Journal Club Presentations in 2016

2016

Dec 22 (Thu)

• • Speaker : Suik Cheon

  • Place & Time : Sci. Bldg 3-201, 4:00pm

           Niklas Roschewky, Tomoya Matsumura, Suraj Cheema, Frances Hellman, Takeshi Kato, Satoshi Iwata, and Sayeef Salahuddin          

           Spin-orbit torques in ferrimagnetic GdFeCo alloys

           Appl. Phys. Lett. 109, 112403 (2016)

Dec 9 (Fri)

• • Speaker : Dongwook Go

• Place & Time: Sci. Bldg 3-201, 11:00 a.m.

• Raffaello Bianco and Raffaele Resta

• Mapping topological order in coordinate space

• Physical Review B 84, 241106(R) (2011)

           Raffaello Bianco and Raffaele Resta

           Orbital magnetization as a local property

           Physical Review Letters 110, 087202 (2013)

Nov 17 (Thu)

• • Speaker : SeungJu Shin

• Place & Time: Sci. Bldg 3-201, 4:00pm

• D. MacNeill, G.M. Stiehl, M. H. D. Guimaraes, R. A. Buhrman, J. Park and D. C. Ralph

• Control of spin-orbit torques through crystal symmetry in WTe2/Ferromagnet bilayers

• Nature Physics (2016)

Nov 3 (Thu)

• Speaker : Sang-Chan Lee

• Place & Time: Sci. Bldg 3-201, 4:00pm

Finite-Element Theory of Transport in Ferromagnet–Normal Metal Systems 

Arne Brataas, Yu. V. Nazarov, and Gerrit E. W. Bauer 

Phys. Rev. Lett. 84, 2481 – Published 13 March 2000

Oct 13 (Thu)

• • Speaker : Mijin Lim

• Place & Time: Sci. Bldg 3-201, 4:00pm

• Yi Liu, Zhe Yuan, R. J. H. Wesselink, Anton A. Starikov, and Paul J. Kelly

• Interface Enhancement of Gilbert Damping from First Principles

• Phys. Rev. Lett. 113, 207202 (2014)

Sep 22 (Thu)

• • Speaker : Kyung-Han Kim

• Place & Time: Sci. Bldg 3-317A, 4:00 p.m.

• J. Li, L. R. Shelford, P. Shafer, A. Tan, J. X. Deng, P. S. Keatley, C. Hwang, E. Arenholz, G. van der Laan, R. J. Hicken, and Z. Q. Qiu

• Direct Detection of Pure ac Spin Current by X-Ray Pump-Probe Measurements

• Phys. Rev. Lett. 117, 076602 (2016)

Sep 8 (Thu)

• • Speaker : Junghun Son

• Place & Time: 3-201, 16:00

 Reciprocal control of spin-orbital in surface state

Sep 2 (Fri)

• • Speaker : Dongwook Go

• Place & Time: 3-201, 16:00 ~ 

Modern theory of orbital magnetization: history and recent advances

References: 

[1] D. Xiao, J. Shi, and Q. Niu, Phys. Rev. Lett. 95, 137204 (2005):

      Berry Phase Correction to Electron Density of States in Solids.

[2] T. Thonhauser, D. Ceresoli, D. Vanderbilt, and R. Resta, Phys. Rev. Lett. 95, 137205 (2005):

      Orbital Magnetization in Periodic Insulators.

[3] D. Ceresoli, T. Thonhauser, D. Vanderbilt, and R. Resta, Phys. Rev. B 74, 024408 (2006):

      Orbital magnetization in crystalline solids: Multi-band insulators, Chern insulators, and metals.

[4] J. Shi, G. Vignale, D. Xiao, and Q. Niu, Phys. Rev. Lett. 99, 197202 (2007):

      Quantum Theory of Orbital Magnetization and Its Generalization to Interacting Systems.

[5] D. Ceresoli, U. Gerstmann, A. P. Seitsonen, and F. Mauri, Phys. Rev. B 81, 060409(R)  (2010):

      First-principles theory of orbital magnetization.

[6] T. Thonhauser, Int. Mod. Phys. B 25, 1429 (2011):

      Theory of Orbital Magnetization in Solids.

[7] M. G. Lopez, D. Vanderbilt, T. Thonhauser, and I. Souza, Phys. Rev. B 85, 014435 (2012):

      Wannier-based calculation of the orbital magnetization in crystals.

[8] J.-P. Hanke, F. Freimuth, A. K. Nandy, H. Zhang, S. Blügel, Y. Mokrousov, arXiv:1603.07683:

      The crucial role of the modern theory for describing orbital magnetism:

      from magnetic heterostructures to topological orbital ferromagnets.

[9] D. Go, J.-P. Hanke, P. M. Buhl, F. Freimuth, G. Bihlmayer, H.-W. Lee, Y. Mokrousov, and S. Blügel, in preparation:

      Surface orbitronics: new twits from orbital Rasha physics.

