logo

korean english

게시판

Home > 게시판 > 세미나

Seminar <6/19> 초전도 특별세미나

2012.06.11 17:02

관리자 조회 수:87837

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 1031219
222 <8/17> Is Quantum Criticality a Key to Unconventional Superconductivity? 2006.08.09 86272
221 <3/26> Shedding infrared light on high-Tc superconductors 2014.03.19 86357
220 <4/16>같은 곳을 바라보는 다른 시선 2010.04.09 86387
219 <10/8(수> Astrophysical probes of Dark Matter, the case of the Milky Way 2014.10.01 86454
218 <1/14>Dark Matter signals from PAMELA and ATIC 2009.01.12 86467
217 <5/12> An Infrared View of the Universe 2006.05.09 86537
216 <12/21(Fri) 3:00pm ~ > Quasilocal Smarr Relations / Expanding Universe and Dynamical Compactification Using Yang-Mills Instantons 2018.12.17 86569
215 <2/15> Perturbation during Inflation 2011.02.11 86893
214 <9/26(Thu.) 4:30 pm ~ > Neutrino Physics and Dark Matter search in IBS 2019.09.24 86961
213 <11/4>Plasmonic Properites of Metallic Nanostructures 2009.10.30 86991
212 <11/11> Revealing magnetism of nanoislands with quantitative insights into spin-polarized scanning tunneling spectroscopy 2013.11.05 87170
211 <11/20> Particle Accelerators: Driving Forces for Energy 2009.11.16 87240
210 <9/19> Novel mechanical degree of freedom at nanoscales 2012.09.13 87325
209 <10/9> Smearing effect of membrane in plane-wave matrix model 2009.10.05 87428
208 <5/16(Thu.) 14:00 ~ >The Chiral anomaly without Landau levels 2019.05.08 87438
207 2007학년도 2학기 콜로키엄 schedule 안내 2007.09.27 87520
206 <2/11>Marginal Deformations For Lower Dimensional D-bran... 2008.02.05 87586
205 <12/7>유럽입자물리연구소에서의 CMS 실험 2007.12.03 87819
» <6/19> 초전도 특별세미나 2012.06.11 87837
203 <6/12> Latest Results from the IceCube Neutrino Observatory 2013.06.07 87940