Unusual spin pseudogap behavior in the spin web lattice Cu_{3}TeO_{6} probed by ^{125}Te nuclear magnetic resonance
We present a ^{125}Te nuclear magnetic resonance (NMR) study in the three-dimensional spin web lattice Cu_{3}TeO_{6} which harbors topological magnons. The ^{125}Te NMR spectra and the Knight-shift K as a function of temperature show a drastic change at T_{S}∼40K much lower than the Néel ordering te...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2021-08-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.3.033109 |
| _version_ | 1797211016007778304 |
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| author | Seung-Ho Baek Hyeon Woo Yeo Jena Park Kwang-Yong Choi Bernd Büchner |
| author_facet | Seung-Ho Baek Hyeon Woo Yeo Jena Park Kwang-Yong Choi Bernd Büchner |
| author_sort | Seung-Ho Baek |
| collection | DOAJ |
| description | We present a ^{125}Te nuclear magnetic resonance (NMR) study in the three-dimensional spin web lattice Cu_{3}TeO_{6} which harbors topological magnons. The ^{125}Te NMR spectra and the Knight-shift K as a function of temperature show a drastic change at T_{S}∼40K much lower than the Néel ordering temperature T_{N}∼61K, providing evidence for the first-order structural phase transition within the magnetically ordered state. Most remarkably, the temperature dependence of the spin-lattice relaxation rate T_{1}^{−1} unravels spin-gap-like magnetic excitations, which sharply sets in at T^{*}∼75K, the temperature well above T_{N}. The spin-gap behavior may be understood by weakly dispersive optical magnon branches of high-energy spin excitations originating from the unique corner-sharing Cu hexagon spin-1/2 network with low coordination number. |
| first_indexed | 2024-04-24T10:19:47Z |
| format | Article |
| id | doaj.art-bda44ea5909e406cbb9d04ee79adb4d6 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:19:47Z |
| publishDate | 2021-08-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-bda44ea5909e406cbb9d04ee79adb4d62024-04-12T17:12:28ZengAmerican Physical SocietyPhysical Review Research2643-15642021-08-013303310910.1103/PhysRevResearch.3.033109Unusual spin pseudogap behavior in the spin web lattice Cu_{3}TeO_{6} probed by ^{125}Te nuclear magnetic resonanceSeung-Ho BaekHyeon Woo YeoJena ParkKwang-Yong ChoiBernd BüchnerWe present a ^{125}Te nuclear magnetic resonance (NMR) study in the three-dimensional spin web lattice Cu_{3}TeO_{6} which harbors topological magnons. The ^{125}Te NMR spectra and the Knight-shift K as a function of temperature show a drastic change at T_{S}∼40K much lower than the Néel ordering temperature T_{N}∼61K, providing evidence for the first-order structural phase transition within the magnetically ordered state. Most remarkably, the temperature dependence of the spin-lattice relaxation rate T_{1}^{−1} unravels spin-gap-like magnetic excitations, which sharply sets in at T^{*}∼75K, the temperature well above T_{N}. The spin-gap behavior may be understood by weakly dispersive optical magnon branches of high-energy spin excitations originating from the unique corner-sharing Cu hexagon spin-1/2 network with low coordination number.http://doi.org/10.1103/PhysRevResearch.3.033109 |
| spellingShingle | Seung-Ho Baek Hyeon Woo Yeo Jena Park Kwang-Yong Choi Bernd Büchner Unusual spin pseudogap behavior in the spin web lattice Cu_{3}TeO_{6} probed by ^{125}Te nuclear magnetic resonance Physical Review Research |
| title | Unusual spin pseudogap behavior in the spin web lattice Cu_{3}TeO_{6} probed by ^{125}Te nuclear magnetic resonance |
| title_full | Unusual spin pseudogap behavior in the spin web lattice Cu_{3}TeO_{6} probed by ^{125}Te nuclear magnetic resonance |
| title_fullStr | Unusual spin pseudogap behavior in the spin web lattice Cu_{3}TeO_{6} probed by ^{125}Te nuclear magnetic resonance |
| title_full_unstemmed | Unusual spin pseudogap behavior in the spin web lattice Cu_{3}TeO_{6} probed by ^{125}Te nuclear magnetic resonance |
| title_short | Unusual spin pseudogap behavior in the spin web lattice Cu_{3}TeO_{6} probed by ^{125}Te nuclear magnetic resonance |
| title_sort | unusual spin pseudogap behavior in the spin web lattice cu 3 teo 6 probed by 125 te nuclear magnetic resonance |
| url | http://doi.org/10.1103/PhysRevResearch.3.033109 |
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