Short and long-range magnetic ordering and emergent topological transition in (Mn1−xNix)2P2S6
Abstract Two-dimensional magnetic materials with tunable physical parameters are emerging as potential candidates for topological phenomena as well as applications in spintronics. The famous Mermin-Wagner theorem states that spontaneous spin symmetry cannot be broken at finite temperature in low dim...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-02-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-025-88586-0 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1823862323091079168 |
|---|---|
| author | Nasaru Khan Deepu Kumar Shantanu Semwal Yuliia Shemerliuk Bernd Büchner Koushik Pal Saicharan Aswartham Pradeep Kumar |
| author_facet | Nasaru Khan Deepu Kumar Shantanu Semwal Yuliia Shemerliuk Bernd Büchner Koushik Pal Saicharan Aswartham Pradeep Kumar |
| author_sort | Nasaru Khan |
| collection | DOAJ |
| description | Abstract Two-dimensional magnetic materials with tunable physical parameters are emerging as potential candidates for topological phenomena as well as applications in spintronics. The famous Mermin-Wagner theorem states that spontaneous spin symmetry cannot be broken at finite temperature in low dimensional magnetic systems which forbids the possibility of a transition to a long-range ordered state in a two-dimensional magnetic system at finite temperature. Though, there are some exceptions to Mermin-Wagner theorem in particular low dimensional magnetic systems with topologically ordered phase transitions. Here, we present an in-depth temperature dependent analysis for the bulk single crystals of two-dimensional (Mn1−xNix)2P2S6 with x = 1, 0.7, 0.3, 0 using the Raman spectroscopy supported by first-principles calculations of the phonon frequencies. We observed multiple phase transitions with tunability as a function of doping associated with the short and long-range spin-spin correlations. First transition at ~ 150 K to ~ 170 K for x = 0 to x = 0.7, and second one from ~ 60 K to ~ 153 K. Quite interestingly, a third transition is observed at low temperature (much below their respective T N ) ~ 24 K to ~ 60 K and is attributed to the potential topological phase transition. These transitions are marked by the distinct changes observed in the temperature evolution of the phonon self-energy parameters, modes intensity and dynamic Raman susceptibility. |
| format | Article |
| id | doaj-art-9a9671def03149d986ff3d692e53d404 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-9a9671def03149d986ff3d692e53d4042025-02-09T12:33:22ZengNature PortfolioScientific Reports2045-23222025-02-0115111410.1038/s41598-025-88586-0Short and long-range magnetic ordering and emergent topological transition in (Mn1−xNix)2P2S6Nasaru Khan0Deepu Kumar1Shantanu Semwal2Yuliia Shemerliuk3Bernd Büchner4Koushik Pal5Saicharan Aswartham6Pradeep Kumar7School of Physical Sciences, Indian Institute of Technology MandiSchool of Physical Sciences, Indian Institute of Technology MandiDepartment of Physics, Indian Institute of Technology KanpurLeibniz-Institute for Solid-state and Materials Research, IFW-DresdenLeibniz-Institute for Solid-state and Materials Research, IFW-DresdenDepartment of Physics, Indian Institute of Technology KanpurLeibniz-Institute for Solid-state and Materials Research, IFW-DresdenSchool of Physical Sciences, Indian Institute of Technology MandiAbstract Two-dimensional magnetic materials with tunable physical parameters are emerging as potential candidates for topological phenomena as well as applications in spintronics. The famous Mermin-Wagner theorem states that spontaneous spin symmetry cannot be broken at finite temperature in low dimensional magnetic systems which forbids the possibility of a transition to a long-range ordered state in a two-dimensional magnetic system at finite temperature. Though, there are some exceptions to Mermin-Wagner theorem in particular low dimensional magnetic systems with topologically ordered phase transitions. Here, we present an in-depth temperature dependent analysis for the bulk single crystals of two-dimensional (Mn1−xNix)2P2S6 with x = 1, 0.7, 0.3, 0 using the Raman spectroscopy supported by first-principles calculations of the phonon frequencies. We observed multiple phase transitions with tunability as a function of doping associated with the short and long-range spin-spin correlations. First transition at ~ 150 K to ~ 170 K for x = 0 to x = 0.7, and second one from ~ 60 K to ~ 153 K. Quite interestingly, a third transition is observed at low temperature (much below their respective T N ) ~ 24 K to ~ 60 K and is attributed to the potential topological phase transition. These transitions are marked by the distinct changes observed in the temperature evolution of the phonon self-energy parameters, modes intensity and dynamic Raman susceptibility.https://doi.org/10.1038/s41598-025-88586-0 |
| spellingShingle | Nasaru Khan Deepu Kumar Shantanu Semwal Yuliia Shemerliuk Bernd Büchner Koushik Pal Saicharan Aswartham Pradeep Kumar Short and long-range magnetic ordering and emergent topological transition in (Mn1−xNix)2P2S6 Scientific Reports |
| title | Short and long-range magnetic ordering and emergent topological transition in (Mn1−xNix)2P2S6 |
| title_full | Short and long-range magnetic ordering and emergent topological transition in (Mn1−xNix)2P2S6 |
| title_fullStr | Short and long-range magnetic ordering and emergent topological transition in (Mn1−xNix)2P2S6 |
| title_full_unstemmed | Short and long-range magnetic ordering and emergent topological transition in (Mn1−xNix)2P2S6 |
| title_short | Short and long-range magnetic ordering and emergent topological transition in (Mn1−xNix)2P2S6 |
| title_sort | short and long range magnetic ordering and emergent topological transition in mn1 xnix 2p2s6 |
| url | https://doi.org/10.1038/s41598-025-88586-0 |
| work_keys_str_mv | AT nasarukhan shortandlongrangemagneticorderingandemergenttopologicaltransitioninmn1xnix2p2s6 AT deepukumar shortandlongrangemagneticorderingandemergenttopologicaltransitioninmn1xnix2p2s6 AT shantanusemwal shortandlongrangemagneticorderingandemergenttopologicaltransitioninmn1xnix2p2s6 AT yuliiashemerliuk shortandlongrangemagneticorderingandemergenttopologicaltransitioninmn1xnix2p2s6 AT berndbuchner shortandlongrangemagneticorderingandemergenttopologicaltransitioninmn1xnix2p2s6 AT koushikpal shortandlongrangemagneticorderingandemergenttopologicaltransitioninmn1xnix2p2s6 AT saicharanaswartham shortandlongrangemagneticorderingandemergenttopologicaltransitioninmn1xnix2p2s6 AT pradeepkumar shortandlongrangemagneticorderingandemergenttopologicaltransitioninmn1xnix2p2s6 |