%0 Journal Article %1 PhysRevResearch.3.033109 %A Baek, Seung-Ho %A Yeo, Hyeon Woo %A Park, Jena %A Choi, Kwang-Yong %A Büchner, Bernd %D 2021 %I American Physical Society %J Phys. Rev. Res. %K a %N 3 %P 033109 %R 10.1103/PhysRevResearch.3.033109 %T Unusual spin pseudogap behavior in the spin web lattice Cu$_3$TeO$_6$ probed by $^125$Te nuclear magnetic resonance %U https://link.aps.org/doi/10.1103/PhysRevResearch.3.033109 %V 3 %X We present a 125Te nuclear magnetic resonance (NMR) study in the three-dimensional spin web lattice Cu3TeO6 which harbors topological magnons. The 125Te NMR spectra and the Knight-shift K as a function of temperature show a drastic change at TS∼40K much lower than the Néel ordering temperature TN∼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−11 unravels spin-gap-like magnetic excitations, which sharply sets in at T∗∼75K, the temperature well above TN. 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.

@article{PhysRevResearch.3.033109, abstract = {We present a 125Te nuclear magnetic resonance (NMR) study in the three-dimensional spin web lattice Cu3TeO6 which harbors topological magnons. The 125Te NMR spectra and the Knight-shift K as a function of temperature show a drastic change at TS∼40K much lower than the Néel ordering temperature TN∼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−11 unravels spin-gap-like magnetic excitations, which sharply sets in at T∗∼75K, the temperature well above TN. 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.}, added-at = {2023-11-16T13:53:05.000+0100}, author = {Baek, Seung-Ho and Yeo, Hyeon Woo and Park, Jena and Choi, Kwang-Yong and B\"uchner, Bernd}, biburl = {https://www.bibsonomy.org/bibtex/23181857b2820df4a063c4f6d62a29ea7/ctqmat}, day = 02, doi = {10.1103/PhysRevResearch.3.033109}, interhash = {680eb2d35a98422c1d622f5cff56c6d6}, intrahash = {3181857b2820df4a063c4f6d62a29ea7}, journal = {Phys. Rev. Res.}, keywords = {a}, month = {08}, number = 3, numpages = {6}, pages = 033109, publisher = {American Physical Society}, timestamp = {2023-11-16T13:54:43.000+0100}, title = {Unusual spin pseudogap behavior in the spin web lattice Cu$_\mathbf{3}$TeO$_\mathbf{6}$ probed by $^{125}$Te nuclear magnetic resonance}, url = {https://link.aps.org/doi/10.1103/PhysRevResearch.3.033109}, volume = 3, year = 2021 }