The effect of magnetic and non-magnetic ion damage on the surface state in SmB6

Wakeham, N.; Wen, J.; Wang, Y. Q.; Fisk, Z.; Ronning, F.; Thompson, J. D.

doi:10.1016/j.jmmm.2015.07.045

Title: The effect of magnetic and non-magnetic ion damage on the surface state in SmB₆

Journal Article · Tue Jul 14 00:00:00 EDT 2015 · Journal of Magnetism and Magnetic Materials

DOI:https://doi.org/10.1016/j.jmmm.2015.07.045· OSTI ID:1374355

Wakeham, N. ^[1]; Wen, J. ^[2];

^[1]; Fisk, Z. ^[3];

^[1];

^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Lanzhou Univ., Gansu (China)
Univ. of California, Irvine, CA (United States)

SmB₆ is a Kondo insulator with a band structure that is topologically distinct from the vacuum. We theoretically predict this in order to produce metallic topological surface states that are robust to perturbations that do not break time reversal symmetry, such as non-magnetic defects. But, the surface state may be destroyed by an impurity with a sufficiently large magnetic moment. In order to test this prediction we show measurements of the resistance of the surface state of single crystals of SmB₆ with varying levels of damage induced by magnetic and non-magnetic ion irradiation. Finally, we find that at a sufficiently high concentration of damage the surface state reconstructs below an amorphous damaged layer, whether the damage was caused by a magnetic or non-magnetic ion.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1374355

Alternate ID(s):: OSTI ID: 1396746

Report Number(s):: LA-UR-17-22973

Journal Information:: Journal of Magnetism and Magnetic Materials, Vol. 400, Issue C; ISSN 0304-8853

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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References (18)

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36 MATERIALS SCIENCE
Material Science
SmB6
Topological Kondo insulator
magnetic
damage

Title: The effect of magnetic and non-magnetic ion damage on the surface state in SmB6

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Title: The effect of magnetic and non-magnetic ion damage on the surface state in SmB₆