Colossal magnetoresistance from spin-polarized polarons in an Ising system
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917947524513792 |
|---|---|
| author | Li, Ying-Fei Been, Emily M. Balguri, Sudhaman Jia, Chun-Jing Mahenderu, Mira B. Wang, Zhi-Cheng Cui, Yi Chen, Su-Di Hashimoto, Makoto Lu, Dong-Hui Moritz, Brian Zaanen, Jan Tafti, Fazel Devereaux, Thomas P. Shen, Zhi-Xun |
| author_facet | Li, Ying-Fei Been, Emily M. Balguri, Sudhaman Jia, Chun-Jing Mahenderu, Mira B. Wang, Zhi-Cheng Cui, Yi Chen, Su-Di Hashimoto, Makoto Lu, Dong-Hui Moritz, Brian Zaanen, Jan Tafti, Fazel Devereaux, Thomas P. Shen, Zhi-Xun |
| contents | Recent experiments suggest a new paradigm towards novel colossal magnetoresistance (CMR) in a family of materials EuM$_2$X$_2$(M=Cd, In, Zn; X=P, As), distinct from the traditional avenues involving Kondo-RKKY crossovers, magnetic phase transitions with structural distortions, or topological phase transitions. Here, we use angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) calculations to explore their origin, particularly focusing on EuCd$_2$P$_2$. While the low-energy spectral weight royally tracks that of the resistivity anomaly near the temperature with maximum magnetoresistance (T$_{MR}$) as expected from transport-spectroscopy correspondence, the spectra are completely incoherent and strongly suppressed with no hint of a Landau quasiparticle. Using systematic material and temperature dependence investigation complemented by theory, we attribute this non-quasiparticle caricature to the strong presence of entangled magnetic and lattice interactions, a characteristic enabled by the $p$-$f$ mixing. Given the known presence of ferromagnetic clusters, this naturally points to the origin of CMR being the scattering of spin-polarized polarons at the boundaries of ferromagnetic clusters. These results are not only illuminating to investigate the strong correlations and topology in EuCd$_2$X$_2$ family, but, in a broader view, exemplify how multiple cooperative interactions can give rise to extraordinary behaviors in condensed matter systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_22727 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Colossal magnetoresistance from spin-polarized polarons in an Ising system Li, Ying-Fei Been, Emily M. Balguri, Sudhaman Jia, Chun-Jing Mahenderu, Mira B. Wang, Zhi-Cheng Cui, Yi Chen, Su-Di Hashimoto, Makoto Lu, Dong-Hui Moritz, Brian Zaanen, Jan Tafti, Fazel Devereaux, Thomas P. Shen, Zhi-Xun Strongly Correlated Electrons Recent experiments suggest a new paradigm towards novel colossal magnetoresistance (CMR) in a family of materials EuM$_2$X$_2$(M=Cd, In, Zn; X=P, As), distinct from the traditional avenues involving Kondo-RKKY crossovers, magnetic phase transitions with structural distortions, or topological phase transitions. Here, we use angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) calculations to explore their origin, particularly focusing on EuCd$_2$P$_2$. While the low-energy spectral weight royally tracks that of the resistivity anomaly near the temperature with maximum magnetoresistance (T$_{MR}$) as expected from transport-spectroscopy correspondence, the spectra are completely incoherent and strongly suppressed with no hint of a Landau quasiparticle. Using systematic material and temperature dependence investigation complemented by theory, we attribute this non-quasiparticle caricature to the strong presence of entangled magnetic and lattice interactions, a characteristic enabled by the $p$-$f$ mixing. Given the known presence of ferromagnetic clusters, this naturally points to the origin of CMR being the scattering of spin-polarized polarons at the boundaries of ferromagnetic clusters. These results are not only illuminating to investigate the strong correlations and topology in EuCd$_2$X$_2$ family, but, in a broader view, exemplify how multiple cooperative interactions can give rise to extraordinary behaviors in condensed matter systems. |
| title | Colossal magnetoresistance from spin-polarized polarons in an Ising system |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2410.22727 |