Green's functions 2012.07.27 88847
135 <6/21> Nuclear Astrophysics in Effective Field Theories 2012.06.20 88457
134 <6/19> Kohn's theorem and non-relativistic symmetry 2012.06.15 88674
» <6/19> 초전도 특별세미나 2012.06.11 97795
132 <6/5> Bilinear Wess-Zumino term for open AdS superstring: covariant description of D-branes 2012.06.04 100677
131 <5/22> Vortex partition function and 3d dualities 2012.05.21 69094
130 <6/5> BK 석학초청 특별강연 - How Well Does High Field Specific Heat Probe the Nodal Nature of the Multi- 2012.05.14 97006
129 <5/16> superconformal index with line operators and domain walls 2012.05.14 92956
128 <5/9> Gravity dual of (Non-)Fermi Liquids from Entanglement Entropy 2012.05.07 80156
127 <5/8> A brief introduction to holographic entanglement entropy 2012.05.07 77085
126 <5/3> APOLLO Program: Understanding Neutron-Rich Nuclei for r-Process Nucleosynthesis 2012.05.03 90236
125 <5/1> Supersymmetry Breaking in Chern-Simons-matter Theories 2012.04.30 73226
124 <4/24> How to introduce the monopole in quantum mechanics? 2012.04.23 74400
123 <4/18> Action-angle variables for the near-horizon extreme black hole particle dynamics 2012.04.17 111410
122 <4/23> BK 석학초청 특별강연 - Connections between Stellar Evolution and Nuclear Physics 2012.04.16 77843
121 <4/6> Observation of Reactor Electron Antineutrino Disappearance in the RENO Experiment 2012.04.04 75005
120 <3/14> Proto-neutron star 2012.03.08 68361
119 <3/22> 석학초청 특별강연 – Pyeongyang Advances Its Nuclear Program 2012.03.07 67359
118 BK 석학초청 특별세미나 - Frustration and dimensional reduction in multi-orbital systems 2011.10.28 252855
117 <11/3> Special Seminar - "2011 Nobel Physics: The beginning and the end of the universe" 2011.10.27 81618