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The very-low-temperature thermal conductivity (\kappa) is studied for BaCo_2V_2O_8, a quasi-one-dimensional Ising-like antiferromagnet exhibiting an unusual magnetic-field-induced order-to-disorder transition. The nearly isotropic transport…

Strongly Correlated Electrons · Physics 2012-04-17 Z. Y. Zhao , X. G. Liu , Z. Z. He , X. M. Wang , C. Fan , W. P. Ke , Q. J. Li , L. M. Chen , X. Zhao , X. F. Sun

We study the low-temperature heat transport, as well as the magnetization and the specific heat, of TmMnO_3 single crystals to probe the transitions of magnetic structure induced by magnetic field. It is found that the low-T thermal…

Strongly Correlated Electrons · Physics 2012-11-19 X. M. Wang , Z. Y. Zhao , C. Fan , X. G. Liu , Q. J. Li , F. B. Zhang , L. M. Chen , X. Zhao , X. F. Sun

We report the magnetic-field dependence of thermal conductivity (\kappa) of an insulating cuprate Nd_2CuO_4 at very low temperatures down to 0.3 K. It is found that apart from the paramagnetic moments scattering on phonons, the Nd^{3+}…

Strongly Correlated Electrons · Physics 2011-10-20 Z. Y. Zhao , X. M. Wang , B. Ni , Q. J. Li , C. Fan , W. P. Ke , W. Tao , L. M. Chen , X. Zhao , X. F. Sun

The low-temperature thermal conductivity (\kappa) of GdFeO_3 single crystals is found to be strongly dependent on magnetic field. The low-field \kappa (H) curves show two "dips" for H \parallel a and only one "dip" for H \parallel c, with…

Strongly Correlated Electrons · Physics 2011-01-25 Z. Y. Zhao , X. M. Wang , C. Fan , W. Tao , X. G. Liu , W. P. Ke , F. B. Zhang , X. Zhao , X. F. Sun

Transport properties provide important information about the mobility, elastic and inelastic of scattering of excitations in solids. Heat transport is well understood for phonons and electrons, but little is known about heat transport by…

Strongly Correlated Electrons · Physics 2008-04-11 C. Hess

We report the study on the low-temperature heat transport of Ba_3Mn_2O_8 single crystal, a layered spin-dimer compound exhibiting the magnetic-field-induced magnetic order or the magnon Bose-Einstein condensation. The thermal conductivities…

Strongly Correlated Electrons · Physics 2011-10-20 W. P. Ke , X. M. Wang , C. Fan , Z. Y. Zhao , X. G. Liu , L. M. Chen , Q. J. Li , X. Zhao , X. F. Sun

We study the low-temperature heat transport of HoMnO_3 single crystals to probe the magnetic structures and their transitions induced by magnetic field. It is found that the low-T thermal conductivity (\kappa) shows very strong…

Strongly Correlated Electrons · Physics 2010-09-03 X. M. Wang , C. Fan , Z. Y. Zhao , W. Tao , X. G. Liu , W. P. Ke , X. Zhao , X. F. Sun

We studied the field dependent thermal conductivity ($\kappa$) of Na$_2$Co$_2$TeO$_6$, a compound considered as the manifestation of the Kitaev model based on the high-spin $d^7$ Co$^{2+}$ ions. We found that in-plane magnetic fields beyond…

We study the low-temperature thermal conductivity (\kappa) of Dy_2Ti_2O_7 along and perpendicular to the (111) plane and under the magnetic field along the [111] direction. Besides the step-like decreases of \kappa at the field-induced…

Strongly Correlated Electrons · Physics 2013-04-08 C. Fan , Z. Y. Zhao , H. D. Zhou , X. M. Wang , Q. J. Li , F. B. Zhang , X. Zhao , X. F. Sun

To study the effects of paramagnetic spins on phonons, both the in-plane and the c-axis heat transport of GdBaCo_{2}O_{5+x} (GBCO) single crystals are measured at low temperature down to 0.36 K and in magnetic field up to 16 T. It is found…

Strongly Correlated Electrons · Physics 2008-02-28 X. F. Sun , A. A. Taskin , X. Zhao , A. N. Lavrov , Yoichi Ando

