korean english


Home > 게시판 > 세미나

Seminar <6/19> 초전도 특별세미나

2012.06.11 17:02

관리자 조회 수:80950

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


번호 제목 날짜 조회 수
공지 2022학년도 1학기 콜로퀴움 일정 2022.01.10 28137
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 974780
160 <May.22(Wed.)> Introduction to exotic quantum states in solids 2019.05.15 58047
159 <Oct.2(Wed.)> Fundamental physics with high-energy atmospheric and cosmic neutrinos today and in the future 2019.09.26 57976
158 <4/29(수) 오후4:30분> 양자정보 2015.04.23 57921
157 <2/17(Mon.)> Magneto-optical study of the Dirac semimetal Cd3As2 in Voigt geometry 2020.02.11 57789
156 <April.4(Wed.) 4:30 PM>From Static to Dynamic Multiferroics 2018.03.29 57647
155 <11/5(Thu.)> Higher Spin Cooper Pairs 2020.10.27 57518
154 <Mar.13(Wed.)> Physics in Medicine: Magnetic Resonance Imaging 2019.03.07 57112
153 <10/31(금)> The dynamics of composite pseudo-Goldstone Higgses 2014.10.27 57011
152 <5/13(수) 오후4:30분> 내가 몰랐던 대한민국 2015.05.07 56921
151 <9/23(화)> Novel resistive switching behavior of ferroelectric nanodevices file 2014.09.03 56915
150 <Oct. 5(Wed.) 4:30 PM> 국제원자력기구 (IAEA)와 핵데이터 2016.09.22 56714
149 <June 14(Wed.) 4:30 PM> Stellar core collapse: success or failure, and future probes 2017.06.08 56530
148 <8/30(Fri) 16:00 ~ >Structures of light neutron-rich nuclei, 17,19C 2019.08.22 56525
147 <Nov.20(Wed.)>At the End of Space and Time: Imaging the Black Hole in M 87 2019.11.14 56467
146 <Oct. 19(Wed.) 10:00 AM> Hyper-Kamiokande project -The future of neutrino physics in Japan 2016.10.12 56248
145 <4/24(금)> 초청세미나 개최 안내 file 2015.04.13 56103
144 <Nov. 16(Wed.) 4:30 PM> Two-dimensional Chiral Materials and Topological Insulators 2016.11.10 55698
143 <Nov.14(Wed.) 4:30 PM> Status and Prospects for the IceCube Neutrino Observatory 2018.11.07 55638
142 <3/11(Mon) 10:30 am ~ >Probing Dark Matter at LIGO and Beyond 2019.03.04 55627
141 <3/16(월)> 초청세미나 개최 안내 2015.02.27 55604