Download The quantum-functional properties of Pr Pb La Te

The quantum-functional properties of Pr1−x−y Pbx Lay Te
T. Herrmannsdörfer, A. Bianchi, and J. Wosnitza
Dresden High Magnetic Field Laboratory, Forschungszentrum Rossendorf, P.O.-Box 51 01 19, D-01314
Dresden, Germany
The intermetallic compound Pr1−x−y Lax Pby Te shows a wide spectrum of physical phenomena. Depending on the metallurgical composition as function of x and y, the compound changes its behavior from
nuclear magnetic order to super- or semiconductivity. In addition, there are interesting interplay effects
between these ground states. In detail, in PrTe the crystal electrical field splitting with a singlet ground
state leads to van Vleck paramagnetism, whereas several other rare-earth tellurides possess a magnetically
ordered ground state. However, the nuclear magnetic moments of Pr are effectively hyperfine enhanced
as well as strongly coupled to the conduction electrons in PrTe. In consequence, the effective nuclear
magnetic moments order antiferromagnetically at 0.6 mK. LaTe is a superconductor with T c = 5.7 K.
The singlet ground state of the Pr ions in Pr1−x Lax Te leads to a large critical Pr concentration x = 0.5
for Cooper-pair breaking. Finally, PbTe is a narrow-band semiconductor and Pr1−y Pby Te appeares to
be a nuclear magnetic semiconductor. In consequence, Pr1−x−y Lax Pby Te may serve as an interesting
candidate for studies on quantum computing. In this contribution, experimental results taken in a wide
range of temperature, 0.1 mK ≤ T ≤ 300 K, are presented and discussed in the context of possible
quantum-computing applications. Further, effects which arise through the application of high magnetic
fields are discussed.
Sorting category: Cf Magnetism and properties of solids
Keywords: quantum functional materials, quantum computing, hyperfine enhanced nuclear magnets
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