The thermal conductivity $\kappa$ of the Kondo insulator SmB$_6$ was measured at low temperature, down to 70 mK, in magnetic fields up to 15 T, on single crystals grown using both the floating-zone and the flux methods. The residual linear…

We present experiments on the magnetic field-dependent thermal transport in the spin-1/2 ladder system (C$_5$H$_{12}$N)$_2$CuBr$_4$. The thermal conductivity $\kappa(B)$ is only weakly affected by the field-induced transitions between the…

Strongly Correlated Electrons · Physics 2015-05-14 A. V. Sologubenko , T. Lorenz , J. A. Mydosh , B. Thielemann , H. M. Ronnow , Ch. Ruegg , K. Kramer

The thermal conductivity ,$\kappa$, of Bi_2Sr_2CaCu_2O_8 was studied as a function of magnetic field. Above 5 K, after an initial decrease, $\kappa(H)$ presents a kink followed by a plateau, as recently reported by Krishana et al.. By…

Superconductivity · Physics 2009-10-31 H. Aubin , K. Behnia , S. Ooi , T. Tamegai

We report an in-plane thermal transport study of the honeycomb Kitaev material Na$_2$Co$_2$TeO$_6$ at subKelvin temperatures. In zero field, the $\kappa(T)$ displays a rather weak $T$-dependence but has a non-zero residual term…

Strongly Correlated Electrons · Physics 2023-05-16 S. K. Guang , N. Li , R. L. Luo , Q. Huang , Y. Y. Wang , X. Y. Yue , K. Xia , Q. J. Li , X. Zhao , G. Chen , H. D. Zhou , X. F. Sun

We investigate the phononic in-plane longitudinal low-temperature thermal conductivity kappa_ab of the Kitaev quantum magnet alpha-RuCl3 for large in-plane magnetic fields up to 33 T. Our data reveal for fields larger than the critical…

We report a study on low-temperature heat transport of Kitaev magnet Na$_2$Co$_2$TeO$_6$, with the heat current and magnetic fields along the honeycomb spin layer (the $ab$ plane). The zero-field thermal conductivity of $\kappa^a_{xx}$ and…

Strongly Correlated Electrons · Physics 2024-06-19 Shuangkui Guang , Na Li , Qing Huang , Ke Xia , Yiyan Wang , Hui Liang , Yan Sun , Qiuju Li , Xia Zhao , Rui Leonard Luo , Gang Chen , Haidong Zhou , Xuefeng Sun

Measurements of thermal conductivity (kappa) vs temperature are reported for a series of Ca_{1-x} La_x MnO_3(0 <= x <= 0.2) specimens. For the undoped (x=0), G-type antiferromagnetic compound a large enhancement of kappa below the Neel…

Strongly Correlated Electrons · Physics 2009-11-07 J. L. Cohn , J. J. Neumeier

We have measured the thermal conductivity in the ab-plane, $\kappa$ab, and along the c-axis, $\kappa$c, of single crystals of the S = 1/2 triangular-lattice antiferromagnet Ba3CoSb2O9 in zero field and magnetic fields. In zero field, it has…

Strongly Correlated Electrons · Physics 2015-10-30 K. Naruse , T. Kawamata , M. Ohno , Y. Matsuoka , H. Sudo , H. Nagasawa , Y. Hagiya , T. Sasaki , Y. Koike

We report a systematic study on the low-temperature thermal conductivity (\kappa) of R_2Ti_2O_7 (R = Gd and Er) single crystals with different directions of magnetic field and heat current. It is found that the magnetic excitations mainly…

Strongly Correlated Electrons · Physics 2014-03-06 F. B. Zhang , Q. J. Li , Z. Y. Zhao , C. Fan , S. J. Li , X. G. Liu , X. Zhao , X. F. Sun

We study the heat transport of S = 1/2 chain compound CuCl_2$\cdot$2((CH_3)_2SO) along the b axis (vertical to the chain direction) at very low temperatures. The zero-field thermal conductivity (\kappa) shows a distinct kink at about 0.9 K,…

Strongly Correlated Electrons · Physics 2015-06-17 W. P. Ke , J. Shi , F. B. Zhang , Z. Y. Zhao , X. Zhao , X. F. Sun
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