visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-05-24 16:00 
일시 May 24 (Tue) 4 PM 
장소 E6-2. #1323(1st fl.) 
연사 Dr. Euyheon Hwang, SKKU Advanced Institute of Nanotechnology, Sung Kyung Kwan University 

Electronic and magnetic properties of 2D transition-metal thiophosphates and tunability of magnetic order with carrier density

 

May 24 (Tue) 4 PM, E6-2. #1323(1st fl.)
Dr. Euyheon Hwang, SKKU Advanced Institute of Nanotechnology, Sung Kyung Kwan University

 

We present the electronic and magnetic properties of two dimensional (2D) MPX3 (M= transition metal, and X = S, Se, Te) transition metal thiophosphates. The MPX3 are layered van der Waals materials and exhibit novel magnetic order as a single layer. Our calculations of the magnetic ground states in MPX3 single layer compounds predict semiconducting phases with variable band gap sizes down to metallic phases depending on their magnetic orders. A systematic trend of decreasing band gaps in antiferromagnetic states is observed as the chalcogen atoms S, Se, and Te change from smaller to larger atomic number, whereas diverse ground-state phases, e.g., ferromagnetic, antiferromagnetic, and nonmagnetic phases can be expected for different compounds which are accompanied by variations in the lattice constants, and non-negligible distortions in crystal symmetries. In addition, the antiferromagnetic semiconductors of MPX3 single layer show the transition to the ferromagnetic halfmetals with both electron and hole doping, which can be controlled by applying an external gate voltage in the MPX3 field effect transistors (FET). We find that the itinerant d electrons in transition metals induce the ferromagnetic to antiferromagnetic transition accompanied by the metal to semiconductor transition. The sensitive interdependence between the magnetic, structural, and electronic properties suggest important potential of 2D magnetic van der Waals materials for strain and field-effect carrier tunable spintronics.

 

Contact: Sungjae Cho, Physics Dept., (sungjae.cho@kaist.ac.kr)

번호 날짜 장소 제목
공지 2022-11-25 11:00  E6-2 #1323  [Update 세미나영상](응집물리 세미나) DMFT+ NRG: From models to real materials, from local to nonlocal correlations
160 2016-05-13 16:00  E6. #1501(1st fl.)  Graphene analogue in (111)- BaBiO3 bilayer heterostructures for topological electronics
159 2016-05-13 13:30  E6. #1501(1st fl.)  Aperiodic crystals in low dimensions
158 2016-05-16 16:00  #1323(E6-2, 1st Fl.)  Tuning microwave cavities with biased nonlinear dielectrics for axion searches
157 2016-05-19 16:00  #1323(E6-2, 1st fl.)  Nonlinear/quantum optical effect in silicon nano-photonics
156 2016-05-19 15:00  May 19, 2016 (Thur.) 3PM,  The CERN Resonant WISP Search: Development, Results and Lesson-Learned
155 2019-05-02 16:00  #1323, E6-2  Anomalous optical properties of halide perovskites file
154 2019-05-21 16:00  #5318, E6-2  Classification of flat bands according to the band-crossing singularity of Bloch wave functions file
153 2019-05-24 16:00  #1323, E6-2  Infrared spectroscopy study on metal-insulator transitions in layered perovskite iridates file
» 2016-05-24 16:00  E6-2. #1323(1st fl.)  Electronic and magnetic properties of 2D transition-metal thiophosphates and tunability of magnetic order with carrier density
151 2022-05-27 11:00  Online seminar  Current Status and Future Plans of ADMX file
150 2018-05-29 16:00  #1323, E6-2  Investigation on metal nanostructure/semiconductor junction and its applications file
149 2019-05-30 16:00  #1323, E6-2  Tuning the excitonic properties of semiconductors with light-matter interactions file
148 2019-05-31 11:00  #1323, E6-2  Cavity QED with Spin Qubits file
147 2016-05-31 16:00  #1323(E6-2, 1st fl.)  Understanding 3D tokamak physics towards advanced control of toroidal plasma
146 2018-05-31 16:00  #1323, E6-2  Dynamic control of optical properties with gated-graphene metamaterials file
145 2019-05-08 16:00  E6 Room(#1323)  Imaging valley dependent electron transport in 2D semiconductors file
144 2019-05-09 16:00  #1323, E6-2  Quantum Optical Sensing Using Single Photons And Single Photon Emission from Single Emitters file
143 2019-05-09 16:00  #1323, E6-2  Quantum Optical Sensing Using Single Photons And Single Photon Emission from Single Emitters file
142 2018-05-09 16:00  #1323, E6-2  Recent advances in thermoelectric bulk composites file
141 2018-05-11 14:30  E6-2. 1st fl. #1323  Disordered Floquet topological insulators file