Aug 9 (Tue): Public Talk (POSTECH Tech. Review)

• • Speaker: Dongwook Go

• Place & Time: 10:30 p.m, AGIT, Hyoja-dong market

• 기초 물리학과 기술의 융합: 스핀트로닉스

• * slide link

Aug 4 (Thu)

• • Speaker : Suik Cheon

• Place & Time : Sci. Bldg 3-201, 4:00pm

       V. Simonet, M. Loire, and R. Ballou 

       Magnetic chirality as probed by neutron scattering

       Eur. Phys. J. Special Topics 213, 5–36 (2012) 

       K. Marty, V. Simonet, E. Ressouche, R. Ballou, P. Lejay, and P. Bordet

       Single Domain Magnetic Helicity and Triangular Chirality in Structurally Enantiopure Ba3NbFe3Si2O14

       Phy. Rev. Lett. 101, 247201 (2008)

       C. Stock, L. C. Chapon, A. Schneidewind, Y. Su, P. G. Radcelli, D. F. McMorrow, A. Bombardi, N. Lee, and S.-W. Cheong

       Helical spin waves, magnetic order, and fluctuations in the langasite compound Ba3NbFe3Si2O14

       Phy. Rev. B. 83, 104426 (2011)

       Jens Jensen

       Chiral spin-wave excitations of the spin-5/2 trimers in the langasite compound Ba3NbFe3Si2O14

       Phy. Rev. B. 84, 104405 (2011)

July 28 (Thu)

• • Speaker : SeungJu Shin

• Place & Time: Sci. Bldg 3-201, 4:00pm

• Yabin Fan, Xufeng Kou, Pramey Upadhyaya, Qiming Shao, Lei Pan, Murong Lang, Xiaoyu Che, Jianshi Tang, Mohammad Montazeri, Koichi Murata, Li-Te Chang, Mustafa Akyol, Guoqiang Yu, Tianxiao Nie, Kin L. Wong, Jun Liu, Yong Wang, Yaroslav Tserkovnyak and Kang L. Wang

• Electric-field control of spin-orbit torque in a magnetically doped topological insulator

• Nature Nanotechnology 11, 352-359 (2016)

July 20 (Thu)

• • Speaker : Sang-Chan Lee

• Place & Time: Sci. Bldg 3-331, 3:00pm

Katsuhisa Taguchi, Tatsushi Imaeda, Masatoshi Sato, and Yukio Tanaka

Photovoltaic chiral magnetic effect in Weyl semimetals

Phys. Rev. B 93, 201202(R) – Published 12 May 2016

June 23 (Thu)

• • Speaker : Kyung-Han Kim

• Place & Time: Sci. Bldg 3-115, 4:00 p.m.

• Ji Hoon Ryoo and Cheol-Hwan Park

• Spin-conserving and reversing photoemission from the surface states of Bi2Se3 and Au (111)

• Phys. Rev. B 93, 085419 (2016)

May 19 (Thu)

• • Speaker : Suik Cheon

• Place & Time: Sci. Bldg 3-201, 5:00pm

• Ran Cheng, Matthew W. Daniels, Jian-Gang Zhu, and Di Xiao

• Ultrafast switching of antiferromagnets via spin-transfer torque

• Physical Review B 91, 064423 (2015)

May 12 (Thu)

• • Speaker : SeungJu Shin

• Place & Time: Sci. Bldg 3-201, 5:00pm

• Kevin Gareelo, Loan Mihai Miron, Can Onur Avci, Frank Freimuth, Yriy Mokrousov, Stefan Blugel, Stephane Auffret, Olivier Boulle, Gilles Gaudin and Pietro Gambardella

• Symmetry and magnitude of spin-orbit torques in ferromagnetic heterostructures

• Nature Nanotechnology 8, 587-593 (2013)

April 7 (Thu)

• • Speaker : Sang-Chan Lee

• Place & Time: Sci. Bldg. 3-201, 5:00 pm

• Rundong Li, Jing Wang, Xiao-Liang Qi, and Shou-Cheng Zhang

• Dynamical axion field in topological magnetic insulators

• Nature Physics 6, 284 - 288 (2010)

March 17 (Thu)

• • Speaker : Kyung-Han Kim

• Place & Time: Sci. Bldg. 3-201, 5:00 p.m.  

          Xiao-Qin Yu, Zhen-Gang Zhu, Gang Su, and A.-P. Jauho

          Thermally Driven Pure Spin and Valley Currents via the Anomalous Nernst Effect in Monolayer Group-VI Dichalcogenides

          Phys. Rev. Lett. 115, 246601 (2015)

March 10 (Thu)

• • Speaker : Suik Cheon

• Place & Time: Sci. Bldg 3-201A, 5:00pm

• H. Reichlová, D. Kriegner, V. Holý, K. Olejník, V. Novák, M. Yamada, K. Miura, S. Ogawa, H. Takahashi, T. Jungwirth, and J. Wunderlich

• Current-induced torques in structures with ultrathin IrMn antiferromagnets

• Physical Review B 92, 165424(2015)

February 18 (Thu)

• • Speaker : SeungJu Shin

• Place & Time: Sci. Bldg 3-201, 4:00pm  

          R. Chisnell, J. S. Helton, ..., D. G. Nocera, and Y. S. Lee

          Topological Magnon Bands in a Kagome Lattice Ferromagnet     

          Physical Review Letters 115, 147201 (2015) 

February 12 (Fri)

• • Speaker : Dongwook Go

• Place & Time: Sci. Bldg. 3-317A, 2:00 PM

• Proposal rehearsal (Global PhD Fellowship)

February 4 (Thu) - 5 (Fri) - BK21Plus Young Physicists Workshop

January 21 (Thu)

• • Speaker : Dongwook Go

• Place & Time: Sci. Bldg. 3-201, 2:00 PM

          Colloquium:

          Exploring atomic orbitals in condensed matter - a unified picture on spin-orbit driven physics

January 14 (Thu)

• • Speaker : Sang-Chan Lee

• Place & Time: Sci. Bldg. 3-317A, 4:00pm

• S. M. Young and C. L. Kane

• Dirac semimetals in two dimensions

• Physical Review Letters 115, 126803 (2015)