The following table lists representative single-crystal materials we have synthesized using flux, floating-zone or electrochemical technique. We have provided single-crystal samples to more than 60 research groups in the US and around the world. These materials include transition metal oxides and chalcogenides. 

Crystals 

Structures

Materials

Exemplary Phenomena

Layered Perovskite

Iridates (Ir4+, 5d5):

Sr2IrO4, Sr3Ir2O7

Doped Srn+1IrnO3n+1

Dopants on the Sr site: Ca, Ba, Pb, K, and RE;

Dopants at the Ir site: 3d and 4d ions and Tb4+;

Ruthenates (Ru4+, 4d4): 

Can+1RunO3n+1,

 Srn+1RunO3n+1 (n=1,2,3,infinite)

(Ca,Sr)n+1RunO3n+1

Dopants at the Ru site: 3d, 4d and 5d ions

Iridates: Jeff  = 1/2 insulator; Hidden non-dipolar magnetic order, Lattice-driven magnetoresistance, Giant magnetoelectric effect, Non-Ohmic behavior, Unusual Hall effect, Insulating state highly resistant to high pressures, etc. 

 

Ruthenates: Orbitally-driven CMR, Bulk spin-valve effect, Orbital order, Oscillatory magnetoresistance periodic in both 1/B and B, Metamagnetism, AFM metallic state, Colossal negative thermal expansion via orbital/magnetic orders, Structurally-driven MIT, AFM, FM, Magnetization reversal, Coexistence of Mott state and quantum oscillations, High sensitivity to modest pressure and electrical-current, etc.

Honeycomb

Lattice

Iridates (Ir4+, 5d5):

Na2IrO3, (Li, Na, K)2IrO3, 

NaxIrO3

Doped Na2IrO3: Dopants: RE, Ca, Sr, 3d and 4d ions

Ruthenates (Ru4+, 4d4):

Li2RuO3, Na2RuO3

Iridates: Zigzag magnetic order, Unusual magnetoelectric effect, Highly frustrated state, etc.

 

Ruthenates: Lattice-tuned magnetic order. 

Hexagonal peroviskite

Iridates (Ir4+, 5d5):

BaIrO3, SrIrO3, (Ba,Sr)IrO3

Ca5Ir3O12, Ca4IrO6

Doped BaIrO3 and SrIrO3

Dopants at the Ir sites: 3d and 4d ions

Ruthenates (Ru4+, 4d4): 

BaRuO3, Doped BaRuO3, 

Rhodates(Rh3.5+, 4d5, 4d6): 

Sr5Rh4O12, Ba9Rh8O24

Manganites (Mn4+, 3d3): 

BaMnO3, doped BaMnO3

Iridates: Jeff = 1/2 insulator; AFM, Positive and unsaturated magnetoresistivity, Large magnetic coercivity, Non-Ohmic behavior, Magnetic frustration, Quantum critical point, MIT, etc. 

 

Ruthenates: MITQuantum oscillations, etc. 

 

Rhodates: Spin chains, Partial AFM, low-temperature magnetic order.

 

Manganites: High-temperature giant magnetoelectric effect coexisting with AFM state.

Pyrochlore

Iridates (Ir4+, 5d5):

Bi2Ir2O7, Pb2Ir2O7

Doped Bi2Ir2O7

Ruthenates (Ru4+, 4d4):

Bi2Ru2O7, Pb2Ru2O7

Iridates: Metallic States; Strong Magnetic Instability, Unusual Field Dependence of Heat Capacity, Unusually Large Wilson Ratio, etc.

Ruthenates: Unusual Metallic States.

Dimer/Trimer Lattice

Iridates (Ir4+, Ir5+, Ir6+): Ba5AlIr2O11, Ba4Ir3O10, Ba7Ir6O19, Ba13Ir6O30

New type quantum liquid, AFM insulator, Charge-order-dictated magnetic order.

Double Perovskite

Iridates (Ir5+, 5d4):

Sr2YIrO6, Ba2YIrOSr2GdIrO6, Sr2CoIrO6, Sr2FeIrO6

Ruthenates (Ru5+, 4d3):

Sr2YRuO6

Iridates: Novel magnetism, AFM metallic state. 

 

Ruthenates: AFM insulator.