visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-05-24 16:00 
연사  
장소 E6-2. #1323(1st fl.) 

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 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
586 2025-03-24 16:00  전응진 박사 (KIAS)  After the Higgs discovery file
585 2017-12-13 13:30    KAIST-KIAS Joint Workshop in Theoretical Sciences 개최 file
584 2019-05-21 16:00    Classification of flat bands according to the band-crossing singularity of Bloch wave functions file
583 2019-09-02 16:00    Fall 2019: Physics Colloquium file
582 2023-05-26 11:00    (응집물리 세미나)Spectral Analyses of Stochastic Charge Trapping in Oxide Heterostructures file
581 2023-05-19 11:00    (응집물리 세미나)Dipole condensations in Tilted Bose-Hubbard Chains
580 2015-10-14 18:00    인터스텔라 영화 속의 물리 file
579 2022-03-28 16:00    Ultimate-density atomic semiconductor via flat bands
578 2025-07-16 14:00  이준현 박사 (Staff Engineer, Samsung Research)  Scaling Laws and Transformers: Modern LLMs for the Physicist’s Mind file
577 2009-09-07 16:00    Physics Colloquium : 2009 Fall file
576 2018-11-08 16:00    Conformality lost file
575 2017-03-06 16:00    Spring 2017: Physics Colloquium file
574 2014-05-28 17:00    부품소재산업이 미래다
573 2022-11-25 11:00    [Update 세미나영상](응집물리 세미나) DMFT+ NRG: From models to real materials, from local to nonlocal correlations file
572 2022-03-21 16:00    Multi-wavelength Studies on Relativistic Jets from Gamma-ray Bright Active Galactic Nuclei
571 2023-03-16 16:00    (광학분야 세미나) Investigation of 3D cell mechanics using refractive-index tomography
570 2024-10-17 16:00    Photonic Methods for Quantum Levitodynamics Beyond the Rayleigh Regime
569 2018-08-01 11:00    Future of AI: Is the brain a computer? file
568 2022-09-23 11:00    [Update 세미나 영상] (응집물리 세미나) Steady Floquet-Andreev states in graphene Josephson junctions file
567 2020-09-11 14:00    SRC Seminar file