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Magnetic field tuning of parallel spin stripe order and fluctuations near the pseudogap quantum critical point in ▫$La_{1.36}Nd_{0.4}Sr_{0.24} CuO_4$▫Ma, Qianli ...A quantum critical point in the single-layer, hole-doped cuprate system La1.6−xNd0.4SrxCuO4 (Nd-LSCO) near x = 0.23 has been proposed as an organizing principle for understanding high-temperature ... superconductivity. Our earlier neutron diffraction work on Nd-LSCO at optimal and high doping revealed static parallel spin stripes to exist out to the quantum critical point and slightly beyond, at x = 0.24 and 0.26. We examine more closely the parallel spin stripe order parameter in Nd-LSCO in both zero magnetic field and fields up to 8 T for H II c in these single crystals. In contrast to earlier studies at lower doping, we observe that H II c in excess of ~2.5 T eliminates the incommensurate quasi-Bragg peaks associated with parallel spin stripes. But this elastic scattering is not destroyed by the field; rather it is transferred to commensurate Q = 0 Bragg positions, implying that the spins participating in the spin stripes have been polarized. Inelastic neutron scattering measurements at high fields show an increase in the low-energy, parallel spin stripe fluctuations and evidence for a spin gap [delta]spin = 3 ± 0.5 meV for Nd-LSCO with x = 0.24. This is shown to be consistent with spin-gap measurements as a function of superconducting TC over five different families of cuprate superconductors, which follow the approximate linear relation [delta]spin = 3.5kBTC.Vir: Physical review. B. [Elektronski vir]. - ISSN 2469-9969 (Vol. 106, iss. 21, 1 Dec. 2022, str. 214427-1-214427-10)Vrsta gradiva - e-članek ; neleposlovje za odrasleLeto - 2022Jezik - angleškiCOBISS.SI-ID - 135765251
Avtor
Ma, Qianli |
Smith, Evan M. |
Cronkwright, Zachary W. |
Dragomir, Mirela |
Mitchell, Gabrielle |
Winn, Barry W. |
Williams, Travis J. |
Gaulin, Bruce D.
Teme
magnetic order |
stripes |
cuprates |
high-temperature superconductors |
neutron scattering |
magnetni red |
trakovi |
kuprati |
visokotemperaturni superprevodniki |
nevtronsko sipanje
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Ma, Qianli | ![]() |
Smith, Evan M. | ![]() |
Cronkwright, Zachary W. | ![]() |
Dragomir, Mirela | 31976 |
Mitchell, Gabrielle | ![]() |
Winn, Barry W. | ![]() |
Williams, Travis J. | ![]() |
Gaulin, Bruce D. | ![]() |
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