Quantized (or not quantized) thermal Hall effect and oscillations in the thermal conductivity in the Kitaev spin liquid candidate α-RuCl3

ABSTRACTIn the field of thermoelectrics, the figure of merit of new materials is based on the electrical conductivity, thermoelectric power, and thermal conductivity of the sample, however additional insight is gained through knowledge of the carrier concentrations and mobility in the materials. The figure of merit is commonly related to the material properties through the B factor which is directly dependent on the mobility of the carriers as well as the effective mass.To gain additional insight on the new materials of interest for thermoelectric applications, a Hall Effect system has been developed for measuring the temperature dependent carrier concentrations and mobilities. In this paper, the measurement system will be described, and recent results for several new materials will be presented.

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Sample dependence of half-integer quantized thermal Hall effect in the Kitaev spin-liquid candidate α−RuCl3

Physical Review B ◽

10.1103/physrevb.102.220404 ◽

2020 ◽

Vol 102 (22) ◽

Author(s):

M. Yamashita ◽

J. Gouchi ◽

Y. Uwatoko ◽

N. Kurita ◽

H. Tanaka

Keyword(s):

Hall Effect ◽

Spin Liquid ◽

Half Integer

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The Influence of Ni on the Transport Properties of CoSb3

MRS Proceedings ◽

10.1557/proc-626-z10.3 ◽

2000 ◽

Vol 626 ◽

Cited By ~ 2

Author(s):

Ctirad Uher ◽

Jeffrey S. Dyck ◽

Wei Chen ◽

Gregory P. Meisner ◽

Jihui Yanga

Keyword(s):

Thermal Conductivity ◽

Low Temperature ◽

Temperature Dependence ◽

Hall Effect ◽

Hall Coefficient ◽

Lower Energy ◽

Electronic Configuration ◽

Ni Doping ◽

Measured Resistivity ◽

Tetravalent State

ABSTRACTThe effect of Ni doping on the Co site of the binary skutterudite CoSb3 is investigated. We measured resistivity, Hall effect, magnetoresistance, thermopower, thermal conductivity, and magnetization of a series of samples of the form Co1-xNixSb3 with x in the range x=0 to x=0.01. We find that Ni takes the tetravalent state Ni4+, assumes the d6 electronic configuration for the lower energy non-bonding orbitals, and gives an electron to the conduction band. Ni doping dramatically suppresses the thermal conductivity, changes the temperature dependence of the thermopower, and increases the carrier concentration. Low temperature anomalies in thermopower, Hall coefficient and magnetoresistance are found.

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Spontaneous Hall Effect in the Spin Liquid Phase of Pr2Ir2O7

Journal of Physics Conference Series ◽

10.1088/1742-6596/320/1/012056 ◽

2011 ◽

Vol 320 ◽

pp. 012056 ◽

Cited By ~ 3

Author(s):

S Nakatsuji ◽

Y Machida ◽

J J Ishikawa ◽

S Onoda ◽

Y Karaki ◽

...

Keyword(s):

Liquid Phase ◽

Hall Effect ◽

Spin Liquid

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Tunable thermopower and thermal conductivity in Lu doped In2O3

RSC Advances ◽

10.1039/c4ra02358g ◽

2014 ◽

Vol 4 (60) ◽

pp. 31926-31931 ◽

Cited By ~ 8

Author(s):

BeiBei Zhu ◽

Ruoming Tian ◽

Tianshu Zhang ◽

Richard Donelson ◽

Thiam Teck Tan ◽

...

Keyword(s):

Thermal Conductivity ◽

Hall Effect ◽

Carrier Concentration ◽

Spark Plasma Sintering ◽

Valence State ◽

Hall Effect Measurement ◽

Precipitation Method ◽

Plasma Sintering ◽

Spark Plasma ◽

Co Precipitation

Lu doped polycrystalline In2O3 compounds (x = 0, 0.025, 0.05, 0.10, 0.15) were synthesized by a co-precipitation method followed by the spark plasma sintering processing. Hall Effect measurement indicates that the carrier concentration was drastically decreased with doping, although Lu and In have the same valence state.

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