当前位置：
X-MOL 学术
›
Ann. Phys. (Berlin)
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Magnetic‐Field‐Controlled Quantum Critical Points in the Triangular Antiferromagnetic Cs2CuCl4‐xBrx Mixed System
Annalen Der Physik ( IF 2.2 ) Pub Date : 2020-06-09 , DOI: 10.1002/andp.202000147 Natalija Well 1, 2, 3 , Sitaram Ramakrishnan 2 , Ketty Beauvois 4 , Navid Qureshi 4 , Eric Ressouche 5 , Markos Skoulatos 6, 7 , Robert Georgii 6, 7 , Oksana Zaharko 3 , Sander Smaalen 2
Annalen Der Physik ( IF 2.2 ) Pub Date : 2020-06-09 , DOI: 10.1002/andp.202000147 Natalija Well 1, 2, 3 , Sitaram Ramakrishnan 2 , Ketty Beauvois 4 , Navid Qureshi 4 , Eric Ressouche 5 , Markos Skoulatos 6, 7 , Robert Georgii 6, 7 , Oksana Zaharko 3 , Sander Smaalen 2
Affiliation
|
The triangular antiferromagnetic Cs2CuCl4‐xBrx mixed system is studied by neutron single‐crystal diffraction in magnetic field. It shows a rich magnetic phase diagram consisting of four regimes depending on the Br concentration and is characterized by different exchange coupling mechanisms. For the investigated compositions from regime I (0 < x ≤ 1.5), a critical magnetic field Bc is found for a Br concentration x = 0.8 at Bc = 8.10(1) T and for x = 1.1 at Bc = 7.73(1) T and from regime IV (3.2 < x < 4) for x = 3.3 at Bc = 0.99(3) T. For magnetic fields larger than the respective Bc, magnetic superlattice reflections of these compounds are not found. The incommensurate magnetic wave vector q = (0, 0.470, 0) appears below the ordering temperature TN = 0.51(1) K for Cs2CuCl3.2Br0.8, and q = (0, 0.418, 0) below TN = 1.00(6) K for Cs2CuCl0.3Br3.7. Neutron diffraction experiments at around 60 mK for x = 3.7 in a magnetic field show the critical magnetic field at Bc = 7.94(16) T and the formation of the second magnetic phase at around 8.5 T depending on the temperature. Inelastic neutron scattering experiments for the compound from regime III (2 < x ≤ 3.2) with x = 2.2 show dynamical correlations at a temperature around 50 mK giving evidence for a spin liquid phase.
中文翻译：
三角反铁磁Cs2CuCl4-xBrx混合系统中的磁场控制量子临界点
通过磁场中的中子单晶衍射研究了三角形反铁磁Cs 2 CuCl 4- x Br x混合体系。它显示了一个丰富的磁相图，该图由取决于Br浓度的四个区域组成，并且具有不同的交换耦合机制。对于从制度我所研究组合物（0 < X ≤1.5），临界磁场乙Ç被发现为溴浓度X = 0.8在乙Ç = 8.10（1）T和X = 1.1的乙Ç = 7.73（ 1）T和从方案IV（3.2 < x <4）得出 x在B c = 0.99（3）T时= 3.3 。对于大于各自B c的磁场，未发现这些化合物的磁性超晶格反射。对于Cs 2 CuCl 3.2 Br 0.8，不规则的磁波矢量q =（0，0.470，0）出现在订购温度T N = 0.51（1）K以下，而T N = 1.00以下的q =（0，0.418，0）（6）K为铯2的CuCl 0.3溴3.7。x在60 mK左右的中子衍射实验磁场中的3.7 =表示在B c = 7.94（16）T处的临界磁场，并根据温度在8.5 T处形成第二磁性相。非弹性中子散射实验用于从政权III化合物（2 < X ≤3.2）与X = 2.2节目动力学相关性在约50 mK的温度为给自旋液相证据。
更新日期：2020-06-09
中文翻译：
三角反铁磁Cs2CuCl4-xBrx混合系统中的磁场控制量子临界点
通过磁场中的中子单晶衍射研究了三角形反铁磁Cs 2 CuCl 4- x Br x混合体系。它显示了一个丰富的磁相图，该图由取决于Br浓度的四个区域组成，并且具有不同的交换耦合机制。对于从制度我所研究组合物（0 < X ≤1.5），临界磁场乙Ç被发现为溴浓度X = 0.8在乙Ç = 8.10（1）T和X = 1.1的乙Ç = 7.73（ 1）T和从方案IV（3.2 < x <4）得出 x在B c = 0.99（3）T时= 3.3 。对于大于各自B c的磁场，未发现这些化合物的磁性超晶格反射。对于Cs 2 CuCl 3.2 Br 0.8，不规则的磁波矢量q =（0，0.470，0）出现在订购温度T N = 0.51（1）K以下，而T N = 1.00以下的q =（0，0.418，0）（6）K为铯2的CuCl 0.3溴3.7。x在60 mK左右的中子衍射实验磁场中的3.7 =表示在B c = 7.94（16）T处的临界磁场，并根据温度在8.5 T处形成第二磁性相。非弹性中子散射实验用于从政权III化合物（2 < X ≤3.2）与X = 2.2节目动力学相关性在约50 mK的温度为给自旋液相证据。
京公网安备 11010802027423号