Two faces of a double well: Multifunctional device based on Ti2O monolayer and magneto-mechanical switch based on MXene nanotube
Апстракт
The presentation will consist of two parts. In the first part a new concept of multifunctional
nanodevices as potential replacements for common transistors will be presented and a Ti 2 O
monolayer as an example of such a nanodevice will be discussed. Our study based on density
functional theory indicates that a Ti 2O layer is bistable for two lattice parameters, being
metallic for one and semiconducting for another parameter. In a switching configuration, this
provides a high current ON/OFF ratio when the layer is biased and stretched simultaneously.
The high sensitivity of conductance to layer stretching can be utilized for electromechanical
switching, the bistability may provide a potential for application as a nonvolatile memory bit,
while the current-voltage characteristic of the material in its semiconducting phase indicates a
possible use as a varistor. The second part of the presentation will be about structural and
magnetic properties of MXene nanotubes. Our density f...unctional theory-based study predicts
the existence of two mutually transformable polymorphs of Mo2C nanotubes with strikingly
different properties. One polymorph exhibits unusual negative strain energy with respect to the
planar Mo2C structure and the absence of any long-range magnetic order. The second
polymorph displays an antiskyrmionic spin texture with a net magnetization along the tube’s
axis. The two nanotube polymorphs may be converted into each other by axial tensile or
compressive strains, allowing for their application as a magneto-mechanical switch and
eventually a nonvolatile magnetic memory unit.
Кључне речи:
Density functional theory / Electronic properties / Transport properties / Magnetic properties / Titanium oxide / MXene / Nanotube / Quantum simulationsИзвор:
Tnano20: International Workshop on Nanotechnology, Book of abstracts, 2020, 24 / I11-Издавач:
- Tbilisi, Gruzija
Напомена:
- Predavanje po pozivu Igora Popova na konferenciji Tnano20 odrzanog u Tbilisiju, Gruzija (online zbog COVID pandemije) u oktobru 2020. godine. Link na sajt konferencije: https://nanoten.com/conf-org/Tnano20 Link na knjigu abstrakta: https://nanoten.com/conf-org/Tnano20/Tnano20-abstract-book.pdf
Институција/група
Institut za multidisciplinarna istraživanjaTY - CONF AU - Popov, Igor PY - 2020 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/2325 AB - The presentation will consist of two parts. In the first part a new concept of multifunctional nanodevices as potential replacements for common transistors will be presented and a Ti 2 O monolayer as an example of such a nanodevice will be discussed. Our study based on density functional theory indicates that a Ti 2O layer is bistable for two lattice parameters, being metallic for one and semiconducting for another parameter. In a switching configuration, this provides a high current ON/OFF ratio when the layer is biased and stretched simultaneously. The high sensitivity of conductance to layer stretching can be utilized for electromechanical switching, the bistability may provide a potential for application as a nonvolatile memory bit, while the current-voltage characteristic of the material in its semiconducting phase indicates a possible use as a varistor. The second part of the presentation will be about structural and magnetic properties of MXene nanotubes. Our density functional theory-based study predicts the existence of two mutually transformable polymorphs of Mo2C nanotubes with strikingly different properties. One polymorph exhibits unusual negative strain energy with respect to the planar Mo2C structure and the absence of any long-range magnetic order. The second polymorph displays an antiskyrmionic spin texture with a net magnetization along the tube’s axis. The two nanotube polymorphs may be converted into each other by axial tensile or compressive strains, allowing for their application as a magneto-mechanical switch and eventually a nonvolatile magnetic memory unit. PB - Tbilisi, Gruzija C3 - Tnano20: International Workshop on Nanotechnology, Book of abstracts T1 - Two faces of a double well: Multifunctional device based on Ti2O monolayer and magneto-mechanical switch based on MXene nanotube SP - 24 / I11 UR - https://hdl.handle.net/21.15107/rcub_rimsi_2325 ER -
@conference{ author = "Popov, Igor", year = "2020", abstract = "The presentation will consist of two parts. In the first part a new concept of multifunctional nanodevices as potential replacements for common transistors will be presented and a Ti 2 O monolayer as an example of such a nanodevice will be discussed. Our study based on density functional theory indicates that a Ti 2O layer is bistable for two lattice parameters, being metallic for one and semiconducting for another parameter. In a switching configuration, this provides a high current ON/OFF ratio when the layer is biased and stretched simultaneously. The high sensitivity of conductance to layer stretching can be utilized for electromechanical switching, the bistability may provide a potential for application as a nonvolatile memory bit, while the current-voltage characteristic of the material in its semiconducting phase indicates a possible use as a varistor. The second part of the presentation will be about structural and magnetic properties of MXene nanotubes. Our density functional theory-based study predicts the existence of two mutually transformable polymorphs of Mo2C nanotubes with strikingly different properties. One polymorph exhibits unusual negative strain energy with respect to the planar Mo2C structure and the absence of any long-range magnetic order. The second polymorph displays an antiskyrmionic spin texture with a net magnetization along the tube’s axis. The two nanotube polymorphs may be converted into each other by axial tensile or compressive strains, allowing for their application as a magneto-mechanical switch and eventually a nonvolatile magnetic memory unit.", publisher = "Tbilisi, Gruzija", journal = "Tnano20: International Workshop on Nanotechnology, Book of abstracts", title = "Two faces of a double well: Multifunctional device based on Ti2O monolayer and magneto-mechanical switch based on MXene nanotube", pages = "24 / I11", url = "https://hdl.handle.net/21.15107/rcub_rimsi_2325" }
Popov, I.. (2020). Two faces of a double well: Multifunctional device based on Ti2O monolayer and magneto-mechanical switch based on MXene nanotube. in Tnano20: International Workshop on Nanotechnology, Book of abstracts Tbilisi, Gruzija., 24 / I11. https://hdl.handle.net/21.15107/rcub_rimsi_2325
Popov I. Two faces of a double well: Multifunctional device based on Ti2O monolayer and magneto-mechanical switch based on MXene nanotube. in Tnano20: International Workshop on Nanotechnology, Book of abstracts. 2020;:24 / I11. https://hdl.handle.net/21.15107/rcub_rimsi_2325 .
Popov, Igor, "Two faces of a double well: Multifunctional device based on Ti2O monolayer and magneto-mechanical switch based on MXene nanotube" in Tnano20: International Workshop on Nanotechnology, Book of abstracts (2020):24 / I11, https://hdl.handle.net/21.15107/rcub_rimsi_2325 .