Functional Quantum Materials Laboratory

Scientific results:

A comprehensive experimental and theoretical study has been carried out on a number of new functional quantum materials, including:

1. Synthesis, Raman scattering and ab initio calculations of the magnetic structure of copper chloride selenate Cu9O2(SeO3)4Cl6. The main parameters of the energy spectrum and the scale of exchange interactions have been established.
2. Synthesis, thermodynamic and optical properties of the new langasite Pr3CrGe3Be2O14. The features of the formation of ferroelectric and magnetic states have been established.
3. New complex copper phosphates with a disordered structure of guest atoms have been synthesized and their magnetic properties have been established.
4. A comprehensive structural and magnetic study was carried out and the basic characteristics of new nickel phosphates with the ellenbergerite structure were established.
5. New nickel tellurates A2Ni2TeO6 (A = K, Li) have been synthesized and studied, in which zigzag magnetic ordering is realized due to interaction with the third after the nearest magnetic neighbor.
6. The parameters of magnetoelastic interaction have been established and the magnetic phase diagram of Francisite Cu3Bi(SeO3)2O2Cl with a corrugated kagome type lattice has been determined.
7. 1/3 of the magnetization plateau was discovered in the newly synthesized copper selenite chloride Pb2Cu10O4(SeO3)4Cl7, which is due to the formation of (Cu2+)7 clusters of (Cu2+)4 tetrahedra connected at the vertices.
8. Synthesis and establishment of the basic magnetic characteristics of a new compound K2Mn3Si7O18(H2O)2 containing sawtooth chains of MnO6 in a silicate matrix.
9. The influence of magnetic anisotropy on the physical properties of newly synthesized nitrates (NO)M(NO3)3 (M = Co, Ni) with a square antiferromagnetic lattice was studied
10. The formation of an Ising magnetic order in the newly synthesized nitrate dihydrate Co(NO3)2×2H2O was discovered and its basic thermodynamic characteristics were established.
11. A new quasi-one-dimensional metal oxide compound with a linarite structure, PbCu(SeO4)(OH)2, has been synthesized, the magnetic properties of which are determined by competing intrachain exchange interactions of nearest neighbors and next-nearest neighbors.
12. The magnetic phase diagram of the new van der Waals antiferromagnet TbTe3 has been established.
13. An anisotropic 1/3 magnetization plateau was discovered in the ferrimagnet Cs2Cu3(SeO3)4 2H2O and the topology of the magnetic coupling necessary for the formation of this plateau was established.
14. Complex manganese oxide with variable valence LiMn2TeO6 was studied and the basic characteristics of its quantum ground state were established.

Education and personnel occupational retraining:

1. There were defended 3 PhD theses for the degree of candidate of physical and mathematical sciences (Vasilchikova T.M. and Koshelev A.V.) and chemical (Murtazoev A.F.) sciences and one doctoral dissertation (Shvanskaya L.V.) for the degree of Doctor of Science
2. 6 students that worked in the laboratory entered graduate school and work on PhD theses in the laboratory field of research
3. Three new educational programs have been developed: “Modern approaches to the synthesis of new materials”, “Physics of low-dimensional magnetism” and “New materials for information and energy-saving technologies”.

Cooperation:

1. Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, Ekaterinburg 620108, Russia
2. Institute of Solid State Physics, RAS, Chernogolovka 142432, Russia
3. Kapitza Institute for Physical Problems, RAS, Moscow 119334, Russia
4. Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA
5. Department of Chemistry and Research Institute for Basic Sciences, Kyung Hee University, Seoul 02447, Republic of Korea
6. S.N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700106